Correlation between doctor`s belief on the patient`s self
Transcription
Correlation between doctor`s belief on the patient`s self
J Med Dent Sci 2013; 60: 23-40 Original Article Correlation between doctor’s belief on the patient’s self-determination and medical outcomes in obtaining informed consent Keisuke Yoshihara1, 2) and Kozo Takase2) 1) Mejiro University, Department of Business Administration, Faculty of Business Administration, Graduate School of Business Administration, Tokyo, Japan 2) Tokyo Medical and Dental University, Section of Research Development, Department of Public Health, Graduate School of Medical and Dental Sciences, Tokyo, Japan We employed a questionnaire survey to assess attitudes toward informed consent (IC) among hospital doctors. Based on the result of the correlation analysis, the following two hypotheses were identified. The first hypothesis is that “the doctor’s belief that the patient’s self-determination is possible promotes cure of illness by obtaining IC.” The second hypothesis is that “the doctor’s belief that the patient’s self-determination is possible has a positive influence on patient’s quality of life by obtaining IC.” We clarified the rationale for explaining these two hypotheses by applying cross tabulation analysis, discriminant analysis and principal component analysis (PCA). The doctors were divided into two groups in terms of their position on the patient’s selfdetermination. One group of doctors believed the possibility of patient’s self-determination, and the other did not. Through our statistical analyses, the characteristics that discriminate these two groups were identified. It was revealed that the former group placed a great importance on the hospitality value, while the latter placed an importance on the service value. Agreement or rejection of the concept of IC has been demonstrated as a key distinguishing factor between the two groups. The results of PCA showed that the doctor’s belief on Corresponding Author: Keisuke Yoshihara, MMA Professor of the Department of Business Administration, Faculty of Business Administration, Graduate School of Business Administration 4-31-1 Nakaochiai Shinjuku-ku Tokyo 161-8539, Japan Tel: +81-3-5996-3241 Fax: +81-3-5996-3060 E-mail: [email protected] Received September 27;Accepted November 16, 2012 the patient’s self-determination in obtaining IC had a significant effect on medical outcomes, and the two above-mentioned hypotheses were revealed. Key words: hospitality, service, self-determination, medical outcome Introduction The purpose of this study is to develop and validate the hypotheses regarding informed consent (IC) for the health care system in Japan and to examine if IC is 1 based on the hospitality concept among doctors . First, we employed a questionnaire survey to assess the attitudes toward IC among hospital doctors and the effect of their thoughts on IC on the cure of illnesses. Then, the hypotheses were developed based on the questionnaire and their reliability was investigated. IC mainly consists of agreement and consent from a patient 2-7 and the explanations provided by doctor. It is a concept that supports the patientʼs self-determination, where an interdependent relationship between a doctor and a patient brings a synergy effect on the cure of illnesses. However, it is questionable if doctors understand the concept of IC or use the opportunity of obtaining IC effectively in their current practice. The previous studies on IC have taken one of the three following viewpoints: medical ethics as a canon 2, 3, 8, communication between a doctor and a patient 9-11, and an interpretation of the legal aspects of I C 2 , 1 2 . The first viewpoint analyzed IC from the perspective of the medical ethics explained by Bai 8 based on the idea that IC is “the patient’s consent and the doctor’s explanations in regard to a medical t r e a t m en t .” T he s e c ond appr o a ch in v ol v e d t h e 24 J Med Dent Sci K. Yoshihara et al. investigation of the role of IC as a part of communication in medical care. The third approach involved legal aspects of IC. These studies display regard for value judgment, but deficit in management perspective in consideration of IC as a specific implementation. The present study can be employed as a fourth way of approach to elucidate the significance of IC embodied both the service concept and the hospitality concept. When refer to the preceding studies 9, 13, the concept of service was perceived as economic activities based on economic incentives, where the providers provide useful functionalities or activities to the recipients in one-way direction and the recipients pay a fee to the providers10. Although IC is one of the medical processes involved in providing service for the patient, we cannot use the service concept only in obtaining IC since service is a one-way process from a giver (doctor) to a taker (patient), and IC is not based solely on an idea of efficiency either. The service value is the precondition for the hospitality value to be formed. Therefore, IC must be explained by the hospitality concept as well as the service concept. Unlike the service concept, the hospitality concept allows doctors and patients to confront illnesses together 4, 14-16. Patients want to know the diagnoses and symptoms as well as prognoses of their illnesses, and the explanation of the doctor brings a sense of security on them. According to Seiichi Washida 4, rather than physicians simply explaining, it is important that they wait and watch how and what patients will talk about. They can increase their empathy by listening actively to the patients to understand them as individuals and to build relationships with them. IC should be performed through mutual creation by doctors and patients to maximize the hospitality value, if IC is supposed to be based on the hospitality concept. Otherwise, the relationship between doctors and patients would become one-way and manual-like as explained in the service concept. The hospitality concept is bidirectional and mutually complimentary, and it makes neither the doctor nor the patient in charge of their relationship. The present study was therefore conducted with both service and hospitality concepts in mind by identifying the distinguishing characteristics of the group of doctor who think that the patient’s self-determination is possible and those who do not. Then, the effect of doctor’s intentions such as emphasizing the hospitality value and encouraging the patient’s self-determination on medical outcomes was examined. Materials and Methods We conducted a questionnaire survey to achieve the aims of this study. In this study, our discussion is limited to the situation in which IC is obtained from the patients who are receiving medical care for the curable acute illnesses and are able to make medical decisions. Subjects of the Investigation: Doctors working in hospitals with 200 to 900 beds mainly in Kanto area of Japan were chosen as the target of this study. The selection criterion for the survey targets was that the hospital itself was able to cooperate and expressed that multiple departments within the hospital were able to cooperate. We chose five hospitals and distributed fifty questionnaire sheets to each hospital facility in order to collect data from a total of 250 doctors. The questionnaire was selfadministered voluntarily and anonymously by doctors. Questionnaire: We constructed a questionnaire that consists of 24 multiple choice items (See Appendix 2). The items in the questionnaire were divided into four categories: Ⅰ) Hospital Management (four items); Ⅱ) Doctor’s Intentions (ten items); Ⅲ) Relationship with Patients (six items); and Ⅳ) Medical Outcomes (four items). From each category, we identified the current situation of IC from the viewpoint of doctors (See Table 1). 20 of the 24 questions had four to seven choices, and the respondents had to choose one best answer. For example, it is as follows in the case of X6, to what extent do you honor patient’s requests for the disclosure of the medical records and other details? Circle one of the numbers below (one answer only). The five answers are as follows: 1) I strongly honor such requests; 2) I honor such requests to a certain degree; 3) Sometimes I do, sometimes I donʼt; 4) I usually donʼt honor such requests; and 5) I never honor such requests. Other items were multiple-answer questions. Methods and Study Period: The survey was first explained to the doctors and the questionnaire sheets were left at the hospitals for them to fill out voluntarily and anonymously. The questionnaire sheets were collected a few days later. The study was performed from October 20 to December 22, 2008. Details of the analysis: We examined the correlations between IC and “Medical Outcomes” and the other three categories, which are “Hospital Management,” “Doctor’s Intentions,” and doctor’s “Relationship with Patients.” The numerical points are assigned to the answer choices for each 25 Patient’s self-determination and medical outcomes Table 1. Questionnaire for the survey. X1 Organizational awareness of IC X2 Practical application of IC X3 Adequacy of time for IC X4 Communication between hospital personnel X5 Agreement or rejection of the concept of IC X6 Willingness to disclose patient’s medical information X7 Level of recognition/understanding of hospitality X8 Level of practice of hospitality X9 Level of conviction about future healthcare system X10 Point of emphasis in the explanation to patients X11 Extent of information disclosure to patients X12 Preparations before carrying out IC X13 Expectations for the patients at the time of IC enforcement X14 Possibility of patient’s self-determination X15 Posture of acceptance toward patients during IC enforcement X16 Level of friendliness toward patients X17 Level of generosity toward patients X18 Emphasis on empathy and the sense of unity with patients when obtaining IC X19 Emphasis on building a trusting relationship with patients X20 Desirable relationship between doctor and patient X21 Effect of IC on disease prognosis X22 Influence of IC on patient’s quality of life X23 Positive effects of IC X24 Effect of IC on the number of patients I. Hospital Management (X1- X4: 4 items) II. Doctor’s Intentions (X5- X14: 10 items) III. Relationship with Patients (X15- X20: 6 items) IV. Medical Outcomes (X21- X24: 4 items) Likert items; for example, the numerical points for each answer selection in X21 is shown below: 1) Strongly agree: 5 points; 2) Somewhat agree: 4 points; 3) I don’t particularly agree or disagree: 3 points; 4) Somewhat disagree: 2 points; 5) Strongly disagree: 1 point. We focused on the correlation between doctor’s intentions and the medical outcomes (See Table 1). The correlations between the doctor’s belief on the possibility of the patient’s self-determination (X5, 9, 11, and 14) and positive influences of IC on the treatment of disease (X21 and 22) were analyzed. X5, 9, 11, and 14 are essential scale variables from the viewpoint of patients for the concept of IC in correlation analysis. The discriminant analysis was performed to elucidate the influencing factors that distinguish the two groups assigned by the response to X14. The eight items (X2, 3, 5, 6, 8, and 18-20) were used as the explanatory variables. The dependent variable was taken from X14. X5, 6, and 18-20 were included in the analysis since they showed marked difference during the cross tabulation analysis (See Appendix 1). X2, 3, and 8 were not listed in Appendix 1 since they did not have a high significant difference compared to X5, 6, and 18-20, but they are included in the discriminant analysis as the scale variables. X21, 22, and 23 were excluded because they were in the medical outcomes section and were irrelevant as explanatory variables. X7, 10, and 13 were not included in Table 5 because they were not scale variables. We also performed PCA on the factors influencing medical outcomes to clarify the rationale behind the two hypotheses developed from this study. A total of 13 survey questions were selected from the three survey categories, “Hospital Management,” “Doctor’s Intentions,” and “Relationship with Patients,” for the use as scale variables in PCA with the exception of X6, “Willingness to disclose patient’s medical information.” The doctors were then classified into four groups according to the combinations of the positive and negative loadings of the selected principal components. Analysis of variance ANOVA was also carried out to determine whether there was a statistically significant difference in the responses to X21, “Effect of IC on disease prognosis,” and X22, “Influence of IC on patient’s quality of life,” under “Medical Outcomes” section depending on the doctor’s intent (i.e., PC 1, “Emphasis on the hospitality value,” and PC 3, “Intent to encourage patient’s self-determination”). The Tukey method, considered the most common multiple comparison method, was employed to demonstrate the rationale behind the hypotheses. Statistical Analysis: Excel‐Toukei 2008 (Social Survey Research Information Co., Ltd. Software Products Group, Tokyo, Japan) was used for statistical analysis. A P-value of less than 0.05 was considered statistically significant in discriminant analysis. Results A total of 250 questionnaires were distributed and 168 were collected. Among them, we analyzed 165 responses that contained effective answers. Thus, the effective reply rate was 66.0%. The demographic data of the respondents were as follows (See Table 2). The sex ratio of the 165 doctors was 81.2% men and 17.6% women. Among the respondents, 39.4% were in their 30s, which was the most common age group of the doctors we investigated, and 29.7% were in their 40s. 41.3% of the respondents have been working as a doctor for less than ten years, 26 J Med Dent Sci K. Yoshihara et al. Table 2. Demographic data of respondents Table 3. Specialties of the respondents. Sex Internal medicine Psychosomatic medicine Male: 81.2% Female: 17.6% No answer: 1.2% Age 20-29 years old: 15.2% 30-39 years old: 39.4% 40-49 years old: 29.7% 50-59 years old: 12.1% 60-69 years old: 3.0% No answer: 0.6% Less than 5 years: 15.8% Number of years More than 5 years less than 10 years: 25.5% practicing as a More than 10 years less than 15 years: 17.6% doctor More than 15 years less than 20 years: 13.9% More than 20 years: 26.7% No answer: 0.6% Number of beds in Less than 20 beds: 7.9% More than 200 beds less than 500 beds: 21.8% the hospital they More than 500 beds less than 700 beds: 10.9% work at More than 700 beds less than 900 beds: 41.8% More than 900 beds: 13.9% No answer: 3.6% Number of staffs at Less than 50 people: 3.0% More than 50 people less than 100 people: 6.1% the hospital they More than 100 people less than 200 people: 1.2% work at More than 200 people less than 300 people: 1.2% More than 300 people less than 400 people: 2.4% More than 400 people less than 500 people: 3.0% More than 500 people: 69.8% No answer: 13.3% and doctors working in the hospitals with 700 to 900 beds were most common (41.8%). The most common specialty was general surgery (16.4%), followed by orthopedics (10.9%), internal medicine, and ophthalmology (9.7% in both) (See Table 3). The correlation coefficient between X14 and X21 was 0.24 (p < 0.01), and that between X14 and X22 was also 0.24 (p < 0.01). From the result of the correlation analysis, the following two hypotheses were identified (See Table 4). The first hypothesis is that “the doctor’s belief that the patient’s self-determination is possible promotes cure of illness by obtaining IC.” The second hypothesis is that “the doctor’s belief that the patient’s self-determination is possible has a positive influence on patient’s quality of life by obtaining IC.” A linear discriminant function was derived to distinguish between the two groups: the doctors who think patient’s self-determination is possible and those who do not, and “Agreement or rejection of the concept of IC” has been identified as a key influencing factor (See Table 5). Each principal component (PC) was then interpreted based on their respective loadings. PC 1 had a large Gastrointestinal Cardiovascular 9.7% - 3.6% 2.4% Neurosurgery 1.2% Cardiovascular surgery Plastic and cosmetic surgery 0.6% - Obstetrics and gynecology 7.9% Diabetes - Urology 4.2% Geriatric medicine - Pediatrics Ear, Nose and Throat (ENT) Dermatology Ophthalmology Dentistry 4.8% Rheumatology 2.4% Hematology Respiratory Nephrology 1.2% 4.2% 0.6% Neurology General Surgery Orthopedics 1.8% 16.4% 10.9% Total 6.7% 0.6% 9.7% - Anesthesiology Others No answer 4.2% 6.1% 0.6% 100.0% Table 4. Correlation between the doctor’s belief on possibility of patient’s self-determination and positive influences of IC on the treatment of diseases X5 Agreement or rejection of the concept of IC X9 Level of conviction about future healthcare system X11 Extent of information disclosure to the patients X14 Possibility of patient’s self-determination X21 Effect of IC on disease prognosis X22 Influence of IC on patient’s quality of life 0.20** 0.22** 0.08 0.05 -0.07 0.02 0.24** 0.24** N=165, Level of significance **p < 0.01 positive loading for the communication-related variables such as “Posture of acceptance toward patients during IC enforcement,” “Level of friendliness toward patients,” “Level of generosity towards patients,” “Emphasis on empathy and sense of unity with patients when obtaining IC,” and “Emphasis on building a trusting relationship with patients.” These loads can be seen as indicative of “Emphasis on the hospitality value.” PC 2 had a large positive loading for the variables such as “Organizational awareness of IC,” “Practical application of IC,” and “Communication between hospital personnel,” which can be interpreted as “Hospital’s emphasis on the service value.” PC 3 had a relatively large positive loading for the variables such as “Agreement or rejection of the concept of IC” and “Possibility of patient’s self-determination.” Since the notion of IC is to 27 Patient’s self-determination and medical outcomes Table 5. Discriminant analysis for influencing factors separating the doctors who think patient’s self-determination is possible and those who do not. distinction coefficient -0.097 -0.212 -0.724 -0.282 -0.11 -0.084 -0.286 0.06 X2 Practical application of IC X3 Adequacy of time for IC X5 Agreement or rejection of the concept of IC X6 Willingness to disclose patient’s medical information X8 Level of practice of hospitality X18 Emphasis on empathy and the sense of unity with the patients when obtaining IC X19 Emphasis on building a trusting relationship with patients X20 Desirable relationship between doctor and patient P value 0.704 0.31 0.014 * 0.416 0.602 0.759 0.447 0.747 N=165, Level of significance *p < 0.05 Table 6. PCA about 13 items. X1 Organizational awareness of IC X2 Practical application of IC X3 Adequacy of time for IC X4 Communication between hospital personnel X5 Agreement or rejection of the concept of IC X9 Level of conviction about future healthcare system X11 Extent of information disclosure to patients X14 Possibility of patient’s self-determination X15 Posture of acceptance toward patients during IC enforcement X16 Level of friendliness toward patients X17 Level of generosity toward patients X18 Emphasis on empathy and the sense of unity with patients when obtaining IC X19 Emphasis on building a trusting relationship with patients explanatory power PC 1 0.35 0.26 0.19 0.12 0.27 0.26 0.04 0.24 0.54 0.65 0.71 0.75 0.64 20.16 PC 2 0.71 0.69 0.42 0.58 0.27 -0.15 0.17 0.19 0.11 -0.37 -0.22 -0.25 -0.23 15.21 PC 3 -0.28 -0.33 0.26 0.15 0.61 0.03 -0.38 0.68 -0.26 -0.14 -0.06 0.1 0.01 10.56 PC 4 -0.22 -0.34 0.51 0.39 -0.12 0.58 0.19 -0.32 0.23 -0.12 -0.24 0.05 0.09 9.21 PC 5 0.02 -0.01 -0.43 -0.08 0.42 0.39 0.69 0.07 -0.2 -0.19 0.04 -0.06 0.1 8.43 N=165. Five PCs with eigenvalues greater than one were selected with a cumulative explanatory power of 63.6%. The figures indicate the positive or negative loading of each principal component (PC). Figures exceeding the absolute value of 0.5 are represented in bold. support the patient in making decisions, these loadings can be construed as “Intent to encourage patient’s selfdetermination” (See Table 6). Difference between means was then determined using a t-test to identify the correlation between PC 3, “Intent to encourage patient’s self-determination,” and “Medical Outcomes” specified in the hypotheses. Of the five PCs identified as a result of PCA, PC 1, “Emphasis on the hospitality value,” and PC 3, “Intent to encourage patient’s self-determination,” were used to classify doctors into the following four groups according to their positive or negative loading: Group1 (+ +)) Positive loading (+) for both PC 1 and PC 3; Group 2 (+ -)) Positive loading (+) for PC 1, and negative loading (-) for PC 3; Group3 (- +)) Negative loading (-) for PC 1, and positive loading (+) for PC 3; Group 4 (- -)) Negative loading (-) for both PC 1 and PC 3. Statistical testing was then done to determine whether there were any significant intergroup differences in their responses to X21, “Effect of IC on disease prognosis,” and X22, “Influence of IC on patient’s quality of life” (See Table 7). One-way ANOVA was done to investigate the influence of the intentions of doctor on responses to X21, “Effect of IC on disease prognosis.” The results showed that the doctor’s intent did indeed have a significant effect on the responses (F (3,155) = 3.7300; p < 0.05). Similarly, ANOVA was performed to determine the influence of the intentions of doctor on X22, “Influence of IC on patient’s quality of life”. The results showed that the doctor’s intent significantly influenced the responses (F (3,155) = 4.0155; p < 0.01). Multiple comparison test (Tukey) revealed a significant difference in the responses to X21 and X22 between Group 1 (+ +) and Group 4 (- -) (See Table 8). These findings demonstrated that doctors with a high level of intention to emphasize the hospitality value and 28 Table 7. Descriptive statistics for X21, “Effect of IC on disease prognosis.” and X22, “Influence of IC on patient’s quality of life.” Sample size [+ +] Group 1 [+ -] Group 2 [- +] Group 3 [- -] Group 4 J Med Dent Sci K. Yoshihara et al. 39 38 48 34 Mean X21 X22 3.897 4.000 3.763 3.684 3.750 3.813 3.235 3.294 SD X21 X22 0.718 0.795 0.943 0.989 0.729 0.867 1.208 0.938 N=165. to encourage patient’s self-determination tended to have a more positive influence on the “Effect of IC on disease prognosis” and “Influence of IC on patient’s quality of life.” Discussion The statistical results of this study supported the following two hypotheses: 1) The doctor’s belief that the patient’s self-determination is possible promotes cure of illness by obtaining IC and 2) The doctor’s belief that the patient’s self-determination is possible has a positive influence on patient’s quality of life by obtaining IC. These findings demonstrate that a doctor’s attitude towards PC 1, “Emphasis on the hospitality value,” and PC 3, “Intent to encourage patient’s self-determination,” strongly influences his or her perception of the “Effect of IC on disease prognosis” and “Influence of IC on patient’s quality of life,” with PC 3 having a larger influence than PC 1. These are the most essential elements of IC because its concept supports the patient’s self-determination, and a doctor and a patient should have an interdependent relationship, where there is a synergy effect on the cure of illnesses. The results of this study also suggest that all doctors must have a universal understanding of the concept of IC in order for IC to function as intended. As shown in Table 5, the sufficient distinction coefficient (-0.724) was significant enough to conclude that “Agreement or rejection of the concept of IC” is the key influencing factor under a significance level of 5%. Thus, the decisive factor that distinguished the doctors who think that the patient’s self-determination is possible and those who do not was whether they agree or reject the concept of IC. It is important to recognize that this Table 8. Post-ANOVA multiple comparison test (Tukey) of X21 “Effect of IC on disease prognosis” and X22 “Influence of IC on patient’s quality of life” Set of group 1 1 1 2 2 3 2 3 4 3 4 4 X21 Evaluation P value 0.9134 0.8718 0.0109 * 0.9999 0.0660 0.0559 X22 Evaluation P value 0.4118 0.7657 0.0054 ** 0.9118 0.2562 0.0520 N=165, Significance level: * 95% ** 99% factor influences the effect of obtaining IC in turn. The result indicated that the group of doctors thinking that the patient’s self-determination is possible showed characteristics such as empathy, a sense of unity, and confidence in their relationship with patients. They had a tendency to improve the effect of IC on the cure of diseases by building a relationship that encourages the patients themselves to decide the method of treatment. The findings of the present study demonstrate that emphasizing the hospitality value is an effective way to embody the principle of IC. In this regard, we believe that our study has contributed to promote the proper use of IC within health care system in Japan. IC has conventionally been viewed as a patient service, but our study has shown that it cannot be defined solely from the perspective of service. Providing care under the service value may be a prerequisite to creating the hospitality value, but it is not enough to generate patient satisfaction because it is one-way direction and is based on the idea of enhancing the efficiency. There is an inherent risk that doctors take an obligatory and defensive approach under the service value. The group of doctors who think the patient’s self-determination is impossible was characterized by the tendency to place great importance on accountability regarding the risks involved in the treatment, side effects, and negative consequences. The findings revealed that their ideal relationship with their patients is a functional relationship in which the doctor is a provider and the patient is a recipient. The group of doctors in the present study who believed that patients were capable of making decisions regarding their own treatment tended to use IC effectively as a patient’s self-determination tool. They were obtaining IC in the knowledge that their relationship with their patient is based on a sense of empathy, community, and trust, as shown in Table 5. These doctors also had an intention to provide patients with various medical information Patient’s self-determination and medical outcomes and alternatives to facilitate informed decision-making. Through efforts such as this, doctors can create joy and delight beyond satisfaction in patients by empowering them to make their own decisions, and it will inevitably lead to the creation of the hospitality value. Needless to say, when the doctor is obtaining IC from the patient, it is important to ensure that the patient makes a decision with a clear understanding of the treatment risks, side effects, and prognosis that are predicted. However, by changing their current awareness and attitudes, doctors can encourage patients to become more independent and autonomic in their self-determination. The study results highlight the benefits of shifting from the conventional service-based approach of IC, where the doctor simply explains to the patient in oneway direction, to a more sympathetic approach where the doctor considers the patient’s wishes and feelings. In other words, the findings suggest that implementing IC with a greater emphasis on the hospitality value may support to alleviate patients’ concerns and build a trusting relationship with them17-19. These outcomes are compatible with the fundamental philosophy of IC as well as the hospitality concept. The creation and delivery of the hospitality would not only lead to patient satisfaction, but also create joy and delight in them and has an added benefit of enhancing the capacity of the hospital personnel who apply the hospitality value into their practice 5, 13. Thus, emphasizing the hospitality value constitutes an incentive for management to develop a hospital that is distinct from other facilities. The findings showed that the group of doctors who believed in the patient’s self-determination ability saw IC as a valid and meaningful tool that has an impact on patient’s healing and quality of life. The results also suggest that the doctors who adopt a more positive attitude toward IC may experience a drastic improvement in the problems they face such as patient adherence and medical litigation 20-23 . An effective use of IC may even have a positive influence on the medical expense as well as the burden and shortage of health care providers by enabling more effective use of patient resources as the relationship with patients develop 24. As a results in Table 8, a significant difference in the responses to X21 and X22 was also seen between Group 3(- +) and Group 4(- -). These findings demonstrated that doctors with a low level of intention to emphasize the hospitality value and a high level of intention to encourage patient’s self-determination tended to have a more positive influence on the “Effect of IC on disease prognosis” and “Influence of IC on 29 patient’s quality of life” than the doctors who had low level for both PCs. In future research, we will attempt to elucidate the contents of Group 3(- +) and improve the accuracy of the hypotheses supported in this study by conducting interview surveys. We also hope to identify the benefits of patient participation in the creation of the hospitality value. The development of theoretical and practical guidance on the use of IC in health care settings is a pressing issue, and we hope that this study will be a beneficial aid in achieving this objective. Acknowledgements We are grateful to Professor Yohichi Kataoka (Mejiro University Graduate School of Business Administration) for supporting the study, and Mrs. Kanako Maeda (Tokyo Medical and Dental University) for preparing the manuscript. We wish to thank many people who assisted with the questionnaire survey. We received from Mejiro University special research funds for three years from 2008. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 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HOSPITALITY. The twelfth Japanese Academic Society of hospitality management (in Japanese). 2005. Charles W Lidz, Loren H Roth. The signed form-informed consent?. In: Robert F, Boruch, et al, editors. Solutions to ethical and legal problems in social research. New York: Academic Press;1983. p. 145-57. 31 Patient’s self-determination and medical outcomes Appendix 1. Cross tabulation of answers to the 12 selected items by the doctors who think patient’s self-determination is possible and those who do not. Possibility of self-determination by the patient Total Possible Impossible (n=165) (n=101) (n=64) IC and doctor’s Intentions X5 Agreement or rejection of the concept of IC “Strongly agree” 49%(81) 59% (60) 33%(21) X6 Willingness to disclose patient’s medical information “I Strongly honor such requests” 56%(93) 61% (62) 48% (31) X7 Level of recognition/understanding of hospitality “I Know the word but I do not fully understand what is meant by hospitality” 11% (18) 6% (6) 19% (12) X10 Point of emphasis in the explanation to patients “Details, aims, necessity, rationale and efficacy of the alternative treatments” 16% (27) 23% (23) 6% (4) “Aims and details of testing” 50% (82) 44% (44) 59% (38) “Risks and side effects associated with the treatments” 78%(129) 72% (73) 88% (56) “Aftereffects associated with the treatments” “Understanding the patientʼs wishes, feelings and thoughts” 27% (44) 44% (73) 23% (23) 33% (21) 50% (50) 36% (23) “I want patients to show a capacity for understanding and acceptance for what their physicians have to say” 50% (82) 55% (56) 41% (26) “I want patients to develop an understanding of the conceivable risks” 52% (85) 45% (45) 63% (40) X18 Emphasis on empathy and the sense of unity with the patients when obtaining IC “Strongly agree” 22% (37) 28% (28) 14% (9) X19 Emphasis on building a trusting relationship with patients “Strongly agree” 47% (78) 52% (53) 39% (25) X20 Desirable relationship between doctor and patient “The physician and the patient maintain a relationship in which the doctor informs the patient his options and the patient makes his/ her decision regarding the treatment method” 39% (64) 46% (46) 28% (18) “The physician and the patient maintain a functional relationship in which the doctor provides the patient with medical treatment techniques and so forth, while the patient assumes the role of accepting what the doctor provides” 20% (33) 13% (13) 31% (20) “Somewhat agree” 45% (74) 52% (53) 33% (21) X22 Influence of IC on patient’s quality of life “It has a moderate impact” 38% (62) 43% (43) 30% (19) X23 Positive effect s of IC “Fosters an attitude that conveys a respect for the decisions made by patients” 62%(102) 68% (68) 53% (34) X12 Preparations before carrying out IC X13 Expectations for the patients at the time of IC enforcement IC and the relationship with the Patients IC and medical outcomes X21 Effect of IC on disease prognosis N=165. The numbers in parentheses express the actual numbers, and the underlines indicate the group that has higher percentage compared to total. Next, the respondents were divided into two groups based on their response to the possibility of the patient’s self-determination (X14), and the cross tabulation analysis was performed to examine whether the difference in their perspectives would be reflected in their answers to other items (See Appendix 1). The cross tabulation analysis was performed about all questions. The table shows only the questions in which the higher percentage of doctors in either group has chosen the particular answer than the percentage of the total number, and they are X5, 6, 7, 10, 12, 13, 18, 19, 20, 21, 22, and 23. These questions were supposed to be the characteristic items that indicated a conspicuous gap in the cross tabulation analysis. 32 K. Yoshihara et al. J Med Dent Sci Patient’s self-determination and medical outcomes 33 34 K. Yoshihara et al. J Med Dent Sci Patient’s self-determination and medical outcomes 35 36 K. Yoshihara et al. J Med Dent Sci Patient’s self-determination and medical outcomes 37 38 K. Yoshihara et al. J Med Dent Sci Patient’s self-determination and medical outcomes 39 40 K. Yoshihara et al. J Med Dent Sci