Types of Usual Source of Care and Patient-Centered Communications / 가정의학회지

Background@#A usual source of care (USC) is related to longitudinal and personalized services, which are attributes of primary care. Patient-centered communication, an important element of patient-centered care, helps physicians understand health problems from a patient’s point of view. We analyzed the association between USC and patient-centered communication. @*Methods@#Data from the Korea Health Panel 2018 were used in the analysis. Patient-centered communication scores were obtained by combining the four communication-related questionnaire items. Usual source of care types were categorized based on responses to two questionnaire items: no USC, a place without a regular doctor and with a regular doctor. Multiple logistic regression analysis was used to adjust for confounders. @*Results@#Good communication rate was higher for those with a regular doctor (71.8%) than for those with no USC (61.8%) or a place only (61.5%). Those with a regular doctor had better communication (odds ratio, 1.49 for individuals with poor/moderate health, and 2.08 for those with good health) than those without a USC after adjusting for confounders. In terms of communication, no difference was observed between individuals with no USC and those with a place only. @*Conclusion@#Having a regular doctor promotes communication between patients and doctors. Good communication may be a mediator between having a regular doctor and related beneficial outcomes. Better communication by having a regular doctor, along with several other benefits identified in previous studies suggests the need for a health policy that encourages individuals to have regular doctors.

Association between Types of Usual Source of Care and User Perception of Overall Health Care Service Quality in Korea / 가정의학회지

BACKGROUND: Patients' perceptions of care tend to correlate with the quality of care provided. Different health care systems and service environments may show different associations between types of usual source of care (USC) and overall service quality assessment. We attempted to analyze this association as a benefit of having a USC. METHODS: This study used the 2012 Korea Health Panel data version 1.1 as representative national household survey data. The total number of subjects aged 18 years or more was 12,708. The number of subjects in the final analysis was 10,665. Multiple logistic regression analysis was used to assess the association between types of USC and overall health care service quality. The main outcome variable was users' ratings of the quality of health care service. RESULTS: People having a usual doctor (n=1,796) were more likely to positively assess the quality of health care they received than those not having a USC (n=7,920; odds ratio [OR], 1.39; 95% confidence interval [CI], 1.20–1.60) or with those having only a place as a USC without a usual doctor (n=949; OR, 1.29; 95% CI, 1.05–1.58) after adjustment for demographic characteristics and health-related variables. CONCLUSION: People having a usual doctor rated overall health care service quality as high, which might be due to benefits of primary care attributes related to usual doctors. Further studies are needed to elucidate the causal relationship. This finding implies that health policies encouraging people to have a usual doctor are needed in Korea.

Effect of Having a Usual Source of Care on Medical Expenses – Using the Korea Health Panel Data

BACKGROUND: There is a controversy about the effect of having a usual source of care on medical expenses. Although many studies have shown lower medical expenses in a group with a usual source of care, some have shown higher medical expenses in such a group. This study aimed to empirically demonstrate the effect of having a usual source of care on medical expenses. METHODS: The participants included those aged 20 years and older who responded to the questionnaire about “having a usual source of care” from the Korean Health Panel Data of 2012, 2013, and 2016 (6,120; 6,593; and 7,598 respectively). Those who responded with “I do not get sick easily” or “I rarely visit medical institutions” as the reasons for not having a usual source of care were excluded. The panel regression with random effects model was performed to analyze the effect of having a usual source of care on medical expenses. RESULTS: The group having a usual source of care spent 20% less on inpatient expenses and 25% less on clinic expenses than the group without a usual source of care. Particularly, the group having a clinic-level usual source of care spent 12% less on total medical expenses, 9% less on outpatient expenses, 35% less on inpatient expenses, and 74% less on hospital expenses, but 29% more on clinic expenses than the group without a usual source of care. CONCLUSION: This study confirmed that medical expenses decreased in the group with a usual source of care, especially a clinic-level usual source of care (USC), than in the group without a usual source of care. Encouraging people to have a clinic-level USC can control excessive medical expenses and induce desirable medical care utilization.

Emergency Department Visits Can Be Reduced by Having a Regular Doctor for Adults with Diabetes Mellitus: Secondary Analysis of 2013 Korea Health Panel Data

Chronic diseases pose a major challenge to population health worldwide. Diabetes is a major chronic disease that is managed overwhelmingly in primary care. There is an increasing recognition of the role that primary care physicians play to achieve high-quality care for patients with diabetes. By analyzing 2013 Korean Health Panel data, the authors aimed to determine the current status of having a regular doctor (RD) for adults (aged 18 years or older) with diabetes. In addition, the association of having a RD with the experience of emergency department (ED) visits was determined in this study. Among adults with diabetes, those with RD accounted for 41.0%. The older the age group and the higher the Charlson comorbidity index score, the higher the percentage of adults with diabetes had RD. Even for those with RD, coordination of care was very poor (positive answer: 27.1%). After adjustment for confounding variables, those having (vs. not having) a RD (odds ratio [OR], 0.57; 95% confidence interval [CI], 0.35–0.94), especially those whose RDs delivered good comprehensiveness of care (OR, 0.47; 95% CI, 0.26–0.84) or worked at a primary care clinic (OR, 0.43; 95% CI, 0.22–0.81), and those whose longitudinal relationship with a RD was 5 years or less (OR, 0.45; 95% CI, 0.22–0.91) were less likely to have ED visits within the last year. In conclusion, health care policies that promote having a RD who delivers high-quality primary care could decrease unnecessary ED visits by diabetic adults. This can partly reduce ED overcrowding in Korea.

The Korean guideline for lung cancer screening

Lung cancer is the leading cause of cancer death in many countries, including Korea. The majority of patients are inoperable at the time of diagnosis because symptoms are typically manifested at an advanced stage. A recent large clinical trial demonstrated significant reduction in lung cancer mortality by using low dose computed tomography (LDCT) screening. A Korean multisociety collaborative committee systematically reviewed the evidences regarding the benefits and harms of lung cancer screening, and developed an evidence-based clinical guideline. There is high-level evidence that annual screening with LDCT can reduce lung cancer mortality and all-cause mortality of high-risk individuals. The benefits of LDCT screening are modestly higher than the harms. Annual LDCT screening should be recommended to current smokers and ex-smokers (if less than 15 years have elapsed after smoking cessation) who are aged 55 to 74 years with 30 pack-years or more of smoking-history. LDCT can discover non-calcified lung nodules in 20 to 53% of the screened population, depending on the nodule positivity criteria. Individuals may undergo regular LDCT follow-up or invasive diagnostic procedures that lead to complications. Radiation-associated malignancies associated with repetitive LDCT, as well as overdiagnosis, should be considered the harms of screening. LDCT should be performed in qualified hospitals and interpreted by expert radiologists. Education and actions to stop smoking must be offered to current smokers. Chest radiograph, sputum cytology at regular intervals, and serum tumor markers should not be used as screening methods. These guidelines may be amended based on several large ongoing clinical trial results.

The Effect of Videotaping Students' Interviews with Patients for Interview Skill Education / 가정의학회지

BACKGROUND: The importance of communication between patients and physicians has been proven in many previous studies. The authors analyzed the effect of interview skill education through videotapes which recorded students' interviews with real patients in the outpatient department of family medicine. METHODS: This study was conducted with all students who chose the elective course of family medicine and one randomly selected student every week from an 'infectious internal medicine' class at Dongguk University Ilsan Hospital during the period from December 2008 to March 2011. All students performed a preliminary examination of a new patient at the outpatient department of family medicine. All consultations were videotaped. Feedback to the student was given on the same day by viewing the videotape together. After feedback, all students performed another preliminary examination of one new patient at the department of family medicine the same week. Three family medicine residents scored all videotapes using 10-item interview skill checklists. Many parts of the checklists were modified using the Arizona Clinical Interview Rating Scales. RESULTS: Thirty-three students participated. Of 10 items, nine showed increased scores after feedback. There was a significant change in four items after feedback: 'type of question' (before 2.36 +/- 0.60, after 2.73 +/- 0.72), 'timeline' (before 2.82 +/- 0.68, after 3.18 +/- 0.73), 'positive verbal reinforcement' (before 2.24 +/- 0.56, after 2.61 +/- 0.90), and the total score (before 21.70 +/- 2.62, after 23.39 +/- 3.13) (P < 0.05). CONCLUSION: Giving feedback to medical school students on medical interview skills using videotapes of students' preliminary consultations with real patients in outpatient settings, was effective in improving the interview areas of 'type of question,' 'timeline,' 'positive verbal reinforcement,' and the total interview scores.

Primary care research in South Korea: its importance and enhancing strategies for enhancement

Lively discussion has been underway regarding primary care in South Korea as an alternative medical policy in the face of rising medical costs and health care disparities. However, the lack of research about primary care in South Korea makes it difficult to move policymakers, so it is time to enhance primary care research in South Korea. Primary care research can be defined as research directed toward the better understanding and practice of the primary care function. Primary care research traditionally has included basic research, clinical research, health services research related to primary care, health systems research, and research on primary care training; and each field is complementary. In primary care research, participation of primary care physicians is essential because primary care research is different from other conventional studies of disease prevalence, patient characteristics, diagnostic methods, and the treatment environment. Primary care research findings in other countries cannot be applied to South Korea as the characteristics of the health system and medical practice are different. To enhance the research on primary care in South Korea, financial assistance, promoting the research capacity of primary care physicians, and more attention from primary care physicians to research are needed.

Association of the Length of Doctor-Patient Relationship with Primary Care Quality in Seven Family Practices in Korea

Countries with historically unlimited patient choice of medical provider, such as Korea, have been promoting rational health care pathways. Factors related to the length of doctor-patient relationship (DPR) for enhancing primary care in those countries should be studied. Participants were patients who had visited their family practices on six or more occasions over a period of more than 6 months. Five domains (21 items) of the Korean Primary Care Assessment Tool (first contact, coordination function, comprehensiveness, family/community orientation, and personalized care) and general questions were administered in the waiting rooms. From seven practices, the response rate was 83.7% (495/591). The older the age, the lower the income, the shorter the duration of education, the more the number of diseases the patients had, and in provincial cities rather than in Seoul, the longer length of DPR ( > or = 4 yr) was shown. The long-term DPR was associated with total primary care quality score (upper [ > or = 71.4] vs lower [ < 71.4], OR, 1.74; 95% CI, 1.10-2.76), especially with coordination function (OR, 1.01; 95% CI, 1.00-1.02), being adjusted for confounding variables. Strengthening the coordination function may have to be the first consideration in primary care policy in countries like Korea.

The Changes of Confidence, Accuracy and Knowledge of Medical Professionals after the Education for Survival Predictionin Terminally Ill Cancer Patients / 한국호스피스완화의료학회지

PURPOSE: In this study, we evaluated the effects of training for survival prediction of terminally ill patients in terms of medical professionals' confidence, accuracy and knowledge of survival prediction. METHODS: Twenty-nine participants completed a self-administered questionnaire where they scored their confidence, accuracy and knowledge of survival prediction before and after the training session. The training was provided in July 2009 at a university hospital located in Gyeonggi province, Republic of Korea. The participants were instructed by a professor of family medicine specialized in hospice palliative medicine to predict survival of a case using the palliative prognostic score and objective prognostic score. The training was provided in the form of a PowerPoint presentation for 40 minutes. RESULTS: Participants' confidence in survival prediction significantly increased from 4.00+/-1.73 (mean+/-SD) (0~10, visual analogue scale) to 5.83+/-1.71 after the training (P<0.001). Before training, participant's level of confidence significantly correlated with their age (P=0.04). The training significantly improved the correlation between the confidence level and the number of terminal cancer patients whom they have experienced (P=0.005 before training, P=0.017 after training). Participant's accuracy in survival prediction also significantly improved from 14 of 29 (48%) to 27 of 29 (93.1%) (P<0.001). The change in knowledge of survival prediction was too small to be statistically analyzed. CONCLUSION: After training, the confidence and accuracy scores significantly improved. Further study with a greater number of participants is needed to generalize this finding.

Patients' Assessment of Community Primary and Non-primary Care Physicians in Seoul City of South Korea / 가정의학회지

BACKGROUND: It is important to know the current level of primary care performance in order to evaluate and plan for desirable health policy. We tried to compare patient's assessment of primary (family physician, general practitioner, internist, pediatrician, and general surgeon) and non-primary (the other specialties) care physicians. METHODS: Study subjects were physicians of primary care clinics in Seoul. The study subject evaluators were Seoul citizens who were selected by a list-assisted random digit dialing sampling method and who had visited their primary care clinic on six or more occasions over a period of more than 6 months as a usual source of care. The modified version of the Korean Primary Care Assessment Tool was used for the evaluation of primary care performance. The data were collected with the aid of a computer-assisted telephone interview system from June 29 to July 22, 2009. RESULTS: The data on 260 individuals were used for analysis. The mean scores of primary and non-primary care physician group were respectively 1.19 and 0.85 in the comprehensiveness domain, 1.00 and 0.83 in the coordination domain, 1.54 and 1.31 in the family/community orientation, and 1.24 and 0.99 as an average of 3 domains above. The scores in the comprehensiveness domain and the average of 3 domains were significantly higher in the primary than in the nonprimary care physician group. CONCLUSION: Primary care physicians showed superior performance compared to non-primary care physicians in comprehensiveness domain and in the average of comprehensiveness, coordination, and family/community orientation domains.

Association between Primary Care Quality and Health Behaviors in Patients with Essential Hypertension Who Visit a Family Physician as a Usual Source of Care / 가정의학회지

BACKGROUND: Management of hypertension has been performed mainly in primary care institutions, but hypertension control in population is still unsatisfactory. This study was aimed at finding a strategy to improve health promotion activities in patients with hypertension by exploring the association between health behaviors and quality of primary care. METHODS: April to June in 2007, a questionnaire survey of the patients who has a family physician as a usual source of care was conducted for the development of the Korean Primary Care Assessment Tool (KPCAT). In this study, a usual source of care was defined as a physician of the persons who had visited their primary care clinic on six or more occasions over a period of more than 6 months. Of the data collected from 9 private clinics (3 in Seoul and 6 at small cities), cases of the patients who marked on having hypertension were selected. The associations between levels of quality of primary care and socio-demographic characteristics or health behaviors were analysed by Student t-test and chi-square test. Controlling socio-demographic variables, the association between quality of primary care and health behaviors was examined by multiple logistic regression analysis. RESULTS: Among the patients (n = 602) of 9 private clinics who has a family physician as a usual source of care, those who marked on having hypertension were 134. Among 5 domains of the KPCAT, the highest domain in score was personalized care (71.7/100), and the lowest domain in score was coordination function (49.7/100). In patients who gave total average (69.2/100) or more in total primary care score, after adjustment with age, sex, income, education, and duration, odds ratio to have a normal BMI (<25 kg/m2) was 2.53 (P = 0.02), and odds ratio to have a habit drinking an adequate amount of alcohol was 4.32 (P = 0.02). CONCLUSION: The fact that high-quality primary care was associated with good health behaviors in this study suggests that improving quality of primary care by health care reform can make health behaviors more desirable in patients with essential hypertension.

Patient Assessment of Primary Care of Health Cooperative Clinics in South Korea / 가정의학회지

BACKGROUND: In South Korea, major health care problems have been occurred under the structural background that medical services are mainly provided by private medical institutions. Primary health care, which is very crucial in public health, has been overlooked, and is disorganized and fragmented. In the mean time, health cooperative movement was initiated by local residents and medical doctors to overcome health care problems in 1987. We conducted this study to evaluate the role of health cooperative clinics and obtain lessons for the future primary care policy. METHODS: During April to June in 2007, survey was performed by a trained interviewer at the waiting rooms of 3 health cooperative clinics, in the process of development of the Korean Primary Care Assessment Tool (KPCAT). The KPCAT consists of 5 domains (21 items): first contact (5), coordination function (3), comprehensiveness (4), family/community orientation (4), and personalized care (5). Subjects were patients (or guardians) who had visited their health cooperative clinics on six or more occasions over a period of more than 6 months. We compared primary care scores of each domain between members and non-members of health cooperative clinics by student t-test. Effect of having a membership on each primary care domains was examined by multiple regression analysis. RESULTS: Among the participants (N = 100), members of health cooperatives were 48, and non-members 52. Total average scores of 5 primary care domains of the KPCAT were 78.0 +/- 13.5 on 100 point scale. (82.0 +/- 13.1 in members, and 74.3 +/- 13.0 in nonmembers; P = 0.004) Among primary care domains, personalized care was the highest (91.4 +/- 11.0), and coordination function the lowest (61.0 +/- 33.1) in score. Significant differences between members and nonmembers were noted in coordination function (68.9 vs. 53.7, P = 0.021) and comprehensiveness (78.4 vs. 67.2, P = 0.008). These differences were continued after adjusting by multiple regression analysis for socio-demographic variables including age, sex, income, education, number of disease, and duration since the first visit. CONCLUSION: In the health cooperative clinics whose primary care performance has been considered exemplary in the context of health care in South Korea, primary care scores assessed by members were higher than those by non-members. The significant differences of scores in coordination function and comprehensiveness between members and nonmembers suggest that the future primary care policy should be focused to strengthen these two domains of primary care.

Technical Competency of the Esophgogastroduodenoscopy (EGD) during the First 50 EGDs: The Training Result of Family Medicine Residents in a University Hospital / 가정의학회지

BACKGROUND: A previous Korean study recommended minimal 50 cases of Esophgogastroduodenoscopy (EGD) to achieve technical competency, based on director's opinion. Therefore, this study was conducted to evaluate the achievement of EGD's technical skills during the first 50 EGD cases. METHODS: The data were collected from the first 50 EGDs consecutively performed by six family medicine residents trained the EGD procedure in one residency program from 2004 to 2006. Technical competency of the EGD procedure was evaluated in 4 steps divided with anatomical landmarks (the gastroesophageal junction, the antrum, the fundus of the stomach, and the second portion of the duodenum). Authors measured the procedure time of EGDs performed by residents in 4 steps and calculated the rate of success cases satisfied with author's own criteria made by procedure time. RESULTS: The success rate of EGD procedure in all steps was 26.7% at 10 EGDs, but sharply increased to 80.0% at 30 EGDs, reached 88.0% at 50 EGDs. Fail to perform esophageal intubation and retroversion to the fundus of the stomach was none after 30 EGDs. However, in steps from gastroesphageal junction to the antrum of the stomach and from the antrum of the stomach to the second portion of the duodenum, the failure rate kept up less than 10% during the first 50 EGDs. A statistically significant reduction of the procedure time in success cases was observed between 20 and 30 EGDs in all steps. CONCLUSION: The technical competency of EGD was achieved approximately 90% during the first consecutive 50 EGDs.

A Case of Myofascial Pain Syndrome of the Iliopsoas Muscle Undiagnosed for 3 Years with Chronic Abdominal Pain / 가정의학회지

Abdominal pain is one of the most common symptoms we encounter in primary care clinics, and the patients being hospitalized for abdominal pain account for 5-6% of all the inpatients. Careful history taking and physical exams are always necessary for the diagnosis of patients having abdominal pain, because their problems may be transient and insignificant but also can be severe. For the elderly patients, common causes of abdominal pain are unspecific abdominal pain, functional disease, constipation, kidney stone, urinary tract infection, inflammatory bowel disease, biliary tract disease, acute appendicitis, diverticulitis, abdominal aortic aneurysm, peptic ulcer, intestinal obstruction, mesenteric ischemia, malignant tumor, gastroenteritis, etc. and myofacscial pain can also be the cause. We treated an elderly female patient who had suffered severe abdominal pain due to myofascial pain syndrome of the iliopsoas muscle undiagnosed for over 3 years. Therefore we report this case with review of several literatures.

Present Status of Papers on the Primary Care Quality Assessment in Korea / 가정의학회지

BACKGROUND: The analysis of the papers on the primary care quality assessment in Korea was performed to summarize existing papers, estimate the level of primary care quality, and suggest the directions and areas of the future research. METHODS: Primary care quality-related papers were selected via internet web search engines which were Korean Journal of Family Medicine homepage, KMbase, and KoreaMed. Further papers were added after consultation to primary care quality assessment specialists in Korea. RESULTS: The number of related papers was 29. Data collection was done mostly via mail or telephone questionnaire to suppliers, primary care physicians. Papers on resource capacity area were 11, on services delivery 4, on outcome by service 2, and on clinical performance 12. The total primary care score was low. The themes of clinical performance studies were common diseases in Korea. CONCLUSION: Research volume on primary care quality assessment was poor, especially on outcome area. Data collection methods and quality indicators are needed to diverse. Future researches using OECD health care quality indicators are needed to make international comparison possible, which finally contributes to primary care quality improvement in Korea.

A Study on Estimating the Blood Pressure by Using the Pulse Wave Transit Time in Shock Patients Who Received Vasopressor Drugs / 대한구급학회지

BACKGROUND: Blood pressure is clinically used for monitoring shock patients and as a therapeutic indicator for them. Non-invasive blood pressure measurement has weak points such as the use of a cuff and it is a discontinuous measurement. A method of measuring the blood pressure by using the PWTT (pulse wave transit time) has been studied to make up for those weak points. If blood pressure monitoring can be done by using the difference of the PWTT between different points in the body, then this method will be a quite useful to monitor the BP of seriously ill patients. This study aimed to verify whether or not the PWTT has a significant correlation with the blood pressure of shock patients who received vasopressor infusion and whether this method is clinically applicable. METHODS: The study subjects were 20 shock patients who were hospitalized in intensive care units and they had received vasopressor, and we measured the PWTT and we analyzed its correlation with the SBP (systolic blood pressure) and DBP (diastolic blood pressure), as measured by non-invasive monitoring. We then determined the effects of the PWTT on the SBP and DBP. RESULTS: From the results of correlation analysis between the PWTT and the SBP and DBP, the SBP displayed a statistically significant negative correlation with the PWTT of 18 patients, while no significant correlation between the PWTT and DBP was observed. At the same time, from the results of the regression analysis of the blood pressures and the PWTT of each patient, it was found that the PWTT had a negative effect on the SBP of all the patients, except two. CONCLUSIONS: The PWTT has a negative correlation with the SBP of the patients who received vasopressor infusion.

Sexual Desire and Behavior of Residents at Nursing Homes

BACKGROUND: Sexual Problems of the elderly carry weight with the quality of life. Sexual desire and behavior among the aged in the community are well known, but not at nursing homes. METHODS: The study subjects were 131 residents at two nursing homes in Po-hang and Gyeong-ju city from May 1st 2007 to May 22nd 2007. We interviewed the residents using 10-items which were made by investigators. 31 subjects were excluded due to impossible interview. We analyzed 100 subjects. RESULTS: Subjects were 45% men and 55% women, aged 63 to 92 and the mean age was 77 years old. Men and Women felt sexual desires in 64.4% and 18.2%, performed sexual activity in 35.6% and 5.5%. Obscene jokes and patting were common among sexual behaviors. CONCLUSION: Men's sexual desire was much higher than women, but sexual behaviors were rare in all subjects except obscene jokes.

Experience of Internet-based Video Conferences for Residency Training in Rotation Location

Residents in family medicine often have difficulty of gathering to have a conference when they are sent to different hospitals according to training programs. From 2001, for resident conference of family medicine in pohang hospital and gyeongju hospital, dongguk university medical center, an Internet-based video conference system was used for video conferences. The Internet-based video conferences for the members who work at difference hospitals had the same effects as they gather at one place. In addition, the participants could lower the burden of preparing the presentation, listen to the presentation lively, and have a discussion with questions and answers immediately, enhancing the efficiency of conferences. They also could have a sense of affinity as they talk face to face. We reported this case as the application cases and effects of Internet-based video conferences.

Experience of Internet-based Video Conferences for Residency Training in Rotation Location

Residents in family medicine often have difficulty of gathering to have a conference when they are sent to different hospitals according to training programs. From 2001, for resident conference of family medicine in pohang hospital and gyeongju hospital, dongguk university medical center, an Internet-based video conference system was used for video conferences. The Internet-based video conferences for the members who work at difference hospitals had the same effects as they gather at one place. In addition, the participants could lower the burden of preparing the presentation, listen to the presentation lively, and have a discussion with questions and answers immediately, enhancing the efficiency of conferences. They also could have a sense of affinity as they talk face to face. We reported this case as the application cases and effects of Internet-based video conferences.

Alteration of Circadian Diurnal Rhythms of Cardiovascular Parameters by Night Shift Work in 3 Shift Nurses

Background: There are incoherent studies about the effect of night shift work on circadian diurnal rhythms of cardiovascular parameters. Our study aimed to assess the alteration of circadian diurnal rhythms of cardiovascular parameters by night shift work. Methods: We studied 26 healthy nurse volunteers engaged in 3 shift work. From March 16 to April 30, 2006, ABPM (ambulatory blood pressure monitoring) was performed to each nurse two times during the day and night shift. Three nurses were excluded due to pain omdiced by ABPM. Blood pressure and heart rate was monitored every 30 minutes. Paired T-test was used for statistical analysis. Results: The mean arterial pressure, the mean systolic pressure, the mean heart rate and the mean pulse pressure during the overall period were significantly higher in the night shift than the day shift (P-value: <0.05, <0.001, <0.05, and <0.001, respectively). The mean arterial pressure, the mean diastolic pressure and the mean heart rate during in-hospital working period were significantly higher in the day shift (P-value: <0.05, <0.001, and <0.05, respectively). All parameters during the daytime sleep period after the night shift were significantly higher than during the nighttime sleep period after the day shift (P-values: <0.001). Proportional percentile falls of 3 parameters (systolic pressure, diastolic pressure, and heart rate) during the daytime sleep period after the night shift were significantly less than during the nighttime sleep period after the day shift (P-values: <0.001). Conclusion: The night shift work caused significant alteration in homeostasis of autonomic nervous system associated with circadian diurnal rhythms of cardiovascular parameters.