Diabetes Care, 2013, 01, e66─e67

Association between fasting blood glucose and carotid intima-media thickness of polycystic ovary syndrome patients with normal glucose tolerance

KUKHUISON, NAM KYOO LIM, HYE WON CHUNG, KYUNGAH JEONG, WOOK BUM PYUN, KI YOUNG LEE, MIN JOU KIM, HYUN-YOUNG PARK

Abstract

Background: Shift work has been hypothesized as a risk factor for obesity. In this study, we investigated the association between current shift work and body mass index (BMI) among female nurses in Korea. The relationship between duration of shift work and BMI of the participants was also evaluated.
Methods: This cross-sectional survey evaluated participants in the Korean Nurses’ Survey, conducted from October to December 2011, using web-based self-administered questionnaires. A total of 9,989 nurses were included among 10,000 who registered on the survey web site (5,287 shift workers and 4,702 non-shift workers). Current shift workers were divided into tertiles of shift work duration (0.08？3.00 years, n = 1,732; 3.08？6.75 years, n = 1,731; and 6.83？38.00 years, n = 1,686). The BMI thresholds of overweight and obesity were ≥23 kg/m2 and ≥25 kg/m2, respectively. Data were analyzed using SPSS software.
Results: Mean participant age was 33.2 ± 8.6 years and the mean BMI was 20.9 ± 2.5 kg/m2. There were statistically significant differences in current smoking status, regular drinking habit, dietary habits, regular exercise, sleep problems and self-perceived health status according to duration of shift work. The overall prevalence of overweight/obesity (18.6%) and obesity (7.4%) increased significantly as shift work duration increased from the lowest to highest tertile (P for trend <0.001). Multivariate logistic regression analysis revealed no association between current shift work and BMI. However, after adjusting for potential confounders, the participants with the longest duration of shift work were 1.63 (95% CI, 1.22？2.17) times more likely to be overweight or obese than those with the shortest duration. There was a significant positive association between obesity and shift work duration in the unadjusted analysis; however, it was attenuated and no longer significant in the multivariate model.
Conclusions: The duration of shift work was positively associated with prevalence of overweight/obesity in nurses in Korea. Although these findings need to be confirmed in prospective studies, they suggest that special attention should be paid to female nurses with a long duration of shift work.

• ISBN or ISSN: 0149-5992

• 본 연구는 질병관리본부 연구개발과제(과제번호 2012-N63001-00) 연구비를 지원받아 수행되었습니다.
• This research was supported by a fund(code 2012-N63001-00) by Research of Korea Centers for Disease Control and Prevention.