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Author: Courtney, T.K.
Resulting in 4 citations.
1. Lin, Tin-Chi
Courtney, T.K.
Lombardi, David A.
Verma, S.K.
Association Between Sedentary Work and BMI in a U.S. National Longitudinal Survey
American Journal of Preventive Medicine 49,6 (December 2015): e117-e123.
Also: http://www.sciencedirect.com/science/article/pii/S0749379715004146
Cohort(s): NLSY79
Publisher: Elsevier
Keyword(s): Body Mass Index (BMI); Modeling, Fixed Effects; Occupational Information Network (O*NET); Occupations; Physical Activity (see also Exercise); Weight

This study examined the relationship between sitting time at work and BMI using data from a large prospective cohort of U.S. men and women from 2002 to 2010. Initial analyses were performed in 2013, with additional analyses in 2014 and 2015.
Bibliography Citation
Lin, Tin-Chi, T.K. Courtney, David A. Lombardi and S.K. Verma. "Association Between Sedentary Work and BMI in a U.S. National Longitudinal Survey." American Journal of Preventive Medicine 49,6 (December 2015): e117-e123.
2. Lin, Tin-Chi
Courtney, T.K.
Lombardi, David A.
Verma, S.K.
Examining Sedentary Work and BMI Prospectively: Evidence from the National Longitudinal Survey of Youth 1979 (NLSY79)
Presented: San Diego CA, Population Association of America Annual Meeting, April-May 2015
Cohort(s): NLSY79
Publisher: Population Association of America
Keyword(s): Body Mass Index (BMI); Gender Differences; Modeling, Fixed Effects; Occupational Information Network (O*NET); Occupations

Permission to reprint the abstract has not been received from the publisher.

We examined workplace sitting time and body mass index (BMI) prospectively using the National Longitudinal Survey of Youth 1979 (NLSY79). The outcome, BMI, was based on self-reported height and weight. Sitting time was extracted from the Occupational Information Network and linked to NLSY79 participants. We used fixed-effects models and conducted a series of sensitivity analyses. Longer sitting time was significantly associated with higher BMI (p < 0.05) for the overall sample. However, the results differed substantially when analyzed by gender. For men, long sitting time was significantly associated with higher BMI (p < 0.01). For women, the association was not statistically significant. Ours is the first prospective study in an occupationally diverse cohort to document an association between BMI and workplace sitting time among men. Our findings provide further support for initiatives to reduce workplace sitting time as a means of reducing the risk of obesity and related health conditions.
Bibliography Citation
Lin, Tin-Chi, T.K. Courtney, David A. Lombardi and S.K. Verma. "Examining Sedentary Work and BMI Prospectively: Evidence from the National Longitudinal Survey of Youth 1979 (NLSY79)." Presented: San Diego CA, Population Association of America Annual Meeting, April-May 2015.
3. Lin, Tin-Chi
Courtney, T.K.
Lombardi, David A.
Verma, S.K.
Examining Sedentary Work and Weight Gain Prospectively: Evidence from NLSY79
Presented: New Orleans LA, American Public Health Association Annual Meeting and Expo, November 2014
Cohort(s): NLSY79
Publisher: American Public Health Association
Keyword(s): Body Mass Index (BMI); Gender Differences; Occupational Information Network (O*NET); Occupations; Weight

Permission to reprint the abstract has not been received from the publisher.

METHOD: We used BMI as our outcome. The primary explanatory variable was "time spent on sitting", extracted from O*NET (Occupational Information Network) and linked to the main NLSY79 data by occupation. Sitting time consists of five categories, ranging from never (1) to continuously or almost continuously (5). Workplace sitting time at six months prior to interview was used to predict the outcome in each wave. Age, education, weekly frequencies of leisure-time exercise were included as controls in our fixed-effects models.

RESULTS: The overall results suggested that workplace sitting time was significantly associated with higher BMI, however, the result differed substantially by gender. For men, long sitting time was significantly associated with higher BMI (p < 0.05). For women, the association was not significant.

Bibliography Citation
Lin, Tin-Chi, T.K. Courtney, David A. Lombardi and S.K. Verma. "Examining Sedentary Work and Weight Gain Prospectively: Evidence from NLSY79." Presented: New Orleans LA, American Public Health Association Annual Meeting and Expo, November 2014.
4. Lin, Tin-Chi
Verma, S.K.
Courtney, T.K.
Does Obesity Contribute to Non-fatal Occupational Injury? Evidence from the National Longitudinal Survey of Youth
Scandinavian Journal of Work, Environment and Health 39,3 (2013): 268-275.
Also: http://www.sjweh.fi/show_issue.php?issue_id=299
Cohort(s): NLSY79
Publisher: Nordic Association of Occupational Safety and Health (NOROSH)
Keyword(s): Body Mass Index (BMI); Injuries, Workplace; Obesity; Weight

Permission to reprint the abstract has not been received from the publisher.

Objectives The relationship between obesity and occupational injuries remains unclear in the literature due to limitations in study design and sample composition. To better assess the contribution of obesity to occupational injury, we used data from a nationally representative cohort, the National Longitudinal Survey of Youth 1979 (NLSY79) in 1988–2000. Methods We hypothesized that obesity contributes to workplace injury and tested the hypothesis using logistic regression with generalized estimating equations (GEE) and random-effects logistic regression. To ensure temporal precedence of obesity, we used the obesity level in each previous wave and examined its association with injury outcome in each wave from 1988–2000. Obesity was measured as body mass index (BMI) based on self-reported height and weight. Results The GEE analysis showed that obesity was associated with 25% higher odds of workplace injury [odds ratio (OR) 1.25, 95% confidence interval (95% CI) 1.12–1.39; P<0.001). The random-effects regression indicated that obese workers were associated with 29% higher odds of sustaining injuries than those of normal weight (OR 1.29, 95% CI 1.15–1.45; P<0.001). Conclusions Obesity may predispose workers to work-related injury; further research is needed to elucidate the mechanisms.
Bibliography Citation
Lin, Tin-Chi, S.K. Verma and T.K. Courtney. "Does Obesity Contribute to Non-fatal Occupational Injury? Evidence from the National Longitudinal Survey of Youth." Scandinavian Journal of Work, Environment and Health 39,3 (2013): 268-275.