A follow-up study of job strain and heart disease among males in the NHANES1 population.
Steenland-K; Johnson-J; Nowlin-S
Am J Ind Med 1997 Feb; 31(2):256-260
The relationship between job strain and heart disease was evaluated via the National Health and Nutrition Survey 1 (NHANES1) completed by a sample of US workers from 1971 to 1975. Because of the lack of job strain scores for women, the study was restricted to 3,575 men with no history of heart disease. Analyses were conducted using Cox regression by means of SAS PHREG. Two principal scores were analyzed: job control (decision authority and latitude) and job demand. Job control and job demand were strongly and positively correlated, and both were positively correlated with education and income, and negatively correlated with systolic blood pressure. Job demand was negatively correlated with age, but job control showed no correlation. Job demand remained highly correlated with job control after adjusting for education, age, and race for white and blue collar workers. Blue collar workers in high control and high demand jobs had a significantly decreased risk of heart disease compared with other blue collar workers. The same trend for white collar workers did not appear. The authors conclude that there is no evidence from this study of an increased risk of heart disease for those with high strain jobs, however, those with the highest job control may have a significantly decreased risk of heart disease. The authors suggest that the variable of job demand should be measured in future studies.
NIOSH-Author; Job-stress; Mental-stress; Emotional-stress; Psychological-stress; Cardiovascular-system-disease; Cardiovascular-system-disorders;
Author Keywords: job strain; job stress; heart disease; NHANES1
Kyle Steenland, PhD, National Institute for Occupational Safety and Health (NIOSH), 4676 Columbia Parkway, Cincinnati, Ohio 45226
American Journal of Industrial Medicine