Impact of changes in mode of travel to work on changes in body mass index: evidence from the British Household Panel Survey. Issue 8 (7th May 2015)

• Record Type: Journal Article
• Authors: Martin, Adam; Panter, Jenna; Suhrcke, Marc; Ogilvie, David
• Is Part Of: Journal of epidemiology and community health. Volume 69:Issue 8(2015)
• Page Start: 753
• Page End: 761
• Publication Date: 2015-05-07
• Subjects: PHYSICAL ACTIVITY -- WORKPLACE -- OBESITY; Public health -- Periodicals; Epidemiology -- Periodicals; 614.4
• DOI: 10.1136/jech-2014-205211
• Languages: English
• ISSNs: 0143-005X

Abstract

Abstract : Background: Active commuting is associated with various health benefits, but little is known about its causal relationship with body mass index (BMI). Methods: We used cohort data from three consecutive annual waves of the British Household Panel Survey, a longitudinal study of nationally representative households, in 2004/2005 (n=15 791), 2005/2006 and 2006/2007. Participants selected for the analyses (n=4056) reported their usual main mode of travel to work at each time point. Self-reported height and weight were used to derive BMI at baseline and after 2 years. Multivariable linear regression analyses were used to assess associations between switching to and from active modes of travel (over 1 and 2 years) and change in BMI (over 2 years) and to assess dose–response relationships. Results: After adjustment for socioeconomic and health-related covariates, the first analysis (n=3269) showed that switching from private motor transport to active travel or public transport (n=179) was associated with a significant reduction in BMI compared with continued private motor vehicle use (n=3090; −0.32 kg/m 2, 95% CI −0.60 to −0.05). Larger adjusted effect sizes were associated with switching to active travel (n=109; −0.45 kg/m 2, −0.78 to −0.11), particularly among those who switched within the first year and those with the longest journeys. The second analysis (n=787) showed that switching from active travel or public transport to private motor transport was associated with a significant increase in BMI (0.34 kg/m 2, 0.05 to 0.64). Conclusions: Interventions to enable commuters to switch from private motor transport to more active modes of travel could contribute to reducing population mean BMI.