PT - JOURNAL ARTICLE AU - Zia Ul-Haq AU - Daniel F Mackay AU - Daniel Martin AU - Daniel J Smith AU - Jason M R Gill AU - Barbara I Nicholl AU - Breda Cullen AU - Jonathan Evans AU - Beverly Roberts AU - Ian J Deary AU - John Gallacher AU - Matthew Hotopf AU - Nick Craddock AU - Jill P Pell TI - Heaviness, health and happiness: a cross-sectional study of 163066 UK Biobank participants AID - 10.1136/jech-2013-203077 DP - 2014 Apr 01 TA - Journal of Epidemiology and Community Health PG - 340--348 VI - 68 IP - 4 4099 - http://jech.bmj.com/content/68/4/340.short 4100 - http://jech.bmj.com/content/68/4/340.full SO - J Epidemiol Community Health2014 Apr 01; 68 AB - Background Obesity is known to increase the risk of many diseases and reduce overall quality of life. This study examines the relationship with self-reported health (SRH) and happiness. Methods We conducted a cross-sectional study of the 163 066 UK Biobank participants who completed the happiness rating. The association between adiposity and SRH and happiness was examined using logistic regression. SRH was defined as good (excellent, good), or poor (fair, poor). Self-reported happiness was defined as happy (extremely, very, moderately) or unhappy (moderately, very, extremely). Results Poor health was reported by 44 457 (27.3%) participants. The adjusted ORs for poor health were 3.86, 2.92, 2.60 and 6.41 for the highest, compared with lowest, deciles of Body Mass Index, waist circumference, waist to hip ratio and body fat percent, respectively. The associations were stronger in men (p<0.001). Overall, 7511 (4.6%) participants felt unhappy, and only class III obese participants were more likely to feel unhappy (adjusted OR 1.33, 95% CI 1.15 to 1.53, p<0.001) but the associations differed by sex (p<0.001). Among women, there was a significant association between unhappiness and all levels of obesity. By contrast, only class III obese men had significantly increased risk and overweight and class I obese men were less likely to be unhappy. Conclusions Obesity impacts adversely on happiness as well as health, but the association with unhappiness disappeared after adjustment for self-reported health, indicating this may be mediated by health. Compared with obese men, obese women are less likely to report poor health, but more likely to feel unhappy.