@article {Pavey95, author = {Toby G Pavey and GMEE (Geeske) Peeters and Wendy J Brown}, title = {Sitting-time and 9-year all-cause mortality in older women}, volume = {49}, number = {2}, pages = {95--99}, year = {2015}, doi = {10.1136/bjsports-2012-091676}, publisher = {British Association of Sport and Excercise Medicine}, abstract = {Background Studies of mid-aged adults provide evidence of a relationship between sitting-time and all-cause mortality, but evidence in older adults is limited. The aim is to examine the relationship between total sitting-time and all-cause mortality in older women. Methods The prospective cohort design involved 6656 participants in the Australian Longitudinal Study on Women{\textquoteright}s Health who were followed for up to 9 years (2002, age 76{\textendash}81, to 2011, age 85{\textendash}90). Self-reported total sitting-time was linked to all-cause mortality data from the National Death Index from 2002 to 2011. Cox proportional hazard models were used to examine the relationship between sitting-time and all-cause mortality, with adjustment for potential sociodemographic, behavioural and health confounders. Results There were 2003 (30.1\%) deaths during a median follow-up of 6 years. Compared with participants who sat \<4 h/day, those who sat 8{\textendash}11 h/day had a 1.45 times higher risk of death and those who sat >=11 h/day had a 1.65 times higher risk of death. These risks remained after adding sociodemographic and behavioural covariates, but were attenuated after adjustment for health covariates. A significant interaction (p=0.02) was found between sitting-time and physical activity (PA), with increased mortality risk for prolonged sitting only among participants not meeting PA guidelines (HR for sitting >=8 h/day: 1.31, 95\% CI 1.07 to 1.61); HR for sitting >=11 h/day: 1.47, CI 1.15 to 1.93). Conclusions Prolonged sitting-time was positively associated with all-cause mortality. Women who reported sitting for more than 8 h/day and did not meet PA guidelines had an increased risk of dying within the next 9 years.}, issn = {0306-3674}, URL = {https://bjsm.bmj.com/content/49/2/95}, eprint = {https://bjsm.bmj.com/content/49/2/95.full.pdf}, journal = {British Journal of Sports Medicine} }