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For the 22% of the sample with missing data for one or more sociodemographic variables, multiple imputation (with 5 imputations) was used under the assumption of missing at random. Analyses were done in October 2011 in STATA/SE 11.0. Linear regression analyses were carried out using recreational and total physical activity (min/week) as the dependent variables and travel mode (motorized, lazabemide combination, active) as the independent variable. Analyses were stratified by commuting status (yes/no) and in commuters, separate models examined associations with travel mode based on commuting, non-commuting and overall travel. The motorized travel category was set as the reference and the lincom command was used to examine differences between those categorised as using a combination of modes and those using only active modes. To examine the possible moderating effect of commuting behaviour, linear regression was also conducted using the entire sample including commuting status as an interaction term. Finally, to examine a possible dose�Cresponse relationship PS-341 purchase linear regression analyses were run with time spent in active travel (categorised as none, GSK1120212 mouse and were excluded. Respondents had a mean age of 50.5?years and just over half were female (Table?1). Respondents were more likely to have a university qualification, own their own home or be retired, and were less likely to be aged 18�C29?years or have no access to a car according to 2001 census data (Table?1). 2267 respondents reported travel for commuting purposes and 3184 reported travel for non-commuting purposes (Table?2). 46 respondents did not report any travel in the previous week. Overall, 2161 (64.7%) respondents reported some form of active travel; 62.3% (n?=?2081) reported walking for transport compared with 11.5% (n?=?383) who cycled. Those who cycled spent a mean of 145.5?min/week (SD?=?135.4) doing so, while those who walked reported a mean of 176.1?min/week (SD?=?176.6) doing so. The time (min/week) spent in recreational and total physical activity by travel mode category (motorized, combination, active) is presented in Table?3. In commuters, there was no statistically significant difference in recreational physical activity by travel mode category.