The Abiraterone solubility only notable difference was that a direct association between SEP and non-TV sitting time was observed on weekend days, but not on weekdays. Discussion Literature on the socioeconomic gradient of sedentary behaviour is very limited and has relied on partial sedentary behaviour indicators, mostly TV viewing. To the best of our knowledge, this study is the only one that considers four indicators of SEP in relation to four indicators of sedentary behaviour, allowing a much more in-depth examination of the associations of interest than in previous studies. Our study suggests that

occupational ST is what drives the positive association between overall SEP and total ST as there was no association among those not in employment (figure 2). The difference between the lowest and highest SEP groups (figure 1) is in the region of 60–70 min/day for total accelerometry-measured ST and occupational sitting/standing time and this is comparable with the difference between the extreme SEP group among

the economically active part of the sample (∼90 min/day). As low SEP is more likely to involve fixed length shift-based work one possible explanation is that these occupational ST differences reflect the longer working hours of professionals in higher SEP groups, although we had no information on work times to examine this hypothesis or make statistical adjustments. Our findings agree with an Australian

study,19 which found that among women, full-time work, skilled occupations and university education were all associated with high (self-reported) total sitting time. Our study also found that the inverse association between TV time and SEP was significant regardless of employment status. In a study of Dutch workers, sitting time at work varied considerably by type of occupation but not sitting during leisure time.28 Previous studies of adults in Belgium13 and Australia14 15 29 have reported inverse associations between SEP indicators and TV time. We observed the same TV time pattern with SEP score and education Brefeldin_A but not with occupational class, household income or area deprivation. Although the occupational class and household income data were suggestive of a weak association with TV time, our current results somehow contradict our study in Scottish adults,12 where all SEP indicators (occupational class, household income or area deprivation) as well as the composite SEP score were associated with recreational screen time (including TV time).