Published Papers - Abstract 458

van Uffelen J, Watson M, Dobson A & Brown W. Comparison of self-reported week-day and weekend-day sitting time and weekly time-use: results from the Australian Longitudinal Study on Women’s Health. Int. J. Behav. Med, 2011; 18(3): 221-228

Background: The study of sedentary behavior is a relatively new area in population health research, and little is known about patterns of sitting time on weekdays and weekend-days.Purpose To compare self-reported week-day and weekendday sitting time with reported weekly time spent in other activities.Method Data were from 8,717 women born between 1973 and 1978 (‘younger’), and 10,490 women born between 1946 and 1951 (‘mid-age’) who completed surveys for the Australian Longitudinal Study on Women’s Health in 2003 and 2001, respectively. They were asked about time spent sitting on week-days and weekend-days. The women were also asked to report time spent in employment, active leisure, passive leisure, home duties, and studying. Mean week-day and weekend-day sitting times were compared with time-use using analysis of variance.Results Younger women sat more than mid-aged women, and sitting time was higher on week-days than on weekend-days in both cohorts. There were marked positive associations between week-day and weekend-day sitting times and time spent in passive leisure in both cohorts, and with time spent studying on week-days for the younger women. Week-day sitting time was markedly higher in women who reported >35 h in employment, compared with those who worked <35 h. In contrast, there wereinverse associations between sitting time and time spent in home duties. Associations between sitting and active leisure were less consistent.Conclusion Although week-day sitting time was higher than weekend-day sitting time, the patterns of the relationships between week-day and weekend-day sittingand time-use were largely similar, except for time spent in employment.