title: Validity of self-reported sedentary time differs between Australian rural men engaged in office and farming occupations.
abstract: Rural Australians have a higher likelihood of chronic disease than urban Australians, particularly male farmers. Chronic disease has been associated with occupational sedentary time. The aim was to validate the self-report of sedentary time in men in contrasting rural occupations. Farmers (n = 29) and office workers (n = 28), age 30-65 years, were recruited from the Riverland region of South Australia. Daily sedentary time and number of breaks in sedentary time were self-reported and measured objectively using body-worn inclinometers. Correlational analyses were conducted between self-reported and objectively measured variables, separately by occupation. There was a significant correlation between self-reported and objectively measured sedentary time in the whole sample (r = 0.44, P = 0.001). The correlation among office workers was significant (r = 0.57, P = 0.003) but not among farmers (r = 0.08, P = 0.68). There were no significant correlations between self-reported and measured number of breaks in sedentary time, for the whole sample (rho = -0.03, P = 0.83), office workers (rho = 0.17, P = 0.39) and farmers (rho = -0.22, P = 0.25). In conclusion, the validity of self-report of sedentary behaviours by farmers was poor. Further research is needed to develop better performing self-report instruments or more accessible objective measures of sedentary behaviour in this population.
authors.affiliation: a Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, Division of Health Sciences , University of South Australia , Adelaide , Australia.
authors.forename: James
authors.initials: J
authors.lastname: Dollman
authors.affiliation: a Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, Division of Health Sciences , University of South Australia , Adelaide , Australia.
authors.forename: Johanna L
authors.initials: JL
authors.lastname: Pontt
authors.affiliation: a Alliance for Research in Exercise, Nutrition and Activity (ARENA), Sansom Institute for Health Research, Division of Health Sciences , University of South Australia , Adelaide , Australia.|b NIHR Leicester-Loughborough Diet , Lifestyle and Physical Activity Biomedical Research Unit , Leicester , UK.|c Diabetes Research Centre , University of Leicester, Leicester General Hospital , Leicester , UK.
authors.forename: Alex V
authors.initials: AV
authors.lastname: Rowlands
mesh_terms: D061725:Accelerometry; D000328:Adult; D000886:Anthropometry; D000067565:Farmers; D015438:Health Behavior; D006801:Humans; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D012424:Rural Population; D057185:Sedentary Behavior; D057566:Self Report; D013021:South Australia; D011795:Surveys and Questionnaires
keywords: Sitting time; adult; occupational groups; self-report; validation