title: Behavioral mediators of weight loss in the SHED-IT community randomized controlled trial for overweight and obese men.
abstract: BACKGROUND
  Little is known about which behavioral strategies are most important to target in weight loss interventions for men.
  
  
  OBJECTIVE
  The aim of the current study was to identify behavioral mediators of weight loss in the male-only Self-Help, Exercise, and Diet using Information Technology (SHED-IT) community weight loss study.
  
  
  METHODS
  A randomized controlled trial with 159 overweight/obese men [mean (SD) age = 47.5 (11.0) years; body mass index = 32.7 (3.5) kg/m(2)] assessed at baseline, 3 months (post-test) and 6 months (follow-up).
  
  
  RESULTS
  In an intention-to-treat, multiple-mediator model, the significant intervention effect on weight at 6 months (-3.70 kg; p < 0.001) was mediated by increases in physical activity (steps/day) and decreases in takeaway meals (kJ/day) and portion size at 3 months. The largest mediation effect was for physical activity (-0.6 kg; 95 % confidence interval -1.4, -0.1). Overall, the targeted mediators accounted for 47.0 % of the intervention's effect on weight.
  
  
  CONCLUSIONS
  Step counts, takeaway food consumption, and portion sizes may be key areas to target in future weight loss programs for men (ACTRN12610000699066).
authors.affiliation: Priority Research Centre in Physical Activity and Nutrition, School of Education, Faculty of Education and Arts, University of Newcastle, Callaghan Campus, Callaghan, Australia, myles.young@newcastle.edu.au.
authors.forename: Myles D
authors.initials: MD
authors.lastname: Young
authors.forename: David R
authors.initials: DR
authors.lastname: Lubans
authors.forename: Clare E
authors.initials: CE
authors.lastname: Collins
authors.forename: Robin
authors.initials: R
authors.lastname: Callister
authors.forename: Ronald C
authors.initials: RC
authors.lastname: Plotnikoff
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Morgan
mesh_terms: D000328:Adult; D015992:Body Mass Index; D004032:Diet; D005081:Exercise Therapy / Q000523:psychology*; D015438:Health Behavior; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000523:psychology / Q000628:therapy*; D050177:Overweight / Q000523:psychology / Q000628:therapy*; D016896:Treatment Outcome; D015431:Weight Loss