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Table 3 Intervention effects, listed by theoretical basis

From: Effects of workplace-based dietary and/or physical activity interventions for weight management targeting healthcare professionals: a systematic review of randomised controlled trials

Study Behaviour change theory/theories used to
develop intervention*
Study quality score Follow-up from baseline Body weight BMI Body fat% Waist circumference Waist-hip ratio Total energy intake Total fat intake Saturated fat intake % Energy fat Fruit intake Vegetable intake Fibre intake Diet score MPA VPA Total steps Self-reported PA
Armitage 2001 [44] The Trans Theoretical Model of Behavioural Change Moderate 5 months                
Racette 2009 [48] The Trans Theoretical Model of Behavioural Change Moderate 6 months               
12 months              
Lemon 2010 [50] Diffusion of Innovation Theory, the Ecologic Conceptual Framework, the Health Belief Model, Organizational Development Theory, Social Cognitive Theory and the Theory of Reasoned Action Moderate 12 months                  
24 months  
Strijk 2012 [56] Study used theoretical constructs to inform the design of each specific component of the intervention but did not reference any specific theory used Weak 6 months                
Gamble 1993 [42] No theory reported Moderate 11 weeks                 
Barratt 1994 [52] No theory reported Weak 3 months                 
6 months                
Cockroft 1994 [43] No theory reported Weak 6 months                 
Gerdle 1995 [46] No theory reported Weak 12 months                 
Aldana 2005 [34] No theory reported Moderate 6 weeks         
6 months         
Brox 2005 [53] No theory reported Weak 6 months                 
Von Thiel Schwarz 2008 [47] No theory reported Moderate 6 months                 
12 months                 
Hewitt 2008 [45] No theory reported Strong 4 weeks                
8 weeks                
12 weeks                
Christensen 2011 [36] No theory reported Strong 3 months             
12 months  
  1. *Reported by study authors; ↑ = Indicates a statistically significant effect in favour of the intervention; ↓ = Indicates a non-significant effect of intervention; BMI = body mass index, MPA = Moderate physical activity, VPA = Vigorous physical activity, PA = Physical activity; Blank cells = the outcome was not reported.