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Table 1 Risk of bias analysis for randomized studies

From: Efficacy of interventions that include diet, aerobic and resistance training components for type 2 diabetes prevention: a systematic review with meta-analysis

Author, year, Study Name (SN) i) Did the study report a power calculation and was the study adequately powered to detect intervention effects? ii) Was the randomization procedure adequately described and carried out? iii) Did the study include a control group? (randomized participants not a comparison group) iv) Did the study present baseline characteristics separately for treatment groups? v) Did the study analyses account for potential differences at baseline? vi) Were the assessors blinded to treatment allocation at baseline and post-test? vii) Did the study have a dropout of <20% (<6 month follow-up) or <30% (>6 month follow-up for the primary outcome of weight vii) Did the study use an intention to treat analysis? ix) Did the study report summary results for each group? x) Did the study report precision estimates (eg 95% confidence interval) and/or effect sizes? Total
Author Burtscher et al. [35] 0 0 0 1 1 0 0 0 1 0 3
Authors Lindstrom et al. [44], (Eriksson et al. [42] (Laaksonen et al. [43], Lindstrom et al. [45], Lindstrom et al. [46], Tuomilehto et al. [47], Uusitupa et al. [48], Uusitupa et al. [49]) SN: Finnish DPS 0 1 1 1 1 0 1 1 1 1 8
Author McAuley et al. [34], (Dale et al. [33]) 0 1 1 1 1 1 1 1 1 1 9
Authors Page et al. [50] & Page et al. [51] 0 1 1 1 0 0 1 0 1 0 5
Author
Payne et al. [41]
0 0 0 0 1 0 1 1 0 1 4
Authors Roumen et al. [39], (Corpeleijn et al. [36], Mensink et al. [37], Mensink [38], Roumen et al. [40]) SN: The SLIM study 1 1 1 1 1 1 1 1 1 1 10
Authors Villareal [29, 31], (Villareal et al. [30], Villareal [29, 31]) 0 1 1 1 1 1 1 1 1 1 9