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Table 1 Self-determination theory reviews

From: Self-determination theory interventions versus usual care in people with diabetes: a protocol for a systematic review with meta-analysis and trial sequential analysis

  Ng et al. [40] Gillison et al. [21] Ntoumanis et al. [20]
Designs included 184 independent datasets, primarily non-experimental design 74 studies including a control group (59 of randomised clinical trials (RCTs) or cluster RCTs) 73 independent datasets, 58 RCTs (20 of these were cluster RCTs)
Number of trials including people with diabetes Seven trials [32, 41,42,43,44,46] One trial [47] Six trials [45, 47,48,49,50,51]
Registered in PROSPERO No No No
Protocol published No No No
Restricted searches PsycINFO, PsycARTICLES and PubMed, citation searches (ISI web of knowledge) Web of Science, PsychINFO, PubMed, Cochrane Database, DARE, Biomed Central, Sociological abstracts, ProQuest PsycINFO, PsycARTICLES and PubMed/Medline
Assessment of bias risk Not performed A modified version of the Cochrane risk of bias tool (random group allocation, treatment allocation concealment, groups similar at baseline, blinded outcome assessor, intention-to-treat analyses, risk of bias) A modified version of the Cochrane risk of bias tool (random group allocation, group allocation concealment, blinded outcome assessor, handling of missing data, selective reporting, other bias)
Assessment of random errors, using trial sequential analysis No No No
Outcomes Specific self-determination theory constructs Specific self-determination theory constructs Specific self-determination theory constructs
Assessment of adverse effects No No No