Azcurra 2012.

Methods	RCT.
Participants	135 participants from privately funded nursing homes in Argentina, with a diagnosis of AD according to DSM‐IV. 90 participants were in groups relevant to the current review. Mean age: 85 years.
Interventions	Intervention 1: group RT. Control: unstructured social contact. Intervention 2: counselling (not included in the current review).
Outcomes	Quality of life: SR‐QoL, WIB. Communication: SES. Behavioural: ADL scale. Carer: ZBI.
Length and frequency of intervention	1 hour twice per week for 12 weeks.
Time points measured	Paper stated, "The data were collected at baseline (T0), twelve weeks (T1), and six months post‐intervention (T2)."
Number of participants who did not complete study	5/90 (5.56%).
Notes	Some participants were on psychotropic medication and physically restrained.
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Randomised block design. Participants meeting enrolment criteria were randomly allocated to 1 of 3 groups by the assignment of a unique kit number using a permuted block design at each investigational site (block size of 6) (stated by e‐mail).
Allocation concealment (selection bias)	Low risk	Paper reported, "we used an appropriate method of randomisation with adequate concealment of the participant allocation to treatment groups."
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Independent raters (social workers) completed outcome measures blinded to group allocation. The facilitators carrying out the intervention blinded to the outcome measures.
Incomplete outcome data (attrition bias) All outcomes	Low risk	ITT analysis. Missing data replaced with the mean value of the outcome variables for each group. Withdrawals due to death, moving and believing their allocated condition (control) was "useless."
Selective reporting (reporting bias)	Low risk	All outcomes listed in the methods section were reported and there was no evidence of selective outcome reporting.
Other bias	Low risk	n/a.
Availability of training and supervision Objective outcome measures	Low risk	Team trained by principal investigator to deliver the corresponding sessions in a structured manner. Facilitators had 15 training sessions totalling 30.4 hours.
Availability of manual or protocol for intervention All outcomes	Low risk	Clear protocols developed in the training sessions.