Zapotoczky 2001.

Study characteristics
Methods	A controlled study of weight reduction in type 2 diabetes treated by two reinforcers RCT (NA clusters and NA providers), conducted in 1) Diabetic outpatient clinic of Internal Medicine, University Hospital Graz, Austria. 2) A clinical dietitian in Austria 2 arms: 1. Control: (standard care) (control arm) and 2. Intervention: (treatment) (intervention arm)
Participants	Control arm N: 18 Intervention arm N: 18, NA, NA Diabetes type: 2 Mean age: 57.5 ± 12.71 % Male: 36.11 Longest follow‐up: 12 months
Interventions	Control arm: (standard care) 1) Patient education Intervention arm: (treatment) 1) Case management 2) Patient education 3) Promotion of self‐management
Outcomes	Glycated haemoglobin Systolic blood pressure Diastolic blood pressure Low‐density lipoprotein
Funding source	Not reported
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not reported.
Allocation concealment (selection bias)	Unclear risk	Not reported.
Patient's baseline characteristics (selection bias)	Unclear risk	Table 1. No P values reported and numbers look unbalanced. No information on education or income.
Patient's baseline outcomes (selection bias)	Unclear risk	Not reported.
Incomplete outcome data (attrition bias)	Unclear risk	Not reported.
Blinding of participants and personnel (performance bias) and of outcome assessors (detection bias)	Low risk	Objective measure for HbA1c, BP, LDL.
Selective reporting (reporting bias)	Unclear risk	No protocol registered. Methods match outcomes.
Risk of contamination (other bias)	Unclear risk	They were followed with the same physicians.
Other bias	Low risk	No other source of bias.