Varney 2014.

Study characteristics
Methods	Effect of hospital‐based telephone coaching on glycaemic control and adherence to management guidelines in type 2 diabetes, a randomised controlled trial RCT (NA clusters and NA providers), conducted in 1) Diabetes Clinic of St Vincent’s Hospital Melbourne 2) telephone coaching, delivered by a dietitian in Australia 2 arms: 1. Control: (usual care) (control arm) and 2. Intervention: (telephone coaching) (intervention arm)
Participants	Control arm N: 47 Intervention arm N: 47, NA, NA Diabetes type: 2 Mean age: 61.5 ± 11 % Male: 68 Longest follow‐up: 12 months
Interventions	Control arm: (usual care) Intervention arm: (telephone coaching) 1) Case management 2) Promotion of self‐management
Outcomes	Glycated haemoglobin Systolic blood pressure Diastolic blood pressure Low‐density lipoprotein
Funding source	"The publication of these results would not be possible without the generous financial support of the St Vincent’s Hospital, Research Endowment Fund."
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer‐generated block randomisation was undertaken to obtain a one‐to‐one balanced design.
Allocation concealment (selection bias)	Unclear risk	Allocation blinding was maintained until randomisation, after which participants and the principal researcher were informed of randomisation outcome.
Patient's baseline characteristics (selection bias)	Low risk	Table 1, P values provided. Age and ethnicity < 0.05, all others balanced.
Patient's baseline outcomes (selection bias)	Low risk	Table 1, P values provided and greater than 0.05.
Incomplete outcome data (attrition bias)	High risk	11 lost in control group (24%), 12 lost in intervention (26%).
Blinding of participants and personnel (performance bias) and of outcome assessors (detection bias)	Low risk	Objective measure for HbA1c, BP and LDL.
Selective reporting (reporting bias)	High risk	Protocol prospectively registered. Results for smoking cessation not reported at 6 or 12 months. Outcomes only provided for 12‐month follow‐up, protocol states 18‐month follow‐up.
Risk of contamination (other bias)	High risk	Being unblinded, it is also possible that knowledge of group assignment influenced outcomes through favourable expectations associated with randomisation to the intervention group.
Other bias	Low risk	None.