Glasgow 1996.

Study characteristics
Methods	Effects of a brief office‐based intervention to facilitate diabetes dietary self‐management Patient RCT, 2 providers, conducted in the 2 offices; 1 endocrinologist and 1 internist in Oregon, USA Two arms: 1. Usual care (control arm) and 2. Brief intervention (intervention arm)
Participants	Control arm N: 98 Intervention arm N: 108 Diabetes type: type 1 and type 2 Mean age: 62.4 ± 11.4 % Male: 38.4 Longest follow‐up: 3 months
Interventions	Control arm: None Intervention arm: 1) Case management 2) Clinician reminders 3) Facilitated relay of clinical information 4) Patient education 5) Promotion of self‐management
Outcomes	1) HbA1c, mean % (SD) Control arm: pre 7.9 (NR), post 7.7 (NR) Intervention arm: pre 7.8 (NR), post 7.6 (NR)
Funding source	This research was supported by grant #ROl DK‐35524 from the National Institute of Diabetes, Digestive, and Kidney Diseases
Notes	—
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Information not available.
Allocation concealment (selection bias)	Unclear risk	Information not available.
Patient's baseline characteristics (selection bias)	Low risk	Information not available.
Patient's baseline outcomes (selection bias)	Low risk	Information not available.
Incomplete outcome data (attrition bias)	Low risk	12% lost to follow‐up in intervention group and 11% in usual care group.
Blinding of participants and personnel (performance bias) and of outcome assessors (detection bias)	High risk	Primary outcome is food diaries.
Selective reporting (reporting bias)	Low risk	Information not available.
Risk of contamination (other bias)	Low risk	Information not available.
Other bias	Low risk	Information not available.