Yoon 2008.

Study characteristics
Methods	A short message service by cellular phone in type 2 diabetic patients for 12 months Patient RCT, conducted in an endocrinology outpatient department of a tertiary care hospital in urban city of South Korea Two arms: 1. Control (control arm) and 2. Intervention (intervention arm)
Participants	Control arm N: 26 Intervention arm N: 24 Diabetes type: type 2 Mean age: 47.2 ± 9.0 % Male: 43.2 Longest follow‐up: 12 months
Interventions	Control arm: None Intervention arm: 1) Case management 2) Team changes 3) Electronic patient registry 4) Facilitated relay of clinical information 5) Patient education 6) Promotion of self‐management 7) Patient reminders
Outcomes	1) HbA1c, mean % (SD) Control arm: pre 7.6 (1.1), post 8.4 (1.0) Intervention arm: pre 8.1 (1.7), post 6.8 (0.8)
Funding source	This work was supported by grants from the Seoul R&BD Program (2006‐10829)
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	Information not available.
Blinding of participants and personnel (performance bias) and of outcome assessors (detection bias)	Low risk	Information not available.
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.