Xuxi Zhang

6 Cade, J. E., 2009 [30] Baseline(with HbA 1c data): In total: 207; IG: 89; CG: 118 Follow ‐ up intervals (10.25 month, with HbA 1c data) § : CR: 79.2%; IG: 86 Attrition: 3.4%; CG: 108 Attrition: 8.5% Patients: Adults with Type 2 diabetes (defined as onset over age 30 years, not on insulin within the first year) Mean age: IG: 65.4 CG: 66.2 Female (%): 41.3% Insulin usage (%): 0% Other features: Registered with GP practices selected from socially deprived catchment areas RCT UK PLI/CCOI 1.75 months 7, Gagliardi no, J. J., 2013 [20] In total: 198; IG: 93; CG: 105 Baseline(with HbA 1c data): IG:66; CG:78 Follow ‐ up intervals ( ‐ 6 months, with HbA 1c data): CR: 99.5%; IG: 92 Attrition: 1.1% ; CG: 105 Attrition: 0% Follow ‐ up intervals (0 month, with HbA 1c data): IG: 93 Attrition: 0%; CG: 104 Attrition: 0.10% Patients: People with type 2 diabetes for at least 2 years with more than two diabetes encounters Mean age: IG:62 CG:60 Female (%): 51.4% Insulin usage (%):  ‐‐  Other features: Patients were selected from a list of people with type 2 diabetes provided by physicians RCT Argentina PLI/CCRI 12 months 8, Lorig, K., 2008 [31] Baseline || : In total: 417; IG: 219; CG: 198 Follow ‐ up intervals (0 month): CR: 84.4%; IG: 179 Attrition: 18.3%; CG: 173 Attrition: 12.6% Patients: Not pregnant or in care for cancer, and had type 2 diabetes Mean age: 52.9 Female (%): IG: 57.1% CG: 67.2% P=0.034<0.05 ¶ Insulin usage (%): Baseline 10.3% Other features: Spanish ‐ speaking adults RCT United States PLI/CCRI 6 months 9, Smith, S. M., 2011 [23] Baseline(with HbA 1c data): In total: 388; IG: 187; CG: 201 Follow ‐ up intervals (0 month, with HbA 1c data): CR: 86.3%; IG: 165 Attrition: 11.8%; CG: 170 Attrition: 15.7% Patients: Had type 2 diabetes, be able to participate in a group, and be attending one of the participating practices Mean age: IG:66.1 CG:63.2 Female (%): 45.8% Insulin usage (%): 2% Other features:  ‐‐  RCT (cluster) Ireland PLI/SGI 24 months 10, Philis ‐ Tsimikas, A., 2011 [24] Baseline: In total: 207; IG: 104; CG: 103 Follow ‐ up intervals (0 month, with HbA 1c data): CR: 70.0%; IG: 64 Attrition: 38.5%; CG: 81 Attrition: 21.4% Follow ‐ up intervals (6 months, with HbA 1c data): CR: 64.3%; IG: 56 Attrition: 38.5%; CG: 74 Attrition: 21.4% Participants who were lost to follow ‐ up did not differ significantly from those who completed at least one assessment on any demographic or outcome variable. Patients: With type 2 diabetes and HbA1c>10% Mean age: IG: 52.2 CG: 49.2 P=0.05 No significant difference in the other dependent variables between IG and CG Female (%): 70.5% Insulin usage (%):  ‐‐  Other features: High ‐ Risk Mexican Americans RCT United States PLI/CCRI 4 months 6 135 Peer support among adults with type 2 diabetes