Structured population data were available for 3 of 3 supporting studies. 3 studies described participants with type 2 diabetes. 3 studies described adult participants.

1 relevant study has unresolved authoritative design evidence and does not contribute to design-specific or RoB-specific claims.

1 supporting study does not have a displayable topic-matched quantitative effect.

Evidence uses heterogeneous comparison contexts: active_comparator, unknown_unresolved.

1 supporting study has high, serious, critical, unclear, or unavailable risk-of-bias information.

2 of 3 studies with duration data have follow-up of 12 weeks or less.

Not extracted from the authoritative source.

Source evidence could not be resolved sufficiently for this field.

Available source content was suppressed because validation identified a conflict.

Clinician-reference record is usable with limitations in: design, comparator, risk_of_bias.

Patients receiving metformin as monotherapy.

Metformin group (Group M)

Patients receiving metformin 1000 mg once daily were taken in Group M.

Patients receiving metformin plus ranolazine.

Metformin plus ranolazine group (Group M+R)

Patients receiving metformin 1000 mg once daily plus ranolazine were enrolled in Group M+R.

Authoritative quality diagnostic: invalid or missing value.

Authoritative quality diagnostic: source evidence unresolved.

Ranolazine improves glycaemic control when added to metformin in T2DM patients

Metformin

Core clinician-reference fields are available or not applicable.

Patients received sitagliptin (100 mg/d) plus metformin (2000 mg/d).

Sitagliptin plus Metformin

Patients were randomly assigned to either metformin (2000 mg/d, n=33) or sitagliptin + metformin (100 and 2000 mg/d, respectively, n=33), administered orally.

Patients received metformin alone (2000 mg/d).

Sitagliptin with Metformin Improves Metabolic Health

Metformin Group

Patients received 50 mg of vildagliptin orally twice daily.

Vildagliptin Group

The first group (117 patients) received 50 mg of vildagliptin orally twice daily.

Patients received 500 mg of metformin orally twice daily with meals, with dosage adjustable.

The second group (129 patients) received 500 mg of metformin orally twice daily with meals, and the dosage could be gradually increased by 500 mg per week, up to a maximum daily dose of 2000 mg.

Vildagliptin and Metformin Improve Glycemic Control in Type 2 Diabetes

Structured population data were available for 3 of 3 supporting studies. Diabetes type was heterogeneous: 2 studies with type 2 diabetes, 1 studies with type 1 diabetes. 2 studies described adult participants.

1 of 2 studies with duration data have follow-up of 12 weeks or less.

Structured population data were available for 4 of 4 supporting studies. 3 studies described participants with type 2 diabetes. 3 studies described adult participants.

Evidence uses heterogeneous comparison contexts: active_comparator, placebo.

1 study contains conflicting p-value and significance fields; those significance claims are suppressed.

Structured population data were available for 3 of 3 supporting studies. 1 study described adult participants.

2 relevant studies have unresolved authoritative design evidence and do not contribute to design-specific or RoB-specific claims.

Upstream consistency scoring indicates mixed findings across the evidence.

Evidence uses heterogeneous comparison contexts: active_comparator, baseline_within_group, usual_care.

2 supporting studies have high, serious, critical, unclear, or unavailable risk-of-bias information.

Structured population data were available for 3 of 3 supporting studies. 2 studies described participants with type 2 diabetes. 2 studies described adult participants.

Evidence uses heterogeneous comparison contexts: baseline_within_group, usual_care.

3 of 3 studies with duration data have follow-up of 12 weeks or less.

Structured population data were available for 3 of 3 supporting studies. 1 study described participants with type 2 diabetes. 2 studies described adult participants.

Structured population data were available for 3 of 3 supporting studies. 3 studies described participants with type 2 diabetes. 2 studies described adult participants.

Structured population data were available for 3 of 3 supporting studies. Diabetes type was heterogeneous: 1 studies with type 1 diabetes, 1 studies with type 2 diabetes. 3 studies described adult participants.

Evidence uses heterogeneous comparison contexts: active_comparator, unknown_unresolved, usual_care.

Structured population data were available for 4 of 4 supporting studies. 2 studies described adult participants.

Evidence uses heterogeneous comparison contexts: other, usual_care.

3 supporting studies have high, serious, critical, unclear, or unavailable risk-of-bias information.

Structured population data were available for 4 of 4 supporting studies. 4 studies described participants with type 2 diabetes. 4 studies described adult participants.

Structured population data were available for 3 of 3 supporting studies. 3 studies described adult participants.

Structured population data were available for 3 of 3 supporting studies. 2 studies described participants with type 2 diabetes. 3 studies described adult participants.

Evidence uses heterogeneous comparison contexts: active_comparator, usual_care.

Evidence uses heterogeneous comparison contexts: placebo, unknown_unresolved, usual_care.

Structured population data were available for 6 of 6 supporting studies. Diabetes type was heterogeneous: 1 studies with type 1 diabetes, 1 studies with type 2 diabetes. 3 studies described adult participants.

3 relevant studies have unresolved authoritative design evidence and do not contribute to design-specific or RoB-specific claims.

Evidence uses heterogeneous comparison contexts: active_comparator, baseline_within_group, unknown_unresolved, usual_care.

3 of 6 studies with duration data have follow-up of 12 weeks or less.

Structured population data were available for 4 of 4 supporting studies. 2 studies described participants with type 2 diabetes. 4 studies described adult participants.

2 supporting studies do not have a displayable topic-matched quantitative effect.

Evidence uses heterogeneous comparison contexts: active_comparator, placebo, unknown_unresolved.

2 of 4 studies with duration data have follow-up of 12 weeks or less.

Structured population data were available for 4 of 4 supporting studies. Diabetes type was heterogeneous: 2 studies with type 2 diabetes, 1 studies with type 1 diabetes. 3 studies described adult participants.

4 of 4 studies with duration data have follow-up of 12 weeks or less.

Structured population data were available for 7 of 7 supporting studies. Diabetes type was heterogeneous: 4 studies with type 2 diabetes, 1 studies with type 1 diabetes. 5 studies described adult participants.

3 supporting studies do not have a displayable topic-matched quantitative effect.

Evidence uses heterogeneous comparison contexts: active_comparator, baseline_within_group, placebo, unknown_unresolved, usual_care.

2 studies contain conflicting p-value and significance fields; those significance claims are suppressed.

Evidence uses heterogeneous comparison contexts: placebo, usual_care.

Structured population data were available for 9 of 9 supporting studies. Diabetes type was heterogeneous: 4 studies with type 1 diabetes, 2 studies with type 2 diabetes. 7 studies described adult participants.

Metformin × Fasting blood sugar (FBS)

Available supporting studies

Ranolazine improves glycaemic control when added to metformin in T2DM patients

Sitagliptin with Metformin Improves Metabolic Health

Vildagliptin and Metformin Improve Glycemic Control in Type 2 Diabetes