Inclusion Criteria

Ÿ Only Randomized controlled trials (RCT)

Ÿ RCTs including primary prevention of overt type 2 diabetes mellitus from prediabetes states

Ÿ RCTs that include drug (pharmacological) in primary prevention of type 2 diabetes

Ÿ RCTs that include lifestyle changes (non-pharmacological) primary of type 2 diabetes prevention

Ÿ Articles in English only

Ÿ Moderate to high strength according to CASP tool for RCT

Exclusion Criteria

Ÿ Secondary prevention of type 2 diabetes mellitus

Ÿ Non inferiority trials

Ÿ Non RCT

Ÿ Non-human trials

Ÿ Low strength according to CASP tool for RCT