Table 1

Summary relative risks for high versus low and dose–response analyses of main exposures and type 2 diabetes

Main exposuresHigh versus low analysisDose–response analysis
nRR (95% CI)I2PhEggerReferencesnIncrementRR (95% CI)I2PhEggerReferences
Fruit and vegetables100.93 (0.89 to 0.98)00.470.955 6 14–17 22 42 58 607Per 200 g/day0.98 (0.95 to 1.01)37.80.140.415 6 14–16 22 60
 Fruits200.93 (0.90 to 0.97)9.30.340.476–10 12–2319Per 200 g/day0.96 (0.92 to 1.00)68.4<0.00010.276–10 12–16 18–23
 Vegetables170.95 (0.88 to 1.02)60.40.0010.625 6 8 9 11 13–20 22–2415Per 200 g/day0.97 (0.94 to 1.01)39.20.060.035 6 8 9 11 13–16 18–20 22–24
  • n, number of studies; Ph, p value for heterogeneity; RR, relative risk.