Table 1.

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

Main exposures	High versus low analysis						Dose–response analysis
	n	RR (95% CI)	I2	Ph	Egger	References	n	Increment	RR (95% CI)	I2	Ph	Egger	References
Fruit and vegetables	10	0.93 (0.89 to 0.98)	0	0.47	0.95	5 6 14–17 22 42 58 60	7	Per 200 g/day	0.98 (0.95 to 1.01)	37.8	0.14	0.41	5 6 14–16 22 60
Fruits	20	0.93 (0.90 to 0.97)	9.3	0.34	0.47	6–10 12–23	19	Per 200 g/day	0.96 (0.92 to 1.00)	68.4	<0.0001	0.27	6–10 12–16 18–23
Vegetables	17	0.95 (0.88 to 1.02)	60.4	0.001	0.62	5 6 8 9 11 13–20 22–24	15	Per 200 g/day	0.97 (0.94 to 1.01)	39.2	0.06	0.03	5 6 8 9 11 13–16 18–20 22–24

n, number of studies; P_h, p value for heterogeneity; RR, relative risk.