| outcome | sensitivity analysis on diagnostic criteria | result |
|---|---|---|
| 1.1 Normalisation of fasting blood glucose |
Exclude WHO 1985 (Yao Z 2001) | RR 2.35 (95% CI 1.71 to 3.23) I2 = 51% |
| 1.2 Incidence of diabetes | Exclude WHO 1985 (Yao Z 2001; Zhou DY 2003) | RR 0.29 (95% CI 0.15 to 0.56] I2 = 41% |
| 1.3 Fasting blood glucose | Exclude ADA 1997 (Yang B 2004) | RR −0.64 (95% CI −0.94 to − 0.35] I2 = 90% |
| Exclude WHO 1985 (Yao Z 2001; Zeng YH 2006; Zhou DY 2003) | RR −0.50 (95% CI −0.81 to − 0.18) I2 = 92% |
|
| Exclude both WHO 1985 and ADA 1997 | RR −0.54 (95% CI −0.93 to − 0.16) I2 = 92% |
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