Table 2.
Incidence rate ratios (IRR) of T2DM in relation to calendar year and demographic factors
| Characteristic | Boys | Girls | All | |||
|---|---|---|---|---|---|---|
| IRR (95% CIs) | P-value | IRR (95% CIs) | P-value | IRR (95% CIs) | P-value | |
| Year | ||||||
| 2007 | Ref. | Ref. | Ref. | |||
| 2008 | 1.41 (0.62, 3.16) | 0.411 | 1.12 (0.49, 2.53) | 0.792 | 1.25 (0.71, 2.23) | 0.440 |
| 2009 | 1.59 (0.72, 3.50) | 0.250 | 2.04 (0.99, 4.21) | 0.053 | 1.82 (1.07, 3.10) | 0.027 |
| 2010 | 3.01 (1.48, 6.15) | 0.002 | 3.12 (1.58, 6.15) | 0.001 | 3.06 (1.87, 5.01) | <0.001 |
| 2011 | 2.94 (1.44, 5.99) | 0.003 | 3.17 (1.61, 6.23) | 0.001 | 3.05 (1.86, 4.98) | <0.001 |
| 2012 | 4.03 (2.02, 8.02) | <0.001 | 2.51 (1.25, 5.05) | 0.001 | 3.25 (2.00, 5.28) | <0.001 |
| 2013 | 6.23 (3.20, 12.12) | <0.001 | 3.66 (1.88, 7.13) | 0.001 | 4.91 (3.07, 7.84) | <0.001 |
| Sex | ||||||
| Girls | Ref. | |||||
| Boys | 1.12 (0.92, 1.37) | 0.250 | ||||
| Age | ||||||
| 5–9 ys | 0.03 (0.01, 0.08) | <0.001 | 0.02 (0.00, 0.07) | <0.001 | 0.02 (0.01, 0.05) | <0.001 |
| 10–14 ys | 0.18 (0.12, 0.27) | <0.001 | 0.28 (0.19, 0.40) | <0.001 | 0.22 (0.17, 0.29) | <0.001 |
| 15–19 ys | Ref. | Ref. | Ref. | |||
| Residence area | ||||||
| Rural | Ref. | Ref. | Ref. | |||
| Urban | 1.21 (0.91, 1.59) | 0.184 | 1.88 (1.41, 2.52) | <0.001 | 1.49 (1.22, 1.82) | <0.001 |
Multivariable Poisson regression model with the calendar year as a dummy variable, bold values indicate statistical significance