T2DM incidence, n | Person-years, follow-up | Age-adjusted rate | Unadjusted model | Multivariable model* | Fully adjusted model† | |
RR (95% CI) | RR (95% CI) | RR (95% CI) | ||||
Trajectories of secondhand smoking exposure | ||||||
Low-stable | 51 | 6155.20 | 904.92 | 1.00 | 1.00 | 1.00 |
Moderate to low | 113 | 14 993.13 | 700.81 | 0.94 (0.74 to 1.20) | 0.74 (0.56 to 0.98) | 0.99 (0.71 to 1.37) |
Moderate | 12 | 1479.73 | 880.46 | 1.02 (0.66 to 1.57) | 0.80 (0.50 to 1.27) | 0.65 (0.37 to 1.15) |
High to low | 24 | 1455.20 | 1728.51 | 2.01 (1.42 to2.83) | 1.91 (1.31 to2.78) | 1.92 (1.22 to3.04) |
P for trend | 0.0009 | 0.0016 | 0.0453 |
The bold values are statistically significant.
*Model adjusted for age, sex and family history of type 2 diabetes, alcohol drinking status, physical exercise, and body mass index, systolic blood pressure, total cholesterol level, educational levels, and household income at baseline.
†Model adjusted for multivariable model+body mass index, systolic blood pressure, and total cholesterol level at endline.
RR, risk ratio; T2DM, type 2 diabetes mellitus.