|  | ORa | 95 % CI |
---|---|---|---|
Education level | Â | Â | Â |
Middle school | Low-low | 1.84 | (1.48 – 2.28) |
 | Low-middle | 1.73 | (1.38 – 2.18) |
 | Low-high | 1.49 | (1.13 – 1.96) |
 | Middle-low | 1.21 | (0.96 – 1.54) |
 | Middle-middle | Ref |  |
 | Middle-high | 0.92 | (0.63 – 1.36) |
 | High-low | 0.64 | (0.46 – 0.88) |
 | High-middle | 0.66 | (0.46 – 0.95) |
 | High-high | 0.40 | (0.14 – 1.14) |
High school | Low-low | 2.05 | (1.48 – 2.85) |
 | Low-middle | 1.67 | (1.24 – 2.25) |
 | Low-high | 1.95 | (1.29 – 2.95) |
 | Middle-low | 1.07 | (0.79 – 1.46) |
 | Middle-middle | Ref |  |
 | Middle-high | 1.03 | (0.66 – 1.60) |
 | High-low | 0.68 | (0.47 – 0.97) |
 | High-middle | 0.52 | (0.38 – 0.72) |
 | High-high | 0.30 | (0.11 – 0.83) |
University or above | Low-low | 2.23 | (1.33 – 3.76) |
 | Low-middle | 1.23 | (0.77 – 1.97) |
 | Low-high | 2.52 | (1.43 – 4.42) |
 | Middle-low | 0.93 | (0.57 – 1.51) |
 | Middle-middle | Ref |  |
 | Middle-high | 1.25 | (0.69 – 2.24) |
 | High-low | 0.81 | (0.51 –1.29) |
 | High-middle | 0.87 | (0.63 –1.22) |
 | High-high | 0.98 | (0.63 – 1.68) |