Prevalence | Crude OR (95% CI) | Adjusted OR (95% CI)a | |
---|---|---|---|
Paternal education (years) | |||
< 13 | 374/1948 (19.2%) | 1.00 | 1.00 |
13–14 | 134/918 (14.6%) | 0.72 (0.58–0.89) | 0.75 (0.60–0.93) |
≥ 14 | 419/3449 (12.2%) | 0.58 (0.50–0.68) | 0.69 (0.59–0.82) |
P for trend | < 0.0001 | < 0.0001 | |
Maternal education (years) | |||
< 13 | 304/1505 (20.2%) | 1.00 | 1.00 |
13–14 | 294/2118 (13.9%) | 0.64 (0.53–0.76) | 0.72 (0.60–0.87) |
≥ 14 | 329/2692 (12.2%) | 0.55 (0.46–0.65) | 0.64 (0.53–0.77) |
P for trend | < 0.0001 | < 0.0001 | |
Household income (yen/year) | |||
< 4,000,000 | 371/1969 (18.8%) | 1.00 | 1.00 |
4,000,000–5,999,999 | 312/2147 (14.5%) | 0.73 (0.62–0.86) | 0.84 (0.71–0.995) |
≥ 6,000,000 | 244/2199 (11.1%) | 0.54 (0.45–0.64) | 0.66 (0.55–0.79) |
P for trend | < 0.0001 | < 0.0001 |