| Term birth weight categories (kg) | P trend | ||||
---|---|---|---|---|---|---|
<2.5 | 2.5–3.15 | 3.16–3.82 | 3.83–4.49 | ≥4.5 | ||
Cases/Person-years (PY) | 510/27,436 | 4,077/248,172 | 6,330/450,509 | 1,541/116,911 | 130/11,597 | Â |
Incidence rate (per 105 PY) | 1,859 | 1,643 | 1,405 | 1,318 | 1,121 | Â |
Age adjusted RR (95 % CI) | 1.28 (1.17–1.40) | 1.17 (1.13–1.22) | 1.0 (ref.) | 0.96 (0.91–1.02) | 0.78 (0.66–0.93) | <0.0001 |
Multivariable adjusted * | 1.25 (1.14–1.37) | 1.17 (1.12–1.21) | 1.0 (ref.) | 0.95 (0.90–1.01) | 0.74 (0.62–0.88) | <0.0001 |
Further adjusted BMI ** | 1.29 (1.18–1.41) | 1.20 (1.15–1.25) | 1.0 (ref.) | 0.90 (0.86–0.96) | 0.67 (0.56–0.79) | <0.0001 |