Weight change patterns | No. of incident asthma/person-years | Model 1a | Model 2b | ||
---|---|---|---|---|---|
HR (95% CI) | P | HR (95% CI) | P | ||
Category 1c | |||||
Stable non-obesity | 402/151,360 | 1 | 1 | ||
Non-obesity to obesity | 165/39,485 | 1.66 (1.30, 2.11) | < 0.001 | 1.63 (1.29, 2.07) | < 0.001 |
Obesity to non-obesity | 7/2067 | 1.47 (0.50, 4.27) | 0.479 | 1.21 (0.41, 3.62) | 0.730 |
Stable obesity | 53/12,305 | 1.48 (1.02, 2.16) | 0.041 | 1.41 (0.97, 2.05) | 0.075 |
Category 2d | |||||
Weight loss ≥ 2.5 kg | 33/11,163 | 1.01 (0.60, 1.72) | 0.964 | 0.91 (0.53, 1.56) | 0.725 |
Weight change within 2.5 kg | 126/48,635 | 1 | 1 | ||
Weight gain ≥ 2.5 kg and < 10 kg | 180/66,293 | 0.95 (0.70, 1.30) | 0.744 | 0.99 (0.73, 1.34) | 0.938 |
Weight gain ≥ 10 kg and < 20 kg | 139/46,712 | 1.15 (0.85, 1.56) | 0.372 | 1.19 (0.88, 1.60) | 0.253 |
Weight gain ≥ 20 kg | 149/32,414 | 1.52 (1.14, 2.03) | 0.005 | 1.53 (1.15, 2.03) | 0.004 |