Age 20–49 years | | | | |
N | 1584 | 0.37 | 1871 | 0.01 |
Quartile 1 (reference)† | 1.00 | | 1.00 | |
Quartile 2 | 0.99 (0.35 to 2.76) | | 1.84 (0.55 to 6.17) | |
Quartile 3 | 0.48 (0.14 to 1.60) | | 2.21 (0.71 to 6.88) | |
Quartile 4 | 1.48 (0.36 to 6.01) | | 6.34 (2.01 to19.92) | |
Age ⩾50 years | | | | |
N | 1169 | 0.24 | 1252 | 0.47 |
Quartile 1 (reference)† | 1.00 | | 1.00 | |
Quartile 2 | 3.04 (0.97 to 9.55) | | 0.61 (0.20 to 1.91) | |
Quartile 3 | 1.82 (0.45 to 7.37) | | 0.64 (0.20 to 1.97) | |
Quartile 4 | 2.93 (0.60 to 14.31) | | 1.11 (0.34 to 3.59) | |
p value Wald χ2 for sex-specific interaction between age and quartiles of leptin concentration on asthma status | 0.12 | | 0.74 | |