Quintile of intake | Cases/N | Asthma (18 months) N = 33,425/29,1612/28,4213 | P for trend4 | Cases/N | Current asthma (7 years - ISAAC) N = 28,687/25,0252/24,3823 | P for trend4 | Cases/N | Ever admitted asthma N = 28,767/25,0952/24,4523 | P for trend4 | Cases/N | Ever prescribed asthma N = 28,758/25,0942/25,4523 | P for trend4 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
RR (95% CI) | RR (95% CI) | RR (95% CI) | RR (95% CI) | ||||||||||
Continuous | Crude | 5,635/33,425 (17%) | 1.00 (0.99, 1.00) | 0.90 | 1,122/28,687 (4%) | 1.00 (0.99, 1.01) | 0.73 | 1,654/28,767 (6%) | 1.00 (0.99, 1.01) | 0.88 | 8,906/28,758 (31%) | 1.00 (1.00, 1.01) | 0.04 |
Adjusted2 | 1.00 (1.00, 1.01) | 0.59 | 1.00 (0.99, 1.01) | 0.88 | 1.00 (0.99, 1.01) | 0.45 | 1.01 (1.00, 1.01) | 0.15 | |||||
Adjusted3 | 1.00 (0.99, 1.01) | 0.91 | 0.99 (0.97, 1.00) | 0.09 | 0.99 (0.97, 1.00) | 0.08 | 1.00 (0.99, 1.00) | 0.30 | |||||
1 | Crude | 1,123/6,627 (17%) | 1.00 (ref.) | 0.54 | 219/5,728 (4%) | 1.00 (ref.) | 0.67 | 344/5,743 (6%) | 1.00 (ref.) | 0.92 | 1,724/5,741 (30%) | 1.00 (ref.) | 0.05 |
Adjusted2 | 0.85 | 0.70 | 0.41 | 0.21 | |||||||||
Adjusted3 | 0.40 | 0.06 | 0.06 | 0.36 | |||||||||
2 | Crude | 1,137/6,836 (17%) | 0.98 (0.91, 1.06) | 218/5,936 (4%) | 0.96 (0.80, 1.15) | 318/5,953 (5%) | 0.89 (0.77, 1.03) | 1,811/5,953 (30%) | 1.01 (0.96, 1.07) | ||||
Adjusted2 | 1.01 (0.93, 1.09) | 0.98 (0.81, 1.19) | 0.92 (0.79, 1.08) | 1.04 (0.98, 1.10) | |||||||||
Adjusted3 | 1.00 (0.91, 1.10) | 0.84 (0.67, 1.05) | 0.88 (0.73, 1.06) | 0.99 (0.93, 1.06) | |||||||||
3 | Crude | 1,170/6,725 (17%) | 1.03 (0.95, 1.11) | 231/5,710 (4%) | 1.06 (0.88, 1.27) | 341/5,725 (6%) | 0.99 (0.86, 1.15) | 1,798/5,721 (31%) | 1.05 (0.99, 1.11) | ||||
Adjusted2 | 1.04 (0.96, 1.12) | 1.02 (0.84, 1.24) | 0.96 (0.82, 1.12) | 1.04 (0.98, 1.10) | |||||||||
Adjusted3 | 1.00 (0.91, 1.11) | 0.87 (0.69, 1.10) | 0.90 (0.74, 1.09) | 0.96 (0.90, 1.03) | |||||||||
4 | Crude | 1,146/6,714 (17%) | 1.01 (0.93, 1.09) | 247/5,702 (4%) | 1.13 (0.95, 1.35) | 331/5,714 (6%) | 0.97 (0.84, 1.12) | 1,810/5,712 (32%) | 1.06 (1.00, 1.11) | ||||
Adjusted2 | 1.01 (0.93, 1.09) | 1.08 (0.90, 1.31) | 0.92 (0.79, 1.08) | 1.04 (0.98, 1.10) | |||||||||
Adjusted3 | 0.96 (0.86, 1.07) | 0.91 (0.71, 1.17) | 0.80 (0.65, 0.99) | 0.95 (0.88, 1.03) | |||||||||
5 | Crude | 1,059/6,523 (16%) | 0.96 (0.89, 1.03) | 207/5,611 (4%) | 0.96 (0.80, 1.16) | 320/5,632 (6%) | 0.95 (0.82, 1.10) | 1,763/5,631 (31%) | 1.04 (0.99, 1.10) | ||||
Adjusted2 | 0.99 (0.91, 1.07) | 0.91 (0.75, 1.11) | 0.92 (0.79, 1.08) | 1.04 (0.98, 1.11) | |||||||||
Adjusted3 | 0.96 (0.86, 1.07) | 0.74 (0.56, 0.96) | 0.80 (0.64, 1.00) | 0.97 (0.89, 1.05) |