log10Rrs6 | log10AX | |||||
Continuous variables | B | se | p-value | B | se | p-value |
Current height cm | −0.005 | 0.001 | <0.001 | −0.013 | 0.003 | <0.001 |
Current weight kg | −0.004 | 0.002 | 0.037 | −0.014 | 0.006 | 0.017 |
Gestational age weeks | −0.004 | 0.003 | 0.119 | −0.016 | 0.008 | 0.049 |
Birth weight kg | −0.024 | 0.009 | 0.007 | −0.064 | 0.026 | 0.012 |
Categorical variables | Mean | se | p-value# | Mean | se | p-value# |
Parental asthma | ||||||
No | 0.997 | 0.005 | Ref. | 1.259 | 0.014 | Ref. |
Mother | 1.025 | 0.020 | 0.100 | 1.356 | 0.055 | 0.054 |
Father | 1.003 | 0.017 | 0.773 | 1.247 | 0.049 | 0.833 |
Both parents | 1.108 | 0.016 | 0.127 | 1.455 | 0.050 | 0.357 |
Postnatal ETS | ||||||
Never | 1.005 | 0.005 | Ref. | 1.268 | 0.016 | Ref. |
First in first year | 1.018 | 0.018 | 0.403 | 1.341 | 0.048 | 0.113 |
First after first year | 0.970 | 0.014 | 0.055 | 1.236 | 0.040 | 0.541 |
LRTI | ||||||
Never | 0.984 | 0.008 | Ref. | 1.223 | 0.023 | Ref. |
First in first year | 1.002 | 0.028 | 0.585 | 1.365 | 0.073 | 0.122 |
First after first year | 1.019 | 0.009 | 0.003 | 1.319 | 0.025 | 0.005 |
Number of LRTIs | ||||||
0 | 0.984 | 0.008 | Ref. | 1.223 | 0.023 | Ref. |
1 | 1.021 | 0.013 | 0.016 | 1.308 | 0.039 | 0.051 |
>1 | 1.024 | 0.015 | 0.013 | 1.345 | 0.041 | 0.008 |
Timing of wheeze | ||||||
Never | 0.982 | 0.008 | Ref. | 1.211 | 0.023 | Ref. |
Early/transient | 1.011 | 0.009 | 0.022 | 1.324 | 0.027 | 0.002 |
Late onset | 1.116 | 0.057 | 0.001 | 1.484 | 0.154 | 0.020 |
Persistent | 1.048 | 0.014 | <0.001 | 1.399 | 0.045 | <0.001 |
Number of wheeze episodes | ||||||
0 | 0.982 | 0.008 | Ref. | 1.211 | 0.023 | Ref. |
1 | 1.005 | 0.016 | 0.155 | 1.300 | 0.040 | 0.067 |
>1 | 1.045 | 0.010 | <0.001 | 1.407 | 0.031 | <0.001 |
Inhalant atopy | ||||||
Never | 1.004 | 0.005 | Ref. | 1.276 | 0.016 | Ref. |
First at 1 year | 1.068 | 0.022 | 0.004 | 1.520 | 0.057 | <0.001 |
First at 4 years | 0.989 | 0.012 | 0.239 | 1.233 | 0.032 | 0.272 |
Number of inhalant allergens | ||||||
0 | 1.004 | 0.005 | Ref. | 1.276 | 0.016 | Ref. |
1 | 0.987 | 0.014 | 0.244 | 1.251 | 0.038 | 0.564 |
>1 | 1.040 | 0.017 | 0.043 | 1.386 | 0.051 | 0.035 |
Numbers in bold indicate p<0.05. Rrs6: respiratory resistance at 6 Hz; AX: area under the reactance curve; B: unstandardised regression coefficient; ETS: environmental tobacco smoke; LRTI: lower respiratory tract infection. #: least-significant difference post hoc test.