Table 6.
Zero-inflated Poisson model for number of days with runny or stuffy nose in two- years olds due to prenatal air quality and other potential risk factors
| Poisson portion | IRR | p-value | [95% Conf. | Interval] |
|---|---|---|---|---|
| Age groups | ||||
| Age <=26 yrs | Reference | |||
| Age_27 – 29 yrs | 0.919 | 0.000 | 0.891 | 0.948 |
| Age_>29 yrs | 0.775 | 0.000 | 0.747 | 0.804 |
| Maternal education | ||||
| Elementary | Reference | |||
| Medium | 1.096 | 0.000 | 1.045 | 1.150 |
| Higher | 1.108 | 0.000 | 1.060 | 1.159 |
| Maternal atopy | 1.188 | 0.000 | 1.155 | 1.222 |
| Girls | 1.007 | 0.548 | 0.982 | 1.033 |
| Older siblings | 1.382 | 0.000 | 1.356 | 1.409 |
| Wheezing phenotypes | ||||
| No wheezing | Reference | |||
| Transient early wheeze | 1.461 | 0.000 | 1.410 | 1.513 |
| Transient late wheeze | 1.203 | 0.000 | 1.154 | 1.255 |
| Persistent wheezing | 1.803 | 0.000 | 1.730 | 1.878 |
| Prenatal PM2.5 | 1.009 | 0.201 | 0.994 | 1.025 |
| Moldy/damp house | 1.030 | 0.000 | 1.015 | 1.046 |
| Logistic portion | OR | p-value | [95% Conf. | Interval] |
| Age groups | 1.117 | 0.004 | 0.358 | 1.878 |
| Education levels | −0.604 | 0.136 | −1.398 | 0.190 |
| Maternal atopy | 0.535 | 0.425 | −0.779 | 1.850 |
| Girls | 0.258 | 0.656 | −0.879 | 1.396 |
| Older siblings | −1.833 | 0.023 | −3.416 | −0.251 |
| Wheezing phenotypes | −8.180 | 0.998 | −12.360 | 12.324 |
| Prenatal PM2.5 | −0.264 | 0.466 | −0.976 | 0.446 |
| Moldy/damp house | −0.076 | 0.850 | −0.877 | 0.723 |
| _cons | −0.040 | 0.987 | −5.021 | 4.941 |
Age groups: <26 yrs, 27 – 29 yrs, >29 yrs)
Education level (elementary/medium/high)
Maternal atopy (Y/No)
Older siblings (number of older siblings: 0, 1, 2= two or more siblings)
Length at birth (cm)
Prenatal PM2.5 (μg/m3) log-transformed to the basis 2
Moldy/damp house (Y/No)
Prenatal ETS (number of cigarettes smoked daily at home over pregnancy)
Postnatal ETS (number of cigarettes smoked daily at home in the postnatal period)