| |
Total N=1899
n (%) |
| Outcome variables |
|
| RI in the last 12 months |
691 (36.4%) |
| Wheezing ever |
538 (28.3%) |
| Recent Wheeze |
247 (13.0%) |
| Asthma diagnosis |
131 (12.2%)a |
| Predictors |
|
| SHS exposureb: |
|
|
No |
1403 (73.9%) |
| In utero (maternal) |
50 (2.6%) |
| Current |
298 (15.7%) |
|
Both in utero and current |
91 (4.8%) |
| THS exposureb,c: |
|
| No |
1251 (83.4%) |
|
Yes (≥1 per week) |
78 (5.2%) |
| Potential confounders |
|
| Age |
|
| < 6 years |
821 (43.2%) |
|
≥ 6 years |
1073 (56.5%) |
| Genderb |
|
|
Male gender |
1018 (53.6%) |
|
Female |
871(45.9%) |
| Gestational ageb |
|
| <37 weeks |
114 (6.0%) |
|
≥37 weeks |
1736 (91.4%) |
| Complications during pregnancy / birth |
|
| No |
1616 (85.1%) |
|
Yes |
283 (14.9%) |
| Birth weightb |
|
| Low birth weight (<2500g) |
100 (5.3%) |
|
Normal birth weight (≥2500g) |
1701 (89.6%) |
| Breastfeedingb |
|
| No breastfeeding |
670 (35.3%) |
|
<6 months |
688 (36.2%) |
| 6 – 12 months |
413 (21.7%) |
| > 12 months |
108 (5.7%) |
|
Atopic first degree relative |
|
| No |
587 (30.9%) |
|
Yes |
1312 (69.1%) |
| Child at high risk of asthmab |
|
| No |
1141 (60.1%) |
|
Yes |
473 (24.9%) |
| Vitamin D use: |
|
| Never |
1209 (63.7%) |
| Sometimes |
167 (8.8%) |
|
Daily |
523 (27.5) |
| |
Total N=1899
n (%) |
| Potential confounders cont. |
|
| ≥1 siblings |
|
| No |
530 (27.9%) |
|
Yes |
1368 (72.0%) |
| Day care attendance |
|
| No |
285 (15.0%) |
|
Yes |
1614 (85.0%) |
| Highest parental education |
|
| Low |
72 (3.8%) |
| Middle |
530 (27.9%) |
| High |
858 (45.2%) |
|
Academic |
425 (22.4%) |
