Table 5.
Asthma, bronchial hyperresponsiveness and atopy in the two birth cohorts.
| Variables | Ribeirão Preto | São Luís | P value | ||
|---|---|---|---|---|---|
| n | % weighted* | n | % weighted* | ||
| Wheezing in the last 12 months | 0.957 | ||||
| Yes | 60 | 18.0 | 58 | 17.8 | |
| No | 268 | 82.0 | 270 | 82.2 | |
| Missing | - | - | 2 | - | |
| Bronchial hyperresponsiveness ** | 0.069 | ||||
| Yes | 135 | 39.6 | 111 | 32.5 | |
| No | 193 | 60.4 | 219 | 67.5 | |
| Asthma *** | 0.209 | ||||
| Yes | 34 | 10.2 | 25 | 7.3 | |
| No | 294 | 89.8 | 305 | 92.7 | |
| Atopy **** | < 0.001 | ||||
| Positive | 142 | 44.3 | 81 | 25.3 | |
| Negative | 185 | 55.7 | 242 | 74.7 | |
| Missing | 1 | - | 7 | - | |
Ribeirão Preto, 2004/05 and São Luís, 2005/06.
* Percentages may not add to 100% because of rounding. Missing values were excluded from percentages and P-value calculations.
** PC20 ≤2 mg/ml
*** Asthma defined by a subjective criterion (wheezing in the last 12 months) plus an objective criterion (bronchial hyperresponsiveness)
**** Atopy was defined as at least one positive skin test for some allergens