Table 3 Changes in prevalence of wheeze in the last 12 months 2001–2011 stratified by potential modifiers
Stratification | Category | N (%) in 2001 | Unadjusted net change % (95 % confidence Interval) | Adjusted net change % (95 % confidence Interval) |
|---|---|---|---|---|
Gendera | Males | 143 (26.3) | −0.16 (−0.71 to 0.39) | −0.27 (−0.81 to 0.27) |
Females | 184 (28.4) | −0.59 (−1.08 to −0.10) | −0.48 (−0.96 to −0.004) | |
Smoking statusb | Never smoker | 39 (17.6) | −0.25 (−0.81 to 0.31) | −0.35 (−0.95 to 0.24) |
Continuous smoker | 115 (36.4) | −0.22 (−0.85 to 0.40) | −0.22 (−0.83 to 0.39) | |
New smoker (started after 2001) | 9 (26.5) | −0.45 (−2.88 to 2.00) | −0.58 (−2.95 to 1.79) | |
Ex-smoker (gave up after 2001) | 5 (21.7) | −2.00 (−2.91 to −1.02) | convergence not achieved | |
Atopic status (SPT)c | Positive | 111 (35.1) | −0.28 (−1.10 to 0.51) | −0.26 (−1.03 to 0.51) |
Negative | 216 (24.6) | −0.43 (−0.84 to −0.02) | −0.41 (−0.82 to −0.003) | |
Methacholine challengec | Positive | 57 (38.8) | −0.48 (−1.57 to 0.62) | −0.27 (−1.41 to 0.88) |
Negative | 270 (25.8) | −0.37 (−0.76 to 0.01) | −0.39 (−0.76 to −0.01) | |
Nasal allergies including rhinitis in last 12 monthsc | Positive | 98 (49.0) | −1.90 (−2.96 to −0.84) | −1.90 (−3.00 to −0.83) |
Negative | 229 (23.1) | −0.10 (−0.49 to 0.28) | −0.10 (−0.46 to 0.28) |