Table 2 Multiple logistic regression analysis using all studies in UK and Australia, as for Table 1, with interaction term (country × year)
From: Systematic review of worldwide variations of the prevalence of wheezing symptoms in children
Variable | Odds Ratio (95% CI) | p-value |
|---|---|---|
Country [UK (reference) versus Australia] | 1.406 [1.379, 1.433] | p < 0.0005 |
Year of survey | 1.032 [1.030, 1.034] | p < 0.0005 |
Age of children surveyed | 0.993 [0.989, 0.997] | p = 0.016 |
Parental-response (reference) vs Self-complete | 1.239 [1.197, 1.283] | p < 0.0005 |
ISAAC study [No (reference) versus Yes] | 1.649 [1.609, 1.690] | p < 0.0005 |
Country by Year interaction | 0.938 [0.933, 0.943] | p < 0.0005 |