Association of asthma with other painkiller use
| <1 day·week−1 OR | ≥1 day·week−1 | ||||
| Unadjusted OR (95% CI) | p-value | Adjusted# OR (95% CI) | p-value | ||
| Ghent | 1.00 | 1.13 (0.30–4.20) | 0.86 | 1.94 (0.37–10.34) | 0.44 |
| Vienna | 1.00 | 0.88 (0.09–8.58) | 0.91 | 0.14 (0.001–14.86) | 0.41 |
| Odense | 1.00 | 2.53 (0.48–13.29) | 0.27 | 3.80 (0.35–41.49) | 0.27 |
| Berlin | 1.00 | 4.70 (0.46–47.92) | 0.19 | 8.02 (0.39–165.49) | 0.18 |
| Palermo | 1.00 | 1.04 (0.29–3.66) | 0.96 | 0.26 (0.02–2.96) | 0.28 |
| Rome | 1.00 | 4.35 (0.47–40.39) | 0.20 | 9.97 (0.69–143.64) | 0.09 |
| Łódź | 1.00 | 3.58 (0.39–33.31) | 0.26 | 8.63 (0.41–183.41) | 0.17 |
| Coimbra | 1.00 | 1.50 (0.34–6.63) | 0.60 | 1.04 (0.18–6.05) | 0.97 |
| Stockholm | 1.00 | 2.42 (0.26–22.51) | 0.44 | 22.11 (0.57–855.75) | 0.10 |
| London | 1.00 | 1.07 (0.25–4.51) | 0.93 | 0.62 (0.11–3.47) | 0.58 |
| Overall | 1.00 | 1.60 (0.94–2.73) | 0.09 | 1.85 (0.79–4.31) | 0.15 |
In testing for heterogeneity (Cochran’s Q) of the combined results that contributed towards the overall mean result, Chi-squared = 3.84 (9 degrees of freedom (df); p = 0.92) for unadjusted values and 11.13 (9 df; p = 0.27) for adjusted values. OR: odds ratio; CI: confidence interval. #: adjusted for age, sex, body mass index, socioeconomic status, smoking and supplement use.