Weighted multivariable associations between socioeconomic position and non-allergic asthma
| Adjustment | Socioeconomic position | OR | (95% CI) | P trend |
| Confounders* | ||||
| High | 1.00 | (Baseline) | <0.001 | |
| Middle | 1.32 | (1.01 to 1.70) | ||
| Low | 1.77 | (1.30 to 2.40) | ||
| Confounders*+BMI z-score+BMI z-score² | ||||
| High | 1.00 | (Baseline) | <0.001 | |
| Middle | 1.28 | (0.99 to 1.66) | ||
| Low | 1.72 | (1.27 to 2.33) | ||
| BMI | 1.00 | (0.91 to 1.10) | <0.05 | |
| +BMI² | 1.05 | (1.01 to 1.10) | ||
| Confounders*+WC+WC2 | ||||
| High | 1.00 | (Baseline) | <0.001 | |
| Middle | 1.32 | (1.02 to 1.71) | ||
| Low | 1.76 | (1.29 to 2.40) | ||
| WC | 0.80 | (0.65 to 0.98) | <0.05 | |
| +WC² | 1.00 | (1.00 to 1.00) | ||
| Confounders*+WHtR†+ WHtR²† | ||||
| High | 1.00 | (Baseline) | <0.001 | |
| Middle | 1.33 | (1.02 to 1.73) | ||
| Low | 1.77 | (1.30 to 2.40) | ||
| WHtR | 0.04 | (0.00 to 0.57) | <0.05 | |
| +WHtR² | 1.39 | (1.08 to 1.80) |
*Confounders are sex, ethnicity, caesarean, firstborn, smoke in utero, smoke infancy and breast feeding.
†WHtR values presented as 1/10 WHtR.
BMI, body mass index; WC, waist circumference; WHtR, waist-to-height ratio.