Unadjusted odds ratios (95% CI) for undiagnosed asthma compared with diagnosed asthma according to demographic variables
| Variable | Category | Odds ratio | 95% CI | p value |
|---|---|---|---|---|
| Age | <40 years | 1.0 | ||
| >40 years | 3.5 | 1.7 to 7.7 | <0.001 | |
| Sex | Female | 1.0 | ||
| Male | 1.5 | 0.8 to 2.7 | 0.2 | |
| Marital status | Single | 1.0 | ||
| Married | 1.1 | 0.6 to 2.5 | 0.8 | |
| Birthplace | Australia | 1.0 | ||
| Overseas | 2.6 | 1.3 to 5.1 | <0.01 | |
| Income | ⩾$40 000 | 1.0 | ||
| <$40 000 | 3.8 | 1.8 to 8.3 | <0.001 | |
| Government benefits | No pension | 1.0 | ||
| Pension | 1.7 | 1.0 to 3.2 | 0.05 | |
| Employment | Employed | 1.0 | ||
| Not working | 1.6 | 0.9 to 3.2 | 0.1 | |
| Education | Post school | 1.0 | ||
| High school only | 0.9 | 0.5 to 1.7 | 0.7 | |
| Atopy | Yes | 0.45 | 0.24 to 0.87 | 0.009 |