Table 3.
Risk factor | Odds ratio | Confidence interval (95%) | P‐value |
---|---|---|---|
Age (10 years) | 1.40 | 0.84–2.35 | 0.20 |
Sex (female) | 1.02 | 0.40–2.65 | 0.96 |
Prednisolone‐equivalent total dose (1000 mg)* | 1.42 | 1.14–1.77 | <0.01 |
Maximal daily dose (100 mg) | 2.22 | 1.44–3.41 | <0.01 |
Duration of treatment (weeks) | 1.59 | 1.16–2.18 | <0.01 |
Lg10 antibody titre† | 2.51 | 0.96–6.60 | 0.06 |
Hospital* | |||
Hospital 1 (n = 5) | 0.58 | 0.06–5.81 | 0.64 |
Hospital 2 (n = 17) | 3.29 | 0.97–11.11 | 0.06 |
Hospital 3 (n = 16) | 3.83 | 1.09–13.45 | 0.04 |
Hospital 4 (n = 33) | 1.0 | (Reference category) |
*In a multivariate analysis of all factors with P < 0.1, only ‘prednisolone‐equivalent total dose’ remained statistically significant. In a model with ‘prednisolone‐equivalent total dose’ and ‘hospital’, the overall significance of ‘hospital’ becomes P = 0.70.
†The antibody titre was not measured for eight persons.