Results of the multiple logistic regression analysis for qualified candidate variables
| Adjusted odds ratio | p-value | 95% CI | |
| Age (continuous) | 1.02¶ | 0.026 | 1.0–1.04 |
| Renal comorbidity | 5.1 | 0.057 | 1.0–26.7 |
| Cardiac comorbidity | 2.7 | 0.028 | 1.1–6.4 |
| Infiltrate other than alveolar | 2.5 | 0.008 | 1.3–5.0 |
| Age≥70 yrs | 2.0 | 0.033 | 1.1–3.9 |
| Renal comorbidity | 5.0 | 0.057 | 1.0–26.5 |
| Cardiac comorbidity | 2.9 | 0.014 | 1.2–6.9 |
| Interaction analysis# | |||
| Age versus renal¶ | 0.114 | ||
| Age versus cardiac¶ | 0.004 | ||
| Age versus infiltrate¶ | 0.008 | ||
| Renal versus cardiac¶ | 0.110 | ||
| Renal versus infiltrate¶ | 0.657 | ||
| Cardiac versus infiltrate¶ | 0.055 |
CI: confidence interval
Adjusted odds ratios are reported for the risk of undiagnosed episode of community-acquired pneumonia
#: for categorised variable age
¶: odds ratio for continuous variable