Logistic regression analysis on predictors for a confirmed diagnosis of Mycoplasma pneumoniae corrected for multilevel (n = 176), case–control study in Vestfold, Norway, 2011
| Factor | Values (n in group) | Bivariate analysis | Multivariate analysis | ||
|---|---|---|---|---|---|
| OR (95% CI) | P -value | OR (95% CI) | P-value | ||
| Age, years | >35 (ref) (n =140) | 1 | 1 | ||
| 12–35 (n = 130) | 3.3 (2.0 to 3.5) | <0.001 | 2.3 (0.96 to 5.35) | 0.06 | |
| <12 (n = 144) | 6.3 (3.7 to 10.6) | <0.001 | 7.93 (2.9 to 21.7) | <0.001 | |
| Symptom days | >10 (ref) (n = 144) | 1 | 1 | ||
| 7–10 (n = 125) | 4.7 (2.7 to 8.1) | <0.001 | 2.95 (1.13 to 7.7) | 0.03 | |
| 0–6 (n = 119) | 2.7 (1.6 to 4.4) | <0.001 | 1.5 (0.59 to 3.8) | 0.39 | |
| Rhinitis | No (ref) (n = 168) | 1 | 1 | ||
| Yes (n = 88) | 0.34 (0.2 to 0.6) | <0.001 | 0.34 (0.1 to 0.95) | 0.04 | |
| CRP value | <8 (ref) (n = 140) | 1 | 1 | ||
| 8 to 22 (n = 96) | 2.7 (1.6 to 4.5) | <0.001 | 2.05 (0.79 to 5.5) | 0.14 | |
| >22 (n = 116) | 5.4 (3.2–9.3) | <0.001 | 4.0 (1.57 to 10.3) | 0.01 | |
| Temperature>38.0°C | No (ref) (n = 116) | 1 | 1 | ||
| Yes (n = 216) | 3.3 (2.0 to 5.3) | <0.001 | 3.0 (7.1 to 1.35) | 0.008 | |
The following symptoms were associated in the bivariate analysis but not in the multivariate: pathological sounds on pulmonary auscultation and impaired general condition. CRP = C-reactive protein. Ref = reference.