Table 2. Multivariate analysis of factors determining outcome.

Prognostic factora	Odds ratio (95% CI)b (n=141)	p value
Smoking	2.5 (1.1 to 5.6)	0.03
Dyspnea at presentation	2.1 (0.9 to 4.8)	0.09
Temperature >38.5°C	2.9 (1.0 to 8.6)	0.05
Plasma creatinine >100 µmol/L	2.0 (0.9 to 4.6)	0.11
Bilateral infiltrates	4.2 (1.7 to 10.3)	0.002
Pleural effusion	3.4 (0.99 to 11.6)	0.053

aPrognostic factors with p≤ 0.05 in the univariate analysis were entered. Factors with p value >0.2 in the multivariate analysis were excluded.
bCI, confidence interval.