Table 4– Multivariate analysis: variables associated with mechanical ventilation
OR (95% CI)p-value
Smoking1.99 (1.34–2.94)0.001
Solid cancer0.42 (0.2–0.87)0.019
Serotype 32.97 (1.84–4.8)<0.001
Serotype 19A2.43 (1.25–4.72)0.001
Serotype 19F3.3 (1.32–8.21)0.010

  • Odds ratios were adjusted for sex, smoking, alcohol consumption, previous pneumococcal vaccination, period of influenza epidemic, serotypes (1, 3, 19A, 19F and 23F) and comorbidities associated with mechanical ventilation (solid cancer).