| Incidence IRR (95% CI)# | In-hospital mortality OR (95%CI)¶ | |
| Age years | ||
| <40 | 1 | 1 |
| 40–49 | 0.92 (0.89–0.96) | 1.49 (1.24–1.80) |
| 50–59 | 1.27 (1.23–1.31) | 1.82 (1.54–2.16) |
| 60–69 | 2.28 (2.22–2.34) | 1.86 (1.59–2.19) |
| 70–79 | 4.35 (4.24–4.46) | 2.30 (1.97–2.68) |
| ≥80 | 4.60 (4.48–4.71) | 4.15 (3.56–4.83) |
| Sex | ||
| Males | 1 | 1 |
| Female | 1.18 (1.17–1.20) | 1.06 (1.02–1.10) |
| Charlson comorbidity index | ||
| 0 | 1 | 1 |
| 1–2 | 1.05 (1.04–1.07) | 1.81 (1.72–1.90) |
| >2 | 1.47 (1.46–1.48) | 4.08 (3.86–4.32) |
| Year | ||
| 2002 | 1 | 1 |
| 2003 | 1.08 (1.05–1.12) | 0.95 (0.87–1.05) |
| 2004 | 1.09 (1.06–1.12) | 0.83 (0.76–0.92) |
| 2005 | 1.10 (1.07–1.14) | 0.85 (0.77–0.94) |
| 2006 | 1.18 (1.14–1.21) | 0.71 (0.64–0.78) |
| 2007 | 1.28 (1.25–1.32) | 0.65 (0.59–0.72) |
| 2008 | 1.39 (1.35–1.43) | 0.65 (0.58–0.71) |
| 2009 | 1.47 (1.43–1.51) | 0.60 (0.55–0.66) |
| 2010 | 1.68 (1.63–1.72) | 0.57 (0.52–0.62) |
| 2011 | 1.69 (1.64–1.73) | 0.53 (0.49–0.59) |
| CTPA | 1.20 (1.18–1.21) | 0.40 (0.38–0.41) |
| Lung scintigraphy | 0.26 (0.25–0.27) | 0.31 (0.29–0.34) |
The independent variables included in the models are shown in the table. CTPA: computed tomographic pulmonary angiography. #: calculated using multivariate Poisson regression for the dependent variable incidence of hospitalisations; ¶: calculated using logistic regression for the dependent variable in-hospital mortality.