Table 1. Incidence of pulmonary thromboembolism in necropsies.

	Period 1972-1995	95% CI
Number of deaths	40,998
Necropsies	16,466
Necropsies with PTE	782
Necropsies with lethal PTE	533*
Necropsies with non-lethal PTE	249
Incidence of PTE in necropsies (%)	4.7%	4.4-5.1
Incidence of lethal PTE in necropsies (%)	3.2%*	3.0-3.5
Incidence of non-lethal PTE in necropsies (%)	1.5%	1.3-1.7

^* p = 0.001

c² trend = 14.97; 1 gl

PTE = pulmonary thromboembolism CI = confidence interval.