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. 2012 Apr 25;12:100. doi: 10.1186/1472-6963-12-100

Table 1.

Post-PMV survival rates, by year of PMV onset (%)

Year
Time of follow-up
1998 1999 2000 2001 2002 2003 1998-2003
n = 2,537 n = 3,699 n = 3,770 n = 4,546 n = 5,178 n = 5,752 n = 25,482
3 months 49.7 50.5 49.1 50.8 52.2 54.0 51.4
6 months 40.2 40.3 39.5 39.6 41.5 43.1 40.9
1 year 32.2 31.3 31.0 30.4 32.2 33.7 31.9
2 years 25.8 24.3 24.0 23.3 24.3 25.1 24.4
3 years 23.1 20.3 20.5 20.0 19.5 20.2 20.4
4 years 21.2 17.8 18.3 16.6 16.4 16.7 17.5

PMV prolonged mechanical ventilation