Table 1.
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