Table 2 Changes in SF-36 scores Changes in SF-36 scores from 6 months to 2 years after ICU discharge (paired t-tests). Difference in scores at 6 months between patients lost to 2-year follow-up and patients answering after 2 years (t-tests).

All, 6 months

100

54.8 (24.1)

59.7 (32.6)

31.8 (40.2)

59.3 (46.1)

64.3 (30.5)

59.8 (30.7)

48.5 (21.1)

73.5 (18.4)

All, 2 years

100

54.7 (25.3)

63.3 (32.0)

40.8 (40.6)

62.0 (43.2)

72.0 (28.1)

60.4 (30.7)

51.1 (20.5)

71.4 (18.3)

Difference 95% CI

- 0.1

- 4.3 to 4.0

+ 3.6

- 0.4 to 7.8

+ 9.0

0.26 to 17.7

+ 2.7

- 6.0 to 11.3

+ 7.7

2.7 to 12.8

+ 0.6

- 5.2 to 6.5

+ 2.6

- 1.4 to 6.6

- 2.1

- 5.5 to 1.2

Medical, 6 months

26

51.9 (24.8)

66.2 (31.2)

40.4 (45.9)

61.5 (42.9)

62.7 (31.4)

59.8 (30.0)

48.5 (21.2)

72.8 (17.6)

Medical, 2 years

26

54.5 (23.9)

72.1 (28.5)

50.0 (41.8)

62.8 (43.6)

76.0 (28.2)

60.5 (27.9)

53.7 (15.8)

71.4 (15.0)

Difference

95% CI

+ 2.6

-5.7 to 10.9

+ 5.9

-0.9 to 12.8

+ 9.6

-9.1 to 28.4

+ 1.3

-10.4 to 13.0

+ 13.3

1.1 to 25.5

+ 0.7

-9.8 to 11.1

+ 5.2

-2.3 to 12.7

-1.4

-8.6 to 5.8

Surgical, 6 months

74

55.8 (24.0)

57.4 (32.9)

28.7 (37.9)

58.6 (47.4)

64.9 (30.4)

59.7 (31.2)

48.4 (21.2)

73.8 (18.8)

Surgical, 2 years

74

54.7 (26.1)

60.2 (32.8)

37.5 (40.0)

61.7 (43.4)

70.6 (28.1)

60.4 (31.8)

50.1 (21.9)

71.4 (19.5)

Difference 95% CI

-1.1

-6.0 to 3.8

+ 2.8

-2.0 to 7.6

+ 8.8

-1.3 to 18.9

+ 3.1

-7.9 to 14.3

+ 5.7

0.3 to 11.2

+ 0.7

-6.5 to 7.8

+ 1.7

-3.2 to 6.6

-2.4

-6.4 to 1.5

26 patients lost at 2 years, 6 months

47.6 (19.9)

45.6 (31.6)

18.3 (27.0)

33.3 (41.9)

56.7 (26.3)

47.3 (32.5)

37.3 (19.4)

62.8 (22.5)

100 patients answering twice, 6 months

54.8 (24.1)

59.7 (32.6)

31.8 (40.2)

59.3 (46.1)

64.3 (30.5)

59.8 (30.7)

48.4 (21.1)

73.5 (18.4)

Difference

95% CI (t-test)

+ 7.2

-3.0 to 17.3

+ 14.1

0.0 to 28.2

+ 13.5

0.2 to 26.8

+ 26.0

6.6 to 45.3

+ 7.6

-5.4 to 20.5

+ 12.5

-1.1 to 26.0

+ 11.1

2.1 to 20.2

+ 10.7

2.3 to 19.2