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Table 5 Results from Kaplan Meier 10 year survival analysis for age as stratification variable according to volume groups with 95% confidence interval

From: Hospital volume and the risk of revision in Oxford unicompartmental knee arthroplasty in the Nordic countries -an observational study of 14,496 cases

 

Age groups

Annual Hospital Volume

< 55 yrs.

n = 2424

55-64

n = 5469

65-74

n = 4606

≥75

n = 1997

For all ages (table 2)

n = 14,496

≤11

74 (69.4-78.2)

79 (76.4-82.4)

82 (78.7-85.9)

89 (84.2-94.2)

80 (78.0-82.0)

12-23

74 (67.3-79.7)

81 (78.1-84.1)

87 (84.4-90.0)

87 (82.0-91.2)

83 (80.8-84.4)

24-43

77 (68.8-84.6)

83 (77.5-87.5)

84 (78.7-88.7)

90 (85.5-93.5)

83 (80.2-86.2)

≥44

79 (69.8-88.2)

81 (77.6-85.2)

84 (79.3-88.5)

90 (86.5-92.9)

83 (80.7-85.5)

  1. n numbers