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Table 1 Age-specific KOOS scores given as mean, standard deviation, median, (95%CI of the mean) for men (M) and women (W).

From: Knee complaints vary with age and gender in the adult population. Population-based reference data for the Knee injury and Osteoarthritis Outcome Score (KOOS)

KOOS subscales

Mean score, SD, median (95%CI of the mean) in different groups

 

18–34

35–54

55–74

75–84

 

M

W

M

W

M

W

M

W

Pain

N = 60

N = 74

N = 78

N = 80

N = 88

N = 85

N = 34

N = 33

 

92.2

92.1

87.4

88.8

87.7

78.6

83.5

87.1

 

11.2

14.0

17.9

18.7

17.4

25.5

23.3

18.2

 

97.2

97.2

97.2

97.2

97.2

91.7

94.4

96.9

 

(89.8–95.6)

(88.8–95.3)

(83.4–91.5)

(84.6–93.0)

(84.0–91.4)

(73.1–84.1)

(75.3–91.6)

(80.6–93.5)

Symptoms

N = 60

N = 74

N = 78

N = 82

N = 88

N = 85

N = 36

N = 34

 

87.2

89.1

86.5

89.5

88.4

77.1

83.7

88.1

 

13.9

13.5

16.7

14.6

17.3

24.8

19.0

14.2

 

92.9

92.9

92.9

95.8

96.4

85.7

87.5

94.6

 

(83.6–90.8)

(86.0–92.2)

(82.7–90.2)

(86.2–92.7)

(84.8–92.1)

(71.7–82.4)

(77.3–90.1)

(83.1–93.0)

ADL

N = 60

N = 74

N = 78

N = 80

N = 88

N = 85

N = 36

N = 34

 

94.2

95.2

89.1

88.6

86.3

77.4

76.1

82.7

 

10.0

11.6

17.6

19.7

18.8

26.2

24.8

19.5

 

100

100

100

98.5

97.1

91.2

83.1

91.9

 

(91.6–96.7)

(92.5–97.8)

(85.1–93.1)

(84.2–92.9)

(82.3–90.3)

(78.8–83.1)

(67.7–84.5)

(75.9–89.6)

Sport/Rec

N = 60

N = 74

N = 76

N = 80

N = 87

N = 84

N = 35

N = 34

 

85.1

86.4

76.0

79.3

72.6

61.0

56.3

55.9

 

20.8

21.1

29.5

27.7

29.9

36.9

34.7

37.3

 

92.5

95.0

87.5

90.0

80

70.0

55.0

62.5

 

(79.7–90.5)

(81.5–91.3)

(69.2–82.7)

(73.1–85.4)

(66.2–78.9)

(53.0–69.0)

(44.4–68.3)

(42.9–68.9)

QOL

N = 59

N = 74

N = 78

N = 80

N = 88

N = 85

N = 35

N = 33

 

85.3

83.6

77.7

83.4

78.9

68.6

71.1

75.4

 

19.2

20.2

25.4

22.0

25.4

31.4

29.0

26.9

 

93.8

87.5

87.5

93.8

87.5

75.0

75.0

83.3

 

(80.3–90.3)

(78.9–88.3)

(72.0–83.5)

(78.5–88.3)

(73.5–84.3)

(61.8–75.4)

(61.1–81.0)

(65.9–85.0)