Table 1

The effect of demographic characteristics on clinically relevant variation in pain over two years*

KOOS Pain

SF-36 Bodily Pain

Characteristic

Prevalence of clinically relevant change

Unadjusted for baseline values

Adjusted for baseline values

Prevalence of clinically relevant change

Unadjusted for baseline values

Adjusted for baseline value

N

%

OR

OR

95% CI

N

%

OR

OR

95% CI

Age

<46†

11/49

22

27/49

55

46–56

17/47

36

1.5

1.1

0.4–3.1

32/47

68

1.2

1.1

0.4–2.8

>56

12/47

26

1.0

0.9

0.3–2.4

34/47

72

1.9

1.7

0.7–4.5

Gender

men†

35/120

29

78/120

65

women

5/23

22

1.2

0.5

0.2–1.8

15/23

65

1.2

1.1

0.4–3.2

BMI (kg/m²)

<25†

10/61

16

34/61

56

25–29.9

22/64

34

2.4

2.0

0.8–4.9

47/64

73

2.3

1.9

0.8–4.3

≥30

7/16

44

4.0

1.8

0.4–7.1

11/16

69

1.4

0.6

0.2–2.5

KOOS = Knee injury and Osteoarthritis Outcome Score, OR = odds ratio, 95% CI = 95% confidence interval, BMI = body mass index.

* All risk factors listed are entered simultaneously in each model.

† Reference category.

Paradowski et al. Health and Quality of Life Outcomes 2005 3:59   doi:10.1186/1477-7525-3-59