Table 4

Results for primary outcomes based on WOMAC and SF-36: preintervention (baseline), postintervention (8 weeks) and 6 monthsa

Variables

OAK and control preinterventionb

OAK

Control

Difference in changes between groups


8 weeks

6 months

8 weeks

6 months

Preintervention to 8 weeks

95% CI

Preintervention to 6 months

95% CI


WOMAC

Painc

7.1 (0)

5.5 (0.3)

6.1 (0.3)

7.0 (0.3)

6.7 (0.3)

-1.46

-2.18 to -0.73

-0.49

-1.26 to 0.28

Stiffness

3.6 (0)

3.1 (0.2)

3.1 (0.2)

3.6 (0.1)

3.4 (0.2)

-0.50

-0.91 to -0.08

-0.29

-0.73 to 0.15

Physical Functionc

24.1 (0)

19.1 (0.7)

19.9 (1)

24.4 (0.7)

23.4 (0.9)

-5.55

-7.38 to -3.31

-4.35

-6.20 to -0.91

Totalc

34.9 (0)

27.7 (1.0)

29.2 (1.2)

34.9 (1)

33.3 (1.2)

-7.23

-9.98 to -4.49

-4.08

-7.47 to -0.68

SF-36 (0 to 100)

Physical Functionc

48.0 (0)

54.1 (1.4)

54.2 (1.9)

48.5 (1.4)

48.5 (1.9)

5.61

1.84 to 9.37

5.67

0.40 to 10.93

Role Physicalc

35.7 (0)

47.9 (4.0)

46.0 (4.8)

30.8 (4.0)

38.6 (4.8)

17.06

5.90 to 28.21

7.37

-5.93 to 20.67

Body Painc

46.3 (0)

51.2 (1.9)

50.8 (2.1)

44.0 (1.9)

44.8 (2.2)

7.19

1.93 to 12.44

6.06

0.04 to 12.07

General Health

65.8 (0)

69.2 (1.3)

69.6 (1.7)

67.1 (1.3)

66.0 (1.7)

2.11

-1.45 to 5.67

3.59

-1.19 to 8.37

Vitalityc

54.7 (0)

59.0 (1.5)

60.7 (1.7)

53.0 (1.5)

56.0 (1.8)

6.02

1.87 to 10.16

4.72

-0.11 to 9.55

Social Functionc

73.8 (0)

83.0 (2.2)

77.8 (2.6)

72.3 (2.1)

72.7 (2.6)

10.72

4.81 to 16.62

4.07

-2.08 to 12.22

Role Emotional

61.7 (0)

73.7 (3.9)

70.8 (4.5)

68.5 (3.9)

69.4 (4.5)

5.18

-5.64 to 16.00

1.35

-11.06 to13.76

Mental Health

75.8 (0)

77.0 (1.3)

78.5 (1.5)

74.9 (1.3)

74.7 (1.5)

2.08

-1.42 to 5.58

3.85

-0.21 to 7.91


aOAK: Osteoarthritis of the Knee Self-Management Program. SF-36: Short Form 36 version 1 questionnaire; WOMAC: Western Ontario and McMaster Universities Arthritis Index. bPreintervention values were the same in both groups when the baseline value was used as a covariate. Values were calculated using repeated-measures analysis of covariance with the baseline value of the dependent variable as the covariate. Data are estimated marginal means (SEM) with the mean (95% CI) differences in changes between the groups at each time point. cP < 0.05 for baseline to 6 months.

Coleman et al. Arthritis Research & Therapy 2012 14:R21   doi:10.1186/ar3703

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