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Table 4 Outcome measure data from placebo control group at all assessment time-points

From: Determining the feasibility of a trial to evaluate the effectiveness of phototherapy versus placebo at reducing pain during physical activity for people with knee osteoarthritis: a pilot randomized controlled trial 

Measures

Baseline (week 0)

Visit 4 (week2)

Visit 8 (week 4)

4-week follow-up (week 8)

8-week follow-up (week 12)

12-week follow-up (week 16)

N

Mean

SD

N

Mean

SD

N

Mean

SD

N

Mean

SD

N

Mean

SD

N

Mean

SD

SPA (peak pain–baseline pain)

 Pre

10

2.35

0.94

8

0.50

0.76

7

0.00

0.16

 Post

10

1.35

1.00

8

0.63

0.74

7

0.57

1.27

Pain severity

 Worst

10

5.30

2.21

8

3.87

2.17

7

3.00

2.00

10

4.40

2.99

10

4.30

2.67

10

3.70

2.41

 At least

10

1.70

1.83

8

1.13

1.36

7

0.14

0.38

10

2.40

3.06

10

2.30

2.98

10

1.80

3.05

 Average

10

3.80

1.62

8

2.25

1.75

7

1.29

1.25

10

3.40

2.80

10

3.20

2.66

10

2.70

2.67

 Right now

10

2.80

1.99

8

1.50

1.07

7

1.57

2.23

10

3.00

3.37

10

2.70

3.37

10

2.10

2.89

 Index

10

3.4

2.28

8

2.19

1.89

7

1.50

1.86

10

3.30

3.03

10

3.1

2.92

10

2.6

2.75

WOMAC

 Pain

10

7.10

2.38

8

5.38

2.26

7

4.14

2.67

10

6.50

4.25

10

7.10

4.33

10

6.10

4.48

 Stiffness

10

3.00

0.94

8

3.00

1.51

7

2.00

1.16

10

3.60

1.65

10

3.50

1.96

10

2.70

1.89

 Physical Function

10

25.20

6.96

8

21.38

10.03

7

10.71

7.85

10

23.00

20.13

10

24.40

19.12

10

19.10

17.84

 Total

10

35.30

8.98

8

29.75

13.01

7

16.86

10.72

10

33.10

25.00

10

35.00

25.07

10

27.90

23.81

GROC Function

8

7.00

0.76

7

7.86

0.69

10

6.60

2.22

10

6.90

2.38

10

7.60

1.58

GROC Pain

8

6.50

1.07

7

7.71

1.50

10

6.30

2.14

10

6.80

2.30

10

7.20

1.93

Satisfaction

8

9.62

1.60

7

9.57

0.98

10

9.50

2.01

10

8.90

3.04

10

9.30

1.95

6MWT (m)

 Pre

10

321.97

88.53

8

393.37

92.82

7

428.95

90.15

 Post

10

317.77

89.80

8

379.44

80.30

6

433.05

100.56

Pressure pain threshold–mean of peripatellar sites (N)

 Most tender knee

10

51.89

36.27

7

60.29

25.01

 Least tender knee

10

52.70

28.57

7

73.98

62.05

Pressure pain threshold – standard site over tibialis anterior (N)

 Most tender knee

10

38.10

18.87

7

42.64

12.52

 Least tender knee

10

40.20

16.10

7

48.50

18.93

  1. SPA sensitivity to physical activity, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index, 6MWT 6-minute walk test, GROC global rating of change, N Newtons