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Table 2 Demographic and clinical characteristics of respondents at baseline

From: Primum non nocere: shared informed decision making in low back pain – a pilot cluster randomised trial

 

Decision support package

Usual care

n

(%)

n

(%)

No. of participants

85

(57.4)

63

(42.6)

Age, years

    

 Mean (SD)

46.9

(13.8)

48.8

(16.7)

 Median (IQR)

47.6

(36.1, 56.9)

46.8

(33.5, 63.4)

Sex:

    

 Male

28

(32.9)

22

(34.9)

 Female

57

(67.1)

41

(65.1)

Ethnicity:

    

 White

71

(83.5)

56

(88.9)

 Mixed

3

(3.5)

2

(3.2)

 Asian or Asian British

7

(8.2)

3

(4.8)

 Black or Black British

3

(3.5)

2

(3.2)

 Chinese

1

(1.2)

0

(0.0)

Currently working:

    

 Yes

45

(52.9)

35

(55.6)

 No:

40

(47.1)

28

(44.4)

  Retired

13

(31.7)

14

(46.7)

  Stay at home

4

(9.8)

3

(10.0)

  Unable to work due to low back pain

8

(19.5)

8

(26.7)

  Unable to work due to other illness

6

(14.6)

2

(6.7)

  Unemployed and looking for work

3

(7.3)

1

(3.3)

  In full time education

2

(4.9)

0

(0.0)

  Others

5

(12.2)

2

(6.7)

Hours of paid work per week:

    

 No. of participants

49

 

38

 

 Mean (SD)

31.8

(12.6)

30.2

(12.4)

 Median (IQR)

37

(25, 40)

35

(21, 39)

Pain in lower back pain in the last four weeks:

 Yes

85

(100.0)

63

(100.0)

If Yes:

    

 Pain limit usual activities for more than one day:

  Yes

70

(84.3)

54

(85.7)

  No

13

(15.7)

9

(14.3)

 Frequency of lower back pain:

    

  On some days

4

(4.7)

4

(6.4)

  On most days

13

(15.3)

12

(19.1)

  Everyday

68

(80.0)

47

(74.6)

 The length of time since free of low back pain for one whole month:

  < 3 months ago

23

(27.4)

21

(33.3)

  ≥ 3 months ago but < 7 months ago

18

(21.4)

5

(7.9)

  ≥ 7 months ago but < 3 years ago

26

(31.0)

24

(38.1)

  ≥ 3 years ago

17

(20.2)

13

(20.6)

Pain down the leg:

    

 Yes

62

(72.9)

46

(73.0)

 No

23

(27.1)

17

(27.0)

If Yes:

    

 Pain spread below the knee:

    

  Yes

38

(62.3)

27

(58.7)

  No

23

(37.7)

19

(41.3)

Roland Morris disability questionnaire (0–24, 0 = best)

 No. of participants

85

 

63

 

 Mean (SD)

10.66

5.9

10.6

5.3

 Median (IQR)

11.0

(6.0, 14.0)

11.0

(6.0, 14.0)

Modified Von Korff disability score (0–100, 0 = best)

 No. of participants

84

 

62

 

 Mean (SD)

61.3

23.9

56.8

26.0

 Median (IQR)

65.0

(48.3, 80.0)

58.3

(40.0, 76.7)

Modified Von Korff pain score (0–100, 0 = best)

 No. of participants

84

 

63

 

 Mean (SD)

68.5

20.3

67.1

17.2

 Median (IQR)

73.3

(53.3, 83.3)

70.0

(56.7, 80.0)

Norm-based physical component score of SF-12 (0–100, 100 = best)

 No. of participants

85

 

55

 

 Mean (SD)

34.6

9.5

35.1

9.0

 Median (IQR)

33.5

(27.2, 42.8)

34.3

(29.0, 40.0)

Norm-based mental component score of SF-12 (0–100, 100 = best)

 No. of participants

85

 

55

 

 Mean (SD)

42.6

12.8

44.4

12.2

 Median (IQR)

42.7

(34.8, 53.6)

44.9

(37.2, 54.2)

Hospital anxiety and depression scale: anxiety (0–21, 0 = best)

 No. of participants

83

 

60

 

 Mean (SD)

7.6

4.4

7.5

4.2

 Median (IQR)

7.0

(4.0, 11.0)

7

(4.5, 11.5)

Hospital anxiety and depression scale: depression (0–21, 0 = best)

 No. of participants

82

 

59

 

 Mean (SD)

7.2

4.7

7.2

5.0

 Median (IQR)

6.5

(4.0, 10.0)

7

(3.0, 11.0)

Pain self-efficacy questionnaire (0–60, 60 = best)

 No. of participants

82

 

61

 

 Mean (SD)

34.2

15.6

31.5

14.8

 Median (IQR)

37.0

(24.0, 44.0)

32.0

(19.0, 45.0)

Fear avoidance beliefs questionnaire (0–24, 0 = best)

 No. of participants

85

 

59

 

 Mean (SD)

14.3

5.9

15.5

5.5

 Median (IQR)

15

(10.0, 18.0)

17

(12.0, 19.0)

  1. Abbreviations: SD standard deviation; IQR interquartile range.