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Table 1 Baseline characteristics of the participants by study groups

From: Effectiveness and cost-effectiveness of neuromuscular exercise and back care counseling in female healthcare workers with recurrent non-specific low back pain: a blinded four-arm randomized controlled trial

Characteristic

Combined (n = 53)

Exercise (n = 57)

Counseling (n = 55)

Control (n = 54)

Total (n = 219)

Missing (n)

Age (years): mean (sd)

45.1 (6.2)

47.2 (7.4)

46.4 (6.4)

46.7 (7.2)

46.4 (6.8)

0

Years working at current job: mean (sd)

12.1 (9.2)

12.2 (9.3)

9.1 (7.0)

12.4 (9.4)

11.4 (8.8)

2

Civil status: % single

45.3

33.3

32.7

29.6

35.2

0

Education: % secondary school or less

32.1

35.1

49.1

42.6

39.7

0

Shift work: % yes

71.7

64.9

75.9

66.7

69.7

1

Profession:

 % nurses’ aids

37.7

40.4

41.8

42.6

40.6

0

 % nurses

56.6

45.6

47.3

37.0

46.6

0

 % other

5.7

14.0

10.9

20.4

12.8

0

Work stress, effort-reward imbalance (range 0.2–5): mean (sd)

1.6 (0.5)

1.5 (0.5)

1.7 (0.4)

1.6 (0.5)

1.6 (0.5)

2

Support from superior (range 0–4): mean (sd)

3.3 (0.8)

3.4 (0.7)

3.3 (0.9)

3.6 (0.8)

3.4 (0.8)

1

Work ability index, short form (score 3–27): mean (sd)

21.9 (2.8)

22.0 (2.8)

22.2 (2.8)

22.3 (2.3)

22.1 (2.6)

0

Current smoker: % yes

32.1

19.3

32.7

29.6

28.3

0

Body mass index: mean (sd)

27.1 (5.3)

25.3 (3.9)

26.9 (4.2)

26.4 (4.0)

26.4 (4.4)

3

aMeets physical activity recommendation for health: (%)

29.4%

26.4%

20.0%

28.8%

26.2%

13

Muscular fitness: Modified push-ups, reps: mean (sd)

8.9 (3.8)

8.8 (2.9)

9.2 (3.0)

9.2 (2.6)

9.0 (3.1)

6

  1. a objective assessment with accelerometer [45] for 7 days (accepted for analysis if worn minimum 4 days and 10 h/day): aerobic physical activity at least three times per week amounting to at least 150 min of moderate activity or 75 min of vigorous activity (or combination of both), accumulated bouts of at least 10 consecutive minutes