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Table 1 Baseline characteristics of patients enrolled in the trial

From: A randomised controlled trial of preventive spinal manipulation with and without a home exercise program for patients with chronic neck pain

Characteristics Spinal manipulation Spinal manipulation + Home exercise program Attention-control
Mean age (SD), years 36.8 (10.5) 43.3 (10.5) 43.3 (10.9)
Sex = male (%) 39.4% 42.4% 20.7%
Height (SD), m 153.8 (29.9) 155.7 (34.8) 144.9 (33.2)
Weight (SD), kg 65.8 (3.0) 66.1 (3.7) 64.8 (4.1)
Category of pain duration, n (%)    
   1 - Less than 6 months 1 (3.1%) 0 0
   2 - Between 6 months & 1 year 2 (6.2%) 3 (9.1%) 1 (3.7%)
   3 - Between 1 & 2 years 6 (18.8%) 0 7 (25.9%)
   4 - Between 2 & 3 years 7 (21.9%) 7 (21.2%) 4 (14.8%)
   5 - Between 3 & 5 years 4 (12.5%) 6 (18.2%) 5 (18.5%)
   6 - Between 5 & 10 years 5 (15.6%) 4 (12.1%) 8 (29.6%)
   7 - More than 10 years 7 (21.9%) 13 (39.4%) 2 (7.4%)
Mean pain = VAS (SD), cm 3.1 (2.1) 3.8 (2.6) 3.8 (2.5)
Mean disability = NDI (SD) 21.4 (8.8) 22.2 (9.0) 25.6 (10.0)
Mean disability = BQ (SD) 26.4 (10.4) 22.4 (11.7) 27.7 (12.2)
Rotation (SD), ° 117.6 (15.3) 113.0 (21.3) 114.4 (16.2)
Lateral flexion (SD), ° 64.8 (17.9) 59.3 (14.8) 63.4 (13.4)
Flexion-extension (SD), ° 109.7 (19.9) 104.0 (21.4) 100.8 (19.8)
SF-12, physical scale 48.7 (5.6) 50.0 (7.2) 47.3 (7.6)
SF-12, mental scale 45.3 (9.9) 44.8 (9.0) 46.7 (10.4)
FABQ-1, work-related 10.5 (8.7) 10.7 (8.0) 14.1 (7.7)
FABQ-2, physical-activity related 6.6 (5.7) 7.5 (6.2) 7.6 (6.4)
  1. SD = standard deviation, VAS = Visual analog scale, NDI = Neck disability index, BQ = Bournemouth questionnaire, FABQ-1 = Fear-avoidance questionnaire-1 work-related, FABQ-2 = Fear-avoidance questionnaire-2 physical activity-related