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Table 1 Subject characteristics for the present group of male and female LBP patients

From: Reliability and measurement error of frontal and horizontal 3D spinal motion parameters in 219 patients with chronic low back pain

   Male (n = 87) Females (n = 132)
  Mean (SD) 95 % CI Range Mean (SD) 95 % CI Range
Age (years) 44.7 (11.3) [42.7 - 47.1] 22-64 45.9 (11) [43.9 - 47.8] 22-65
Height (cm) 178 (6.3) [176–179.3] 164-196 163.3 (8.3) [161.3 - 164.7] 133-183
Weight (kg) 89.2 (15.2) [87.2 - 92.4] 66-159 75.1 (16.7) [73.1 - 77.9] 45-133
BMI 28.1 (4.7) [26.1 – 34] 19.3-49.6 28.2(6.2) [26.2 - 29.3] 18.7-47.2
Activity level 2.4 (1.3) [0.4 - 2.9] 0-4 2.4 (1.2) [0.4 - 2.6] 0-4
Past episodes of back pain 3.4 (0.6) [1.4 - 4.1] 1-4 3.2(0.9) [1.2 - 3.5] 0-4
S1 LBP past week 5.1 (1.6) [3.1 - 6.2] 3-9 5.2 (1.6) [3.2 - 5.5] 3-10
S2 LBP past week 5.3 (1.6) [3.3 - 6.4] 2-8 5.1 (1.8) [3.1 - 5.4] 2-10
S1 LP past week 2.1 (2.4) [0.1 - 2.5] 0-9 2.3 (2.6) [0.3 - 2.7] 0-10
S2 LP past week 2.0 (2.5) [0–2.4] 0-8 2.1 (2.5) [0.1 - 2.5] 0-10
S1 Roland Morris (0–23) 8.1 (4.4) [6.1 - 9.8] 2-17 8.8 (4.3) [6.8 - 9.5] 1-21
S2 Roland Morris (0–23) 8.0 (5.0) [6–9.7] 0-23 8.7 (4.9) [6.7 - 9.5] 0-21
  1. CI, confidence interval; SD, standard deviation
  2. Activity level: Engaged in exercise or sports activities in the past month? (0 = I do not engage in exercise or sports, 1 = Less than once a week, 2 = Once a week, 3 = 2 or 3 times per week, 4 = 4 times or more per week)
  3. Past episodes of LBP: An episode is a week with at least some LBP (0 = None, 1 = 1–2 episodes, 2 = 3–5 episodes 3 = More than 5 episodes, 4 = 1 single episode of continuous LBP)
  4. (S) = session, (LP) = leg pain, (LBP) = low back pain (measured on a numerical pain scale “one to ten”, ten being the worst possible pain)