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Table 4 Description of the RCLBP cohort

From: Lumbar segmental mobility disorders: comparison of two methods of defining abnormal displacement kinematics in a cohort of patients with non-specific mechanical low back pain

  Mean sd Range N
Age 40.0 11.2 20–75 106
Body mass index 26.7 4.75 19.8–43.0 85
Years since first LBP episode 8.3 8.0 <1–33 104
Disability score (out of 18) 7.13 4.543 0 – 17 119
Pain level (out of 100) 42.7 25.7 0 – 100 117
Proportion with constant LBP .23 .420 - 106
  1. Notes: RCLBP = recurrent or chronic low back pain. sd = Standard deviation; N = number with complete data. Disability score was assessed on the modified Roland-Morris RM18 (Stratford et al. (1997); Pain level was patient-rated on a horizontal 10 cm visual analog scale.