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Table 2 Pain history, intensity and duration, of the group with CLBP

From: The influence of fatigue and chronic low back pain on muscle recruitment patterns following an unexpected external perturbation

  Mean SD Maximum Minimum
Maximum level of low back pain in the past year 8.81 1.13 10 7
Number of days without pain in the past year 37.04 51.82 174 0
Number of days with low pain in the past year 149.37 86.12 303 0
Number of days with moderate pain in the past year 119.29 51.94 210 22
Number of days with high pain in the past year 57.04 68.72 262 0
  1. The level of pain was analysed using the numeric rating scale (NRS) for pain (scale from 0 to 10). Low pain was considered a pain that ranged between 1 and 3.9 on the NRS scale, medium pain was considered to be between 4 and 7.9 on the NRS scale, and high pain was considered to be between 8 and 10 on the NRS scale