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Table 1 Characteristics of study population

From: Persistent lumbar radicular and low back pain; impact of genetic variability versus emotional distress

  LBP
n = 106
LRP
n = 95
p value
Age
 Baseline 41.4 (9.2) 41.9 (10.0) n.sa
Women
 Baseline 39.6 (42) 52.6 (50) n.sb
Smoke
 Baseline 33.0 (35) 34.7 (33) n.sb
 5-year follow up 31 (33) 26 (25) n.sb
Pain (VAS) rest
 Baseline 4.7 (2.3) 3.8 (2.5) 0.012a
 5-year follow up 3.7 (2.9) 2.3 (2.2) < 0.001a
Pain (VAS) activity
 Baseline 6.3 (2.2) 5.7 (2.7) n.sa
 5-year follow up 4.7 (3.0) 3.2 (2.8) < 0.001a
Emotional distress (HSCL-10)
 Baseline 2.1 (0.6) 1.8 (0.5) 0.001a
 5-year follow up 1.7 (O.6) 1.5 (0.6) 0.035a
  1. Continual data: mean (SD). Categorical data: Percent (n)
  2. n.s not significant
  3. aUnpaired Student’s test
  4. bPearson Chi square test