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Table 1 Patient-reported baseline characteristics

From: Prognostic implications of the Quebec Task Force classification of back-related leg pain: an analysis of longitudinal routine clinical data

  Local LBP only LBP + pain above knee LBP + pain below knee LBP + signs of nerve root involvement p-values
For test of any differences across all subgroups
Females, (95% CI) 50% (44–56) 60% (54–67) 61% (56–67) 54% (50–57) 0.01
Age in years, median (IQR) 47 (36–58) 45 (36–56) 52 (40–66) 50 (38–62) <0.001
Duration in months, median (IQR) 16 (6–57) 14 (6–38) 12 (5–47) 7 (3–26) <0.001
Previous episodes, (95% CI) 69% (64–75) 77% (71–83) 74% (69–79) 79% (76–81) 0.02
Pain irritability, (95% CI) 61% (55–68) 73% (66–80) 69% (63–74) 76% (73–80) <0.001
LBP intensity, median (IQR) 5 (4–7) 6 (4–7) 6 (4–7) 6 (5–8) <0.001
Leg pain intensity, median (IQR) 0 4 (3–6) 6 (4–7) 6 (5–8) <0.001 (local LBP not in test)
Activity limitation, median (IQR) 48 (26–66) 57 (39–73) 61 (43–74) 70 (57–83) <0.001
Any sick leave days in last 3 months*, (95% CI) 42% (34–51) 48% (37–59) 46% (37–55) 55% (50–60) 0.04
Depressive symptoms, (95% CI) 12% (8–16) 17% (12–22) 13% (10–17) 20% (18–23) 0.002
Fear of movement, (95% CI) 21% (16–26) 24% (18–29) 20% (16–24) 26% (23–29) 0.09
General health, mean (SD) 56 (24) 53 (22) 50 (23) 50 (23) <0.001
  1. * among those in conventional employment n = 1,002.