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Table 1 Descriptive analysis of baseline variables across Start Back Tool (SBT) categories

From: Relationship between STarT Back Screening Tool and prognosis for low back pain patients receiving spinal manipulative therapy

Variables SBT Category
Low (n = 168) Medium (n = 129) High (n = 107)
Mean age (SD) 45.4 (15.1) 45.9 (15.0) 45.8 (14.1)
Female 54.8% 52.7% 50.5%
Seen practitioner before 47.0% 59.7% 33.6%
Leg Pain
  Above the knee* 25.5% 23.3% 35.5%
  Below the knee 6.0% 10.9% 12.1%
>30 days pain in year 41.1% 41.1% 38.3%
Recurring 69.6% 65.9% 59.8%
Duration
  < 1 month 54.8% 53.5% 61.7%
  13 months 14.3% 14.0% 7.5%
  >3 months 31.0% 32.6% 30.8%
Median Pain (25, 75) ** 5 (4–7) 7 (6–8) 7 (6–9)
Median BQ (25, 75) ** 24 (14–33) 36 (30–44) 45 (34–54)
  1. *P < 0.05 (Chi2 test for trend). **p < 0.001, (Kruskal-Wallis).