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Table 3 Comparison with other study samples from general population and secondary care

From: Absence of low back pain to demarcate an episode: a prospective multicentre study in primary care

Variable General population [8] Chiropractic primary care population [This study] Secondary care [7] (Two study samples)
Proportion of at least 4 consecutive weeks free from bothersome pain during the study period, % (95 % CIa) 83 (78–88) 59 (51–67) 20 (11–29), 18 (13–23)
Proportion women, % 54 49 68, 54
Age mean 50 44 46, 38
Pain intensity 0–10, mean - 4.3 5.3, 4.9
Study period 12 months 6 months 12 months
Text message interval Fortnightly Weekly Weekly
  1. a CI confidence interval