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Table 2 Sociodemographics and disease-specific characteristics of study participants

From: Health utilities for chronic low back pain

Variable Healthy participants n = 126 Patients with chronic low back pain n = 32
Sex (% female) 54% 59%
Age in years (mean, SD) 29.95 (9.25) 41.03 (12.85)
Income group (%)   
    <1000 €/month 10% 16%
    1000–2000 €/month 2% 13%
    2000–3000 €/month 56% 48%
    3000–4000 €/month 30% 19%
    >4000 €/month 2% 3%
Having idea of what low back pain is (%) 94% 100%
Friends/family members with low back pain (%) 62% 66%
Family history of LBP (positive, %) - 56%
Disease duration in years (mean, SD) - 15.48 (9.48)
Roland Morris disability index   
    light (%) - 72%
    moderate (%) - 25%
    severe (%) - 3%
Degree health affected productivity while working (0 to 1) (WPAI) (mean, SD) - 0.18 (0.18)
Degree health affected regular activities (0 to 1) (WPAI) (mean, SD) - 0.28 (0.24)
Depressive Symptoms (CES-D)
(mean, SD)
- 12.06 (7.52)
HU own disease (0 to 1) (mean, SD) - 0.93 (0.13)
Pain own disease (100 mm VAS) (mean, SD) - 22.25 (21.60)
  1. SD Standard Deviation, WPAI Work Productivity and Activity Impairment Questionnaire, CES-D Center for Epidemiological Studies Depression Scale, VAS Visual Analogue Scale, − not applicable