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Table 1 Baseline socio-demographic characteristics of participants

From: Characteristics of patients with low back and leg pain seeking treatment in primary care: baseline results from the ATLAS cohort study

Socio-demographics (Denominatora) n = 609
Age (years) (609), mean (SD) 50.2 (13.9)
Age categories (609)  
 18–34 91 (14.9)
 35–44 136 (22.3)
 45–54 152 (25.0)
 55–64 138 (22.7)
 65+ 92 (15.1)
Gender (609), Female 381 (62.6)
Current smoker (609) 194 (31.9)
BMI categories (kg/m2) (607)  
 Normal (18.5 to <25) 136 (22.4)
 Overweight (25 to <30) 223 (36.7)
 Obese (30 to <40) 205 (33.8)
 Morbidly obese (40+) 43 (7.1)
Currently in paid job (605) 367 (60.7)
Self-certified time off work or given sick note due to current episode (365)b 144 (39.7)
Duration (days) self-certified off work (106)  
 1 to 3 days 33 (31.1)
 4 to 6 days 29 (27.4)
 7 days 44 (41.5)
Duration (days) given sick note (98)  
 1 to 14 days 53 (53.1)
 15 to 21 days 10 (10.2)
 22–28 days 18 (18.4)
 More than 28 days 18 (18.4)
National statistics socio-economic classification (based on current or most recent paid job) (593)  
 Higher managerial, administrative and professional occupations 129 (21.8)
 Intermediate occupations 158 (26.6)
 Routine and manual occupations 283 (47.7)
 Never worked and long-term unemployed 23 (3.9)
 Back/leg pain interference with work performance (361), mean (SD)b 5.9 (2.9)
Main employment activity (work load)  
 Predominately sitting (>4 h) (448) 143 (31.9)
 Predominately standing (>4 h) (451) 233 (51.7)
 Manual lifting; <10 kg(>4 h) (446) 60 (13.5)
 Manual lifting; >10 kg (>4 h) (445) 42 (9.4)
  1. All figures are frequencies (percentages) unless stated otherwise as mean (SD)
  2. aDenominator varies for some participants due to missing data or not applicable case
  3. bApplicable to only those currently working