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Table 1 Individual patient characteristics (T1) and “caring” procedure

From: Chronic low back pain among French healthcare workers and prognostic factors of return to work (RTW): a non-randomized controlled trial

Individual patient characteristics Non-HCW HCW Total p-value
  N = 118 N = 99 N = 217  
Sociodemographic factors
 Age [y, mean (SD)] 42.03 (9.32) 40.49 (9.72) 41,33 (9.51) 0.2361
 Age (classes) (%)
 20–29 11.02 % 18.18 % 14.29 % /
 30–39 27.12 % 25.25 % 26.27 %  
 40–49 41.53 % 37.37 % 39.63 %  
 50–59 19.49 % 18.18 % 18.89 %  
 60–69 0.85 % 1.01 % 0.92 %  
Sex (%)
 Female 27.12 % 87.88 % 54.84 % < 0.001
 Male 72.88 % 12.12 % 45.16 %  
Conjugal relationship with or without child (%)
 Yes 48.18 % 40.91 % 44.95 % 0.3067
 No 51.82 % 59.09 % 55.05 %  
Socio-occupational factors
 Sick leave before inclusion on the study [days, mean (SD)] 174.13 (185) 93.45 (132) 136.93(168) 0.0002
Work Satisfaction (%)
 Yes 74.44 % 82.89 % 78.31 % 0.1881
 No 25.56 % 17.11 % 21.69 %  
Clinical factors
 BMI [kg/m2, mean (SD)] 24.67 (4.58) 24.04 (4.62) 24.39 (4.60) 0.3365
 Weight [kg, mean (SD)] 73,95 (15.90) 66,61 (13.64) 70,63 (15.33) 0.0005
 Height [cm, mean (SD)] 172.48 (9.53) 166.30 (8.40) 169.75 (9.54) <0.0001
 Cigarette Smoking [packs years, mean (SD)] 5.91 (9.70) 1.86 (4.54) 4.06 (8.01) 0.0009
 Visual Analogic Pain Scale VAPS [mean (SD)] 4.53 (2.04) 3.33 (2.35) 3.99 (2.26) 0.0001
 Duration of Pain [months, mean (SD)] 91.83 (93.04) 71.92 (82.66) 82.80 (88.84) 0.1011
 Finger-Tip Score [cm, mean (SD)] 20.45 (14.73) 15.73 (17.40) 18.31 (16.13) 0.0054
 Schober Index [cm, mean (SD)] 3.23 (1.42) 3.24 (1.15) 3.23 (1.30) 0.6855
Comorbidity (%)
 No-one 47.66(%) 60.00(%) 53.13(%) 0.1756
 Others (cardiovascular, musculoskeletal…) 32.71(%) 28.24(%) 30.73(%)  
 Phsychiatric Disorders 19.63(%) 11.76(%) 16.15(%)  
History of lumbago (%)
 Yes 53.10 % 56.38 % 54.59 % 0.6364
 No 46.90 % 43.62 % 45.41 %  
History of sciatica (%)     
 Yes 38.94 % 48.39 % 43.20 % 0.1731
 No 61.06 % 51.61 % 56.80 %  
Psychosocial factors and impact of pain
 FABQ Activity [mean (SD)] 16.48 (6.13) 14.29 (7.49) 15.49 (6.85) 0.0517
 FABQ Work [mean (SD)] 27.96 (11.88) 24.56 (10.64) 26.41 (11.42) 0.0698
 QUEBEC [mean (SD)] 37.35 (15.67) 31.97 (19.53) 34.91 (17.67) 0.0615
 HAD Anxiety Scale [mean (SD)] 10.08 (4.26) 9.01 (4.48) 9.60 (4.38) 0.1266
 HAD Depression Scale [mean (SD)] 7.62 (5.33) 6.07 (3.82) 6.92 (4.75) 0.0345
 DALLAS Anxiety/Depression [mean (SD)] 42.47 (26.77) 33.92 (26.13) 38.61 (26.74) 0.0412
 DALLAS Work and Leisure [mean (SD)] 58.28 (20.42) 51.68 (24.85) 55.30 (22.70) 0.0637
 DALLAS Daily Activities [mean (SD)] 60.54 (16.62) 52.58 (21.38) 56.95 (19.27) 0.0098
 DALLAS Sociability [mean (SD)] 33.89 (26.47) 24.26 (20.25) 29.54 (24.28) 0.0110
Interventions
Workplace interventions  
 Yes 49.5 % (58) 49.5 %(49) 55,36 %  
 No 50.5 % (60) 50.5 % (50) 44,64 %  
Physiotherapy
 None 6.06 % 5.13 % 5.65 % 0.0125
 Trained Physiotherapist 54.55 % 33.33 % 45.20 %  
 Not Trained Physiotherapist 39.39 % 61.54 % 49.15 %  
 Physiotherapy [number of sessions, mean (SD)] 24.30 (31.94) 20.55 (12.11) 22.68 (25.36) 0.8205
  1. Comparison of means by Student’ test or Wilcoxon’ test. Comparison of % by X 2 test or fisher’ test