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Table 1 Sociodemographic and health-related characteristics of the participants in total and stratified by back pain status (n = 395)

From: Prevalence and influencing factors of chronic back pain among staff at special schools with multiple and severely handicapped children in Germany: results of a cross-sectional study

   Chronic back pain in the last 12 months
Sociodemographic factors Total Yes (=1) No (=0) aOR (95%-CI)a
Total 100.0 38.7 61.3  
Age (in years) Mean: 44.9 (SD: 9.9) Mean: 46.3 (SD: 9.0) Mean: 44.0 (SD: 10.4)  
 ≥ 50 39.2 40.7 59.4 2.97 (1.23-7.19)
 40 - 49 28.6 48.7 51.3 4.14 (1.67-10.22)
 30 - 39 22.8 31.1 68.9 1.95 (0.76-4.97)
 < 30 9.4 18.9 81.1 (Reference)
Sex     
 Female 86.8 38.8 61.2 1.07 (0.58-1.95)
 Male 13.2 38.5 61.5 (Reference)
Marital status b     
 Unmarried 36.2 42.7 57.3 1.44 (0.93-2.22)
 Married 63.0 37.0 63.1 (Reference)
Highest level of education b     
 Realschule/Mittlere Reife 29.4 47.4 52.6 1.59 (0.97-2.60)
 Fachhochschulreife/Fachoberschule 25.1 36.4 63.6 1.08 (0.65-1.81)
 Abitur 45.3 34.1 65.9 (Reference)
Profession     
 Educational staff 68.9 43.8 56.3 1.90 (1.19-3.05)
 Teacher 31.1 27.6 72.4 (Reference)
 Health-related factors     
Current smoker b     
 Yes 20.8 52.4 47.6 2.24 (1.32-3.82)
 Not anymore 29.9 39.0 61.0 1.20 (0.74-1.96)
 Never smoked 49.1 32.5 67.5 (Reference)
Alcohol consumption b     
 ≥ 4 times a week 8.6 58.8 41.2 2.29 (1.02-5.14)
 2-3 times a week 24.6 37.1 62.9 0.95 (0.53-1.70)
 2-4 times a month 37.5 36.5 63.5 1.00 (0.60-1.67)
 ≤ Once a month/Never 29.1 36.5 63.5 (Reference)
Body mass index (BMI) b Mean: 24.6 (SD: 5.6) Mean: 25.0 (SD: 7.3) Mean: 24.3 (SD: 4.2)  
 Obesity (BMI ≥ 30) 10.1 35.0 65.0 0.86 (0.43-1.75)
 Overweight (25 ≥ BMI < 30) 24.1 45.3 54.7 1.48 (0.91-2.40)
 Normal weight (BMI < 25) 65.6 36.7 63.3 (Reference)
Days of physical activity per week b Mean: 3.0 (SD: 1.8) Mean: 3.0 (SD: 1.9) Mean: 2.9 (SD: 1.8)  
 0-1 day 21.3 38.1 61.9 0.75 (0.33-1.70)
 2-3 days 42.3 35.9 64.1 0.68 (0.32-1.46)
 4-5 days 24.1 42.1 57.9 0.86 (0.38-1.95)
 6-7 days 8.6 44.1 55.9 (Reference)
Ever had a diagnosed depression/depressive mood b     
 Yes 28.9 52.6 47.4 2.10 (1.34-3.30)
 No 67.3 33.5 66.5 (Reference)
  1. Percentages in the second column ("Total") are column percentages, in the third ("Yes") and fourth column ("No") row percentages.
  2. aaOR: Odds Ratios adjusted for age (continuous) and/or sex; 95%-CI: 95%-Confidence Interval.
  3. bMissing values for marital status n = 3 (0.8%), highest level of education n = 1 (0.3%), smoking status n = 1 (0.3%), alcohol consumption n = 1 (0.3%), BMI n = 1 (0.3%), days of physical activity per week n = 15 (3.8%), and ever had a diagnosed depression/depressive mood n = 15 (3.8%) are not displayed in the table.