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Table 2 Incidence of Chronic Back Pain over 11-year Follow-up

From: Do medical conditions predispose to the development of chronic back pain? A longitudinal co-twin control study of middle-aged males with 11-year follow-up

Risk Factor Individual-level analysisa Individual-level analysis (also adjusting for comorbidity score)b Within-pair analysis
OR (95% CI) p-value OR (95% CI) p-value OR (95% CI) p-value
Arthritis n = 2770 n=2745c n = 248 (124 pairs)
1.8 (1.4–2.2) < 0.001 1.7 (1.3–2.2) < 0.001 0.9 (0.4–1.8) 0.72
Diabetes n = 2776 n = 2748d n = 248 (124 pairs)
1.2 (0.8–1.9) 0.33 1.2 (0.8–1.9) 0.46 0.7 (0.2–2.4) 0.53
Hypertension n = 2770 n = 2745d n = 248 (124 pairs)
1.3 (1.0–1.5) 0.04 1.2 (0.9–1.5) 0.14 1.3 (0.6–2.6) 0.48
Coronary Artery Disease (CAD) n = 2771 n = 2744d n = 248 (124 pairs)
1.6 (1.0–2.3) 0.05 1.5 (0.9–2.3) 0.09 2.0 (0.5–8.0) 0.33
Overall Comorbidity Burden
Medical comorbidity score n = 2740 n = 240 (120 pairs)
1.2 (1.1–2.3) < 0.001 1.1 (0.9–1.4) 0.32
  1. Associations between medical conditions and incident chronic back pain, in those without physician-assessed back problems at baseline *
  2. Items in bold are statistically significant at p < 0.05
  3. Sample sizes indicate # of individuals with complete data for these variables, and within-pair analyses are restricted to pairs with complete data for all variables
  4. aModels adjusting for age, race, education
  5. bModels adjusting for age, race, education, and comorbidity score
  6. cModel adjusting for age, race, education, and comorbidity score (arthritis not included in calculation of comorbidity score)
  7. dModel adjusting for age, race, education, and comorbidity score (diabetes, hypertension, and CAD not included in calculation of comorbidity score)