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Table 3 shows OR and 95% CI per factor level for on-label pain indication and psychological distress. ICC = intraclass correlation coefficient. σ2 = random intercept variance

From: Over-the-counter analgesics use is associated with pain and psychological distress among adolescents: a mixed effects approach in cross-sectional survey data from Norway

  Odds Ratio CI P
OTCA weekly
 (Intercept) 0.04 0.03–0.04 < 0.001
 Neck and shoulder pain 2 1.09 1.06–1.12 < 0.001
 Neck and shoulder pain 3 1.19 1.15–1.23 < 0.001
 Neck and shoulder pain 4 1.17 1.12–1.23 < 0.001
 Muscle and joint pain 2 1.17 1.14–1.20 < 0.001
 Muscle and joint pain 3 1.37 1.33–1.42 < 0.001
 Muscle and joint pain 4 1.74 1.66–1.83 < 0.001
 Headache 2 1.87 1.79–1.95 < 0.001
 Headache 3 6.74 6.45–7.04 < 0.001
 Headache 4 15.70 14.90–16.56 < 0.001
 Abdominal pain 2 1.26 1.23–1.30 < 0.001
 Abdominal pain 3 1.69 1.63–1.75 < 0.001
 Abdominal pain 4 1.90 1.80–2.00 < 0.001
 HSCL-10 2 1.42 1.38–1.45 < 0.001
 HSCL-10 3 1.69 1.62–1.75 < 0.001
 Victim 1.04 1.00–1.08 0.048
 Bully 1.45 1.35–1.55 < 0.001
Random effects
 σ2 3.29
 ICC 0.01
 N Region 7
 N Year 5
 Observations 297,484
 Marginal R2 / Conditional R2 0.272 / 0.276
OTCA weekly * Sex
 (Intercept) 0.01 0.01–0.01 < 0.001
 Neck and shoulder pain 2 1.12 1.08–1.17 < 0.001
 Neck and shoulder pain 3 1.36 1.31–1.42 < 0.001
 Neck and shoulder pain 4 1.39 1.31–1.46 < 0.001
 Muscle and joint pain 2 0.98 0.95–1.02 0.348
 Muscle and joint pain 3 1.05 1.01–1.09 0.017
 Muscle and joint pain 4 1.21 1.14–1.28 < 0.001
 Headache 2 2.22 2.08–2.37 < 0.001
 Headache 3 7.60 7.12–8.10 < 0.001
 Headache 4 17.86 16.65–19.16 < 0.001
 Abdominal pain 2 1.99 1.91–2.07 < 0.001
 Abdominal pain 3 3.20 3.07–3.35 < 0.001
 Abdominal pain 4 3.07 2.88–3.26 < 0.001
 HSCL-10 2 1.87 1.81–1.92 < 0.001
 HSCL_10 3 2.45 2.35–2.55 < 0.001
 Victim 0.90 0.86–0.94 < 0.001
 Bully 0.55 0.50–0.61 < 0.001
Random effects
 σ2 3.29
 ICC 0.01
 N Region 7
 N Year 5
 Observations 297,484
 Marginal R2 / Conditional R2 0.351 / 0.356