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Table 3 Multivariable adjusted risk ratios (RRa) for analgesic consumption according to clinical factors

From: Predictors of the use of analgesic drugs 1 year after joint replacement: a single-center analysis of 13,000 hip and knee replacements

 Preoperative (0–3 months)Postoperative (9–12 months)
Any analgesic**Any analgesic**AcetaminophenNSAIDOpioid
Hip replacement
 Laterality:bilateral1.1 (0.999–1.2)0.82 (0.64–1.04)0.34 (0.17–0.68)1.02 (0.77–1.3)0.67 (0.38–1.2)
 Harris Hip Score***
  Poor (< 70)11111
  Fair (70–80)0.77 (0.63–0.94)0.78 (0.54–1.1)0.65 (0.29–1.4)0.91 (0.61–1.3)0.58 (0.22–1.6)
  Good or excellent (> 80)0.49 (0.30–0.82)0.60 (0.28–1.3)1.36 (0.05–2.5)0.72 (0.31–1.7)
Knee replacement
 Laterality:bilateral1.1 (1.02–1.2)0.86 (0.77–0.96)0.77 (0.62–0.96)0.91 (0.78–1.1)0.56 (0.42–0.76)
 UKA (vs TKA)0.72 (0.61–0.84)0.83 (0.69–1.002)0.45 (0.28–0.72)0.99 (0.79–1.2)0.52 (0.32–0.85)
 KSS Knee Score***
  Poor (< 60)11111
  Fair (60–70)0.81 (0.71–0.92)0.94 (0.82–1.1)0.83 (0.62–1.1)1.03 (0.86–1.2)0.73 (0.50–1.05)
  Good or excellent (> 70)0.78 (0.64–0.95)0.88 (0.70–1.1)0.81 (0.52–1.3)0.94 (0.70–1.3)0.82 (0.49–1.4)
 KSS Function Score***
  Poor (< 60)11111
  Fair (60–70)0.94 (0.84–1.1)1.03 (0.90–1.2)1.3 (1.02–1.7)0.90 (0.73–1.1)0.91 (0.65–1.3)
  Good or excellent (> 70)0.90 (0.82–0.99)0.89 (0.80–1.00)0.95 (0.75–1.2)0.97 (0.83–1.1)0.73 (0.55–0.97)
  1. RR (95% CI) adjusted with age (continuous), gender, Charlson Comorbidity Index, BMI (continuous), laterality (unilateral vs bilateral), and use of antidepressant 1 year before surgery
  2. **Acetaminophen, NSAID, opioid
  3. ***Preoperative HHS missing on 2138 (34.3%) patients and KSS Knee Score on 2617 (34.9%) patients and KSS Function Score on 2645 (35.3%) patients