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Table 1 Pre-operative Characteristics

From: Opioid prescribing practices prior to elective foot and ankle surgery: a population-based evaluation using health administrative data from a tertiary hospital in Canada

  Preoperative Classification based on Community-Dispensing of Opioids via the Pharmaceutical Information Network (PIN) P-value
Opioid Naive
(n = 55)
Intermittent Opioid Users
(n = 26)
Long-term Opioid Users
(n = 19)
Mean Age (SD) 61.5 (12.9) 61.8 (13.1) 60.3 (10.1) 0.93
Sex, n (%)
 Female 25 (45.5) 11 (42.3) 10 (52.6) 0.77
 Male 30 (54.5) 15 (57.7) 9 (47.4)
Mean BMI (SD) 31.2 (5.5) 33.2 (6.7) 35.1 (7.4) 0.05
Smoking history, n (%) 5 (9.1) 8 (30.8) 4 (21.1) 0.04
Comorbidities, n (%)
 0–1 18 (32.7) 7 (26.9) 2 (10.5) 0.41
 2–4 31 (56.4) 17 (65.4) 15 (78.9)
  > 4 6 (10.9) 2 (7.7) 2 (10.5)
  1. T-test or Wilcoxon ranks sum test was used for Age and BMI (continuous), and Chi-square test or Fisher’s exact test was used for categorical covariate as appropriate
  2. Legend: SD Standard Deviation