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Table 2 Summary of primary robust variance estimation meta-regression model predicting proportions leftover of postsurgical opioid prescriptions

From: Leftover opioids following adult surgical procedures: a systematic review and meta-analysis

  b SE t value df 95% CI p
Measurement method 0.082 0.053 1.54 24.33 −0.028, +0.192 0.137
Region −0.006 0.014 0.47 10.50 −0.037, +0.024 0.648
Publication year 0.016 0.007 2.47 2.51 −0.007, +0.040 0.106
Opioids prescribed (MME) −0.0003 0.0002 1.65 6.40 −0.0009, +0.0002 0.147
Surgical type 0.089 0.027 3.26 23.18 +0.033, +0.146 0.003
  1. Results were based on 115 effect sizes drawn from 44 studies. The intraclass correlation (ρ) was set at 0.8
  2. Measurement method (mean, 0; median, 1); region (1, Northeast; 2, Midwest; 3, South; 4, West; 5, Multiple regions; 6, Canada); publication year (centered such that 0, first published study in 2004); surgical type (1, “abdominal/pelvic;” 2, “orthopedic” [including joint/spine, other boney]; 3, “other soft tissue” [including chest/breast, head (dental), other soft tissue])
  3. b unstandardized regression coefficient; SE standard error; CI confidence interval