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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