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Table 3 Univariate relationships between predictor variables and still receiving an opioid prescription 1 year or more after hip surgery, adjusted for socioeconomic and active duty status

From: Predictors of chronic prescription opioid use after orthopedic surgery: derivation of a clinical prediction rule.

Variable Odds ratio (95% CI) P value Nagelkerke R2
Age 0.99 (0.98, 1.01) 0.88 0.02
Preoperative use of prescription opioids 1.19 (0.96, 1.47) 0.11 0.02
Socioeconomic status (enlisted rank) 0.56 (0.35, 0.89) 0.02* 0.02
Sex (female) 1.54 (1.24, 1.91) < 0.01* 0.03
MTF location for surgery (vs network) 1.13 (0.92, 1.40 0.23 0.02
Insomnia preoperatively 1.23 (0.85, 1.78) 0.27 0.02
Mental health disorder preoperatively 1.45 (1.11, 1.89) < 0.01* 0.02
Substance abuse preoperatively 1.92 91.48, 2.49) < 0.01* 0.04
Chronic pain diagnosis preoperatively 1.41 (0.98, 2.03) 0.06 0.02
Non-opioid-based pain medication prescription preoperatively 0.97 (0.75, 1.27) 0.83 0.02
Health-seeking behavior preoperatively 4.48 (3.05, 6.59) < 0.01* 0.08
At least 3+ visits of hip-related physical therapy preoperatively (based on median) 1.15 (0.93, 1.42) 0.19 0.02
Occurrence of infection after 1.09 (0.15, 7.87) 0.93 0.02
Femoroplasty (cam lesion) 9.95 (0.81, 1.10) 0.50 0.02
Acetabuloplasty (pincer lesion) 0.98 (0.81, 1.21) 0.90 0.02
Labral repair 0.90 (0.77, 1.06) 0.20 0.02
  1. MTF military treatment facility, Network non-military medical facility, * Significant P < 0.05