Table 3:

Multivariable analysis for prolonged use of gabapentin

	Adjusted OR (95% CI)	p-value
Age	1.00 (1.00, 1.01)	0.59
Gender		<0.001
Male	ref.
Female	1.26 (1.16, 1.36)
Race		0.10
White	ref.
Non-white	0.91 (0.82, 1.02)
Charlson Comorbidity Score		<0.001
0	ref.
1-2	1.09 (0.98, 1.22)
3-4	1.39 (1.22, 1.60)
5+	1.76 (1.52, 2.03)
Concurrent medication use (opioid use)
+/− 7 days around discharge		<0.001
No	ref.
Yes	0.61 (0.56, 0.66)
90-180 days after discharge		<0.001
No	ref.
Yes	3.10 (2.86, 3.36)
Facility type		0.05
Inpatient	ref.
Outpatient	1.15 (1.00, 1.31)
Disposition location		<0.001
Home	ref.
Home under care of organized home health service organization	0.93 (0.85, 1.03)
Transfer to acute care	1.74 (0.82, 3.70)
Skilled nursing Facility	1.80 (1.56, 2.08)
Other	0.28 (0.06, 1.30)
Surgery planned		<0.001
Yes	ref.
No	1.38 (1.19, 1.60)
Care complexity (number of physicians seen in prior 6 months)		<0.001
q1 (1-2)	ref.
q2 (3-12)	0.69 (0.61, 0.79)
q3 (13-18)	0.72 (0.63, 0.82)
q4 (19 or more)	0.79 (0.69, 0.91)
Type of procedure		<0.001
Total Knee Arthroplasty	ref.
Total Hip Arthroplasty	0.85 (0.76, 0.96)
Total Shoulder Arthroplasty/Total Knee Arthroplasty	2.49 (2.19, 2.84)
Lumbar Laminotomy/Lumbar Laminectomy	1.14 (0.99, 1.32)
Cholecystectomy, Laparoscopic	0.80 (0.65, 0.98)
Initial Inguinal Hernia Repair, Open	1.51 (1.22, 1.88)
Total Shoulder Arthroplasty/Total Hip Arthroplasty	3.37 (2.62, 4.33)
Carotid Endarterectomy	2.20 (1.70, 2.85)
Ventral Hernia Repair, Open	5.59 (4.11, 7.61)
Total Shoulder Arthroplasty	3.67 (2.61, 5.18)
Initial Inguinal Hernia Repair, Laparoscopic	1.00 (0.66, 1.53)
Hysterectomy	2.15 (1.40, 3.32)
Prostatectomy, Laparoscopic	2.67 (1.62, 4.39)
Low Anterior Resection, Laparoscopic	2.79 (1.63, 4.78)

OR: Odds Ratio, CI: Confidence Interval, ref: Reference group, q: Quartile