Table II.

Opioid usage outcomes among THA versus TKA patients.

Variable	THA (n = 43)	TKA (n = 49)	p-value
Median postoperative inpatient equivalents of 5 mg oxycodone pills per 24 hrs	7.0 (IQR 10.3 to 3.8)	12.0 (IQR 15.6 to 8.2)	< 0.001*
Mean postoperative equivalents of 5 mg oxycodone pills during last 24 hrs of inpatient stay	6.0 (IQR 12.0 to 3.0)	10.2 (IQR 15.2 to 7.5)	0.009*
Total 90 day equivalents of 5 mg oxycodone pills	100.5 (IQR 163.8 to 65.2)	224.0 (IQR 384.6 to 123.3)	< 0.001*
Request for opioid refill	33%	84%	< 0.001†
Call to surgeon’s clinic for pain related complaint	19%	51%	0.001†
Trips to ED or and/or clinic visit with provider other than surgeon for pain	19%	33%	0.13†
Use of opioids beyond 90 days after surgery	9%	24%	0.05†

THA, total hip arthroplasty; TKA, total knee arthroplasty; IQR, interquartile range; ED, emergency department.

^*Wilcoxon rank-sum.

^†chi-squared test.