Table 1.

Comparison of Rates of Prolonged Prophylactic Antimicrobial Use across Surgical Specialties in VA ASCs vs. HOPDs

Surgery Type	Total	n (%) with Antimicrobials	HOPD		ASC
			Total	n (%) with Antimicrobials	Total	n (%) with Prolonged Post-Operative Antimicrobials
Eye	67,778 (25.1%)	254 (0.4%)	64,034	243 (0.38%)	3744	11 (0.29%)
Genitourinary	38,507 (14.3%)	5288 (13.7%)	37,023	5061 (13.67%)	1484	227 (15.30%)
Orthopedics	17,221 (6.4%)	667 (3.9%)	16,712	651 (3.90%)	509	16 (3.14%)
Ear/Nose/Throat	15,661 (5.8%)	1419 (9.1%)	15,054	1381 (9.17%)	607	38 (6.26%)*
General Surgery	13,930 (5.2%)	84 (0.6%)	13,616	75 (0.55%)	314	9 (2.87%)**

Note: Chi-square tests compared the rates of prolonged post-operative antimicrobial use by specialty in hospital outpatient departments (HOPDs) versus ambulatory surgical centers (ASCs) in VA FY16–17 outpatient surgeries. * = p < 0.05, ** = p < 0.001