Table 3.

T-test of surgical subspecialties to establish the magnitude of change from January–February to November–December.

Ambulatory Surgery Center Type	Average Difference (95% CI)	t-test statistic	p-value
All	37 (21–52)	5.1456	0.0001567*
Otolaryngology	77 (1–153)	1904	0.04695*
Orthopedics	64 (47–80)	8.0818	1.221e-06*
Urology	14 (-5–34)	1.5777	0.1402
Multispecialty	27 (8–45)	3.1177	0.009061*