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. 2021 Feb 23;63:102176. doi: 10.1016/j.amsu.2021.02.022

Table 2.

Augmented Dickey Fuller stationarity test.

Ambulatory Surgery Center Type Dickey-Fuller Test Statistic p-value
All −4.0292 0.01619*
Otolaryngology −2.9854 0.1806
Orthopedics −3.701 0.03456*
Urology −2.8007 0.2544
Multispecialty −2.2533 0.473