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. Author manuscript; available in PMC: 2014 May 2.
Published in final edited form as: J Urol. 2012 Oct 24;188(6):2323–2327. doi: 10.1016/j.juro.2012.08.031

Table 1.

Differences in case mix across ambulatory care settings.

Patient Characteristic Ambulatory Care Setting
P-Value
HOPD (n=33,802) ASC (16,798) PO (233,971)

Patient age, in years (SD) 75.4 (6.8) 74.9 (6.5) 75.4 (6.7) <0.001

Female, % 38.2 31.5 33.8 <0.001

Race, % <0.001
 White 89.6 91.0 90.2
 Black 7.7 7.2 5.6
 Other 2.7 1.8 4.2

Charlson, % <0.001
 0 59.1 82.6 62.9
 1 23.1 9.4 22.3
 2 9.9 4.6 8.7
 ≥3 7.9 3.4 6.1

Area of residence, % <0.001
 Northeast 19.7 11.4 20.4
 Midwest 37.8 17.0 24.4
 South 34.2 59.1 38.5
 West 8.3 12.5 16.7

Abbreviations: ASC, ambulatory surgery center; HOPD, hospital outpatient department; PO, physician office; SD, standard deviation.