Table 1.

Patient population

Population characteristics	Number	Percent
Total	124,657	100
Age
18–59 years	31,997	26
60–69 years	43,627	35
70–79 years	34,642	28
≥ 80 years	14,391	12
Sex
Male	49,559	40
Female	75,098	60
Body mass index
≤ 24.9 kg/m2	18,433	15
25.0–29.9 kg/m2	38,142	31
30.0–34.9 kg/m2	33,445	27
≥ 35.0 kg/m2	34,637	28
Functional status
Independent	121,696	98
Dependent	2961	2
Diabetes	17,484	14
Dyspnea on exertion	8304	7
Hypertension	78,851	63
COPD	4688	4
Current smoker	67,712	10
Procedure
THA	48,076	36
TKA	76,581	61
Anesthesia
Regional	56,658	46
General	67,712	54

COPD = chronic obstructive pulmonary disease.