Table 1.

Patient demographics

Characteristic	Bair Hugger (n = 60) Mean ± Standard Deviation n = frequency, % = percentage		Hot Dog (n = 60) Mean ± Standard Deviation n = frequency, % = percentage
Age (years)	60.2 ± 11.4		63.9 ± 12.7
Weight (kg)	84.5 ± 25.8		79.5 ± 18.7
Body Mass Index	29.5 ± 7.8		28.2 ± 6.0
Operation (hip, knee)	n = 32(53%), n = 28(47%)		n = 32(53%), n = 28(47%)
Anesthesia (spinal, general)	n = 26(43.33%), n = 34(56.67%)		n = 36(60%), n = 24(40%)
OR Time (“wheels in to wheels out”) (minutes)	171.97 ± 50.72		147.07 ± 32.70
aCut to Close Time	113.7 ± 45.70		87.98 ± 29.04
bEstimated Blood Loss (milliliters)	294 ± 253		244 ± 236
American Society of Anesthesiology Score (ASA Class)	Class	n = frequency (% = percentage)	Class	n = frequency (% = percentage)
	1	n = 3 (5%)	1	n = 1(1.67%)
	2	n = 24(40%)	2	n = 19(31.67%)
	3	n = 30(50%)	3	n = 38(63.33%)
	4	n = 3(5%)	4	n = 2(3.33%)

^a“Close time” defined as the time at which the dressing has been fully applied

^bEstimated blood loss is a visual estimate of blood loss based on the saturation of dry sponges and the volume (ml) collected in the suction canister(s) at the end of the surgery, after the incision is closed and the dressing is fully applied