Table 2.

Mean pre-operative and post-operative hemoglobin and hematocrit by gender

Gender			N	Mean	SD	Mean diff
Male	Hemoglobin	Pre	36	15.11	1.2	3.7
		Post	36	11.44	2.3
	Hematocrit	Pre	36	44.26	3.7	10.2
		Post	36	34.01	6.5
Female	Hemoglobin	Pre	56	12.39	1.7	3.0
		Post	56	9.39	1.7
	Hematocrit	Pre	56	37.20	4.2	8.9
		Post	56	28.30	4.6