Table 3.

Student t-test and Levene’s test. HbPREOP = preoperative hemoglobin levels, HbPOSTOP1 = hemoglobin levels on the 1st postoperative day, HbPOSTOP4 = hemoglobin levels on the 4th postoperative day.

Independent Samples Test
		Levene's Test for Equality of Variances		t-test for Equality of Means
		F	Sig.	T	df	Sig. (2-tailed)	Mean Difference	Std. Error Difference	95% Confidence Interval of the Difference
									Lower	Upper
HbPREOP	Equal variances assumed	0.154	0.695	−1.846	108	0.067	−0.7045	0.3817	−1.4599	0.0510
	Equal variances not assumed			−1.893	61.959	0.063	−0.7045	0.3722	−1.4486	0.0396
HbPOSTOP1	Equal variances assumed	0.243	0.623	−4.332	108	0.000	−1.1342	0.2618	−1.6524	−0.6160
	Equal variances not assumed			−4.581	66.079	0.000	−1.1342	0.2476	−1.6285	−0.6399
HbPOSTOP4	Equal variances assumed	1.875	0.173	−1.886	108	0.062	−0.3941	0.2090	−0.8078	0.0196
	Equal variances not assumed			−2.085	72.951	0.041	−0.3941	0.1891	−0.7709	−0.0173
Transfusion	Equal variances assumed	1.394	0.240	4.944	108	0.000	0.497	0.101	0.298	0.697
	Equal variances not assumed			4.826	56.372	0.000	0.497	0.103	0.291	0.704