Table 2 Comparison between study groups regarding directly-estimated IBL, need for blood transfusion, postoperative hemoglobin and hematocrit drop and calculated blood loss

Estimated IBL (mL) (95% CI) Mean ± SD (95% CI)

389.7 ± 98.56 (349.0–430.4)

485.04 ± 230.6 (387.6–582.4)

0.07^a

Need for blood transfusion

0 (0%)

1 (4.16%)

0.48^b

Hemoglobin concentration (gm/dL)

0.68^c

 Preoperative

12.34 ± 0.97

12.63 ± 1.22

 Postoperative

10.68 ± 1.02

10.13 ± 1.81

 Mean Paired

− 1.65 ± 0.71

− 2.50 ± 1.84

 Difference (95% CI)

(− 1.95 to − 1.36)

(− 3.28 to − 1.72)

Hematocrit (%)

0.72^c

 Preoperative

37.35 ± 3.01

38.25 ± 3.80

 Postoperative

29.92 ± 2.88

28.37 ± 5.07

 Mean Paired

− 7.43 ± 2.12

− 9.87 ± 5.28

 Difference (95% CI)

(− 8.31 to − 6.55)

(− 12.10 to − 7.64)

Calculated IBL (mL) Mean ± SD (95% CI)

311.78 ± 78.85 (279.2–344.3)

388.03 ± 184.55 (310.1–465.9)

0.07^d