Table 1 Baseline characteristics

Age (years)^a

66.73 ± 7.22

66.63 ± 9.20

Gender (Female/Male)^b

112/43

117/41

Height (cm)^a

162.12 ± 10.29

164.16 ± 10.09

Weight (kg)^a

65.64 ± 7.22

66.73 ± 7.22

BMI^a

24.95 ± 3.44

24.78 ± 3.13

Preoperative Hemoglobin (Hb, g/L)^a

11.73 ± 1.95

11.42 ± 1.67

ASA Classification (II/III)^b

51/104

54/104

Hypertension [Yes/No (%)]^b

111/44 (71.6%)

118/40 (74.1%)

Diabetes [Yes/No (%)]^b

117/38 (75.5%)

114/44 (72.2%)

Coronary Artery Disease [Yes/No (%)]^b

32/123 (20.6%)

27/131 (17.1%)

Chronic Obstructive Pulmonary Disease (COPD) [Yes/No (%)]^b

28/127 (18.1%)

35/123 (22.2%)