Table 1 Demographic date

N

40

40

40

Age (year)

57.4 ± 10.7

58 ± 12.3

53.1 ± 12

P > 0.05

 Males

13

18

19

P > 0.05

 Females

27

22

21

P > 0.05

BMI (kg/cm²)

24.9 ± 3.9

25 ± 3.3

25.6 ± 2.8

P > 0.05

Preoperative HGB (g/l)

126.8 ± 8.6

123.4 ± 10.3

139.4 ± 13.6

P > 0.05

Surgical level

2.31 ± 0.09

2.76 ± 0.12

2.40 ± 0.10

P > 0.05

Operative time (min)

144.5 ± 40.2

128 ± 40.9

121 ± 19.1

P > 0.05

Intra-operative blood loss (ml)

190 ± 123.2

223.8 ± 163

176 ± 100.5

P > 0.05

Mean duration of hospital stay (days)

7.82 ± 1.2

6.09 ± 1.3

6.13 ± 1.3

P = 0.001

Number of transfusion

12

3

3

P = 0.001