Table 2 Comparison of two groups

No. of patients

26

19

–

Age (years)

70.9 ± 8.1

72.1 ± 8.5

0.679

Sex (M, F)

18: 8

11: 8

0.438

No. of fusion segments

1.6 ± 0.8

1.4 ± 0.7

0.412

One-level

14

13

Two-levels

10

4

Three-levels

1

2

Four-levels

1

0

No. of fusion spine levels

41

27

0.083

L1–2 No. of fusion spine levels

2

1

L2–3 No. of fusion spine levels

7

2

L3–4 No. of fusion spine levels

15

7

L4–5 No. of fusion spine levels

17

17

Blood loss (ml)

65.3 ± 70.2

42.2 ± 40.5

0.144

Pre-ope Hb (g/dl)

13.6 ± 1.8

14.0 ± 1.1

0.441

First-post-ope Hb (g/dl)

11.7 ± 2.0

12.1 ± 1.7

0.414

Change in Hb preope to first post ope (g/dl)

−1.9 ± 1.0

−1.9 ± 1.1

0.982

Time in operating room (min)

129.7 + 36.0

98.4 + 41.3

< 0.01

Length of stay (days)

16.6 + 4.4

16.2 + 4.6

0.835