Table 2.

Comparison of two groups

Characteristic	DP group	SP group	p-value
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

All values are in mean ± standard deviation

DP dual position, SP single position