Table 1.

Patient and surgical characteristics and outcomes of the two groups

Characteristic	Group A (n = 52)	Group B (n = 57)
Sex (male)	30 (57.7 %)	36 (63.2 %)
Age at initial operation (years)	49.9 ± 15.9 (20–71)	50.5 ± 16.1 (21–73)
Operation time (min)	215.5 ± 35.0 (146–276)	222.6 ± 39 (157–279)
Intraoperative bleeding (ml)	520.1 ± 59 (250–1000)	522.3 ± 54 (253–1000)
Time to abscess disappearance (postoperative months)*	7.4 ± 0.7 (6–12)	5.4 ± 0.6 (5–10)
Time to bone fusion (postoperative months)*	8.9 ± 0.6 (6–12)	6.4 ± 0.5 (5–10)

Data are presented as n (%) or mean ± standard deviation (range)

^* P < 0.05