Table 2.

Radiographic data of bone graft growth pattern

	a	b	c	P ab		P ac	P bc
Percent of patients	20% (104/520)	75% (390/520)	5% (26/520)	< 0.001	< 0.001		< 0.001
Males/females (n)	45/59	211/179	15/11	< 0.001	< 0.001		< 0.001
Mean age	51.85 ± 10.30	56.67 ± 9.06	58.40 ± 8.22	0.7467	0.3389		0.1248
Hospitalization duration (days)	9.25 ± 2.05	8.76 ± 1.99	9.00 ± 2.70	0.1705	0.6479		0.1019
Operative duration (min)	95.25 ± 17.66	99.73 ± 13.10	91.5 ± 15.47	0.5716	0.7616		0.2944
Surgical haemorrhage (ml)	82.75 ± 12.43	93.40 ± 13.86	90.0 ± 20.28	0.0857	0.3105		0.7017
Drainage (ml)	17.00 ± 6.77	17.58 ± 6.17	18.00 ± 7.15	0.9599	0.9515		0.9236
Fusion rate	99%	98%	97%	0.9687	0.9268		0.9715
Subsidence rate	2%	5%	10%	0.0015	< 0.001		< 0.001
Segmental angle (°)	6.16 ± 3.67	7.06 ± 5.67	12.36 ± 6.78	0.4914	< 0.001		< 0.001
C2–C7 Cobb angle (°)	1.57 ± 20.55	5.66 ± 18.05	7.87 ± 13.55	0.023	< 0.001		< 0.001