Table 4. Fusion rates at postoperative 6, 12, and 24 months for ALIF and LLIF.

	ALIF % solid fusion (n fused/n total)	LLIF % solid fusion (n fused/n total)	Significance (p value)
6 mo	66 (33/50)	45 (18/40)	0.0559
12 mo	96 (48/50)	85 (34/40)	0.1356
24 mo	100 (50/50)	95 (38/40)	0.1948

Abbreviations: ALIF, anterior lumbar interbody fusion; LLIF, lateral lumbar interbody fusion.