Table 3. Operative details.

	n	%
Number of intervertebral levels
1	143	63
2	67	29.5
3	14	6.2
4	3	1.3
Total number of cases	227
Operative level
L2–L3	3	0.9
L3–L4	16	4.8
L4–L5	115	34.7
L5–S1	197	59.5
Total number of levels exposed	331
Operation performed
ALIF	308	93.1
Total disk replacement	23	6.9

Abbreviation: ALIF, anterior lumbar interbody fusion.