Table 1.
Summarized baseline demographic data and surgical data of all analyzed LLIF cases.
|
Items |
6° Cage (n = 32) |
10° Cage (n = 13) |
12° Cage (n = 20) |
Pa |
| 1. Sex, F:M | 14:18 | 6:7 | 9:11 | .988 |
| 2. Age, mean ± SD (range), y | 65.5 ± 8.5 (49–81) | 67.5 ± 12.0 (39–88) | 64.8 ± 11.2 (44–79) | .735 |
| 3. Operation time, mean ± SD (range), min | 245.0 ± 109.7 (86–499) | 323.9 ± 147.7 (140–494) | 202.3 ± 81.8 (73–360) | .012b |
| 4. EBL, mean ± SD (range), mL | 89.1 ± 100.3 (10–450) | 173.5 ± 180.4 (30–600) | 83.8 ± 75.0 (5–300) | .117 |
| 5. LOS, mean ± SD (range), h | 85.6 ± 54.2 (24–216) | 178.8 ± 204.2 (48–812) | 104.7 ± 63.2 (23–216) | .164 |
| 6. Preoperative diagnosis, n (% of patients) | P | |||
| Spondylolisthesis | 15 (45.5) | 5 (38.5) | 9 (45) | .991 |
| Scoliosis | 8 (24.2) | 5 (38.5) | 6 (30) | |
| DDD, foraminal stenosis | 6 (18.2) | 2 (15.4) | 3 (15) | |
| Revision surgeryc | 3 (9.1) | 1 (7.7) | 2 (6.7) | |
| 7. Levels treated, n (of levels) (% of patients) | Pa | |||
| T12–L1 | 0 | 3 (10.0) (23.1) | 0 | .007b |
| L1–2 | 0 | 5 (16.7) (38.5) | 0 | .000b |
| L2–3 | 11 (21.2) (33.3) | 7 (23.3) (53.8) | 9 (27.3) (45.0) | .423 |
| L3–4 | 24 (46.2) (72.7) | 6 (20.0) (46.2) | 11 (33.3) (55.0) | .128 |
| L4–5 | 17 (32.7) (51.5) | 9 (30.0) (69.2) | 13 (39.4) (65.0) | .602 |
| 8. Levels treated per case, n (% of patient) | P | |||
| 1 | 14 (42.4) | 4 (30.8) | 10 (50.0) | .008b |
| 2 | 15 (45.5) | 2 (15.4) | 6 (30.0) | |
| 3 | 3 (9.1) | 2 (15.4) | 4 (20.0) | |
| 4 | 0 | 4 (30.8) | 0 | |
| 5 | 0 | 1 (7.7) | 0 |
Abbreviations: DDD, degenerative disc disease; EBL, estimated blood loss; F, female; LLIF, lateral lumbar interbody fusion; LOS, length of stay; M, male; N, number.
a
P values obtained from testing overall difference in the groups (items 1–5 and 7 are different because the rows are not mutually exclusive; therefore, each variable/subvariable will have its own P value).
b
Statistical significance at P < .05.
c
Revision surgery includes those with pseudoarthrosis, failed decompression, cage migration from prior interbody fusion, and adjacent level disease.