Table 3.
Brantigan and Steffee spinal fusion grades at 3 and 12 months after surgery.
| Follow-up | Group | BD(n = 71) | BO(n = 56) | H | P | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade | A | B | C | D | E | A | B | C | D | E | |||
| 3 months | L3/4(n = 6/2) | 0 | 2 | 4 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 5.549 | 0.018 |
| L4/5(n = 41/35) | 0 | 6 | 25 | 9 | 0 | 0 | 0 | 20 | 15 | 0 | |||
| L5/S1(n = 25/19) | 0 | 2 | 17 | 6 | 0 | 0 | 2 | 13 | 4 | 0 | |||
| total | 0 | 10 | 46 | 15 | 0 | 0 | 2 | 34 | 20 | 0 | |||
| 12 months | L3/4(n = 6/2) | 0 | 0 | 1 | 3 | 1 | 0 | 0 | 1 | 1 | 0 | 3.285 | 0.070 |
| L4/5(n = 41/35) | 0 | 0 | 4 | 25 | 12 | 0 | 0 | 1 | 11 | 21 | |||
| L5/S1(n = 25/19) | 0 | 0 | 2 | 14 | 9 | 0 | 0 | 1 | 8 | 10 | |||
| total | 0 | 0 | 7 | 42 | 22 | 0 | 0 | 3 | 19 | 21 | |||
Kruskal–Wallis H test: Comparing the fusion levels between groups. H: Test statistic, P: Significance probability value, with P ≤ 0.05 indicating that the difference is statistically significant.