Table 1.
Comparisons of demographic data between groups
| Group | Significance test | ||
|---|---|---|---|
| DBM | AIBG | ||
| (n = 26) | (n = 21) | (p-value) | |
| Age (years) | 67.19 ± 9.42 | 65.10 ± 6.66 | 0.39 |
| Gender (n, male/female) | 6:20 | 5:16 | 1.00 |
| TLIF/PLIF (n) | 12 | 8 | 0.58 |
| Operative levels (n) | 13 three-level | 11 three-level | 0.58 |
| 11 four-level | 9 four-level | ||
| 1 five-level | 1 six-level | ||
| 1 seven-level | |||
The continue data were compared with independent t test while the categorical data were compared with Chi-square test or Fisher’s exact test
DBM demineralized bone matrix, AIBG autogenous iliac bone graft, TLIF transforaminal lumbar interbody fusion, PLIF posterior lumbar interbody fusion