Table 2.
Comparison of groups A and B.
| Variable | Group A (n = 4) | Group B (n = 6) | P-value |
|---|---|---|---|
| Age (years) | 73 (64–78) | 75.1 (67–79) | 0.7491 |
| Sex (male/female) | 4/0 | 5/1 | 1 |
| No. of PLIF segments | 1 | 1.33 | 0.3938 |
| 1 | 4 | 4 | |
| 2 | 0 | 2 | |
| DM (−/+) | 2/2 | 3/3 | 1 |
| Operation time (min) | 183.5 (130–217) | 209.5 (117–420) | >0.9999 |
| Blood loss | 587.5 (50–1600) | 516.6 (150–1600) | >0.9999 |
| ETD | 46.5 (33–61) | 17.7 (12–29) | 0.0105 |
| Clinical findings (−/+) | 4/0 | 1/5 | 0.0476 |
| CRP | 0.343 (0.22–0.58) | 2.852 (0.15–7.21) | 0.0881 |
| Healing time (day) | 49 (20–86) | 112 (14–253) | 0.3938 |
Clinical findings, heat, redness, swelling, and discharge from the wound; CRP, minimum value of C-reactive protein on hematological examination at >1 week after posterior lumbar interbody fusion; Healing time, the period to achieve negative CRP laboratory test results after the first operation for infection; PLIF, posterior lumbar interbody fusion; ETD, elapsed time to diagnosis; DM diabetes mellitus.
Data analysis: Mann–Whitney U test.