Table 6.
Crosstabulation confounding factors versus MacNab outcomes
| Confounding factor | MacNab outcomes |
||||
|---|---|---|---|---|---|
| Excellent | Good | Fair | Poor | Total | |
| Multilevel stenosis, scoliosis | 3 | 1 | 0 | 0 | 4 |
| Patients without confounding factors | 17 | 5 | 0 | 0 | 22 |
| Adjacent segment | 1 | 1 | 0 | 0 | 2 |
| Adjacent segment disease, scoliosis | 1 | 0 | 0 | 0 | 1 |
| Multilevel stenosis | 3 | 4 | 2 | 1 | 10 |
| Multilevel stenosis, osteoporosis | 0 | 0 | 0 | 1 | 1 |
| Postlaminectomy syndrome | 0 | 0 | 2 | 0 | 2 |
| Postlaminectomy syndrome, adjacent level disease | 1 | 1 | 0 | 0 | 2 |
| Postlaminectomy syndrome, multilevel stenosis | 2 | 1 | 0 | 0 | 3 |
| Postoperative adjacent segment disease | 1 | 0 | 0 | 0 | 1 |
| Total | 29 | 13 | 4 | 2 | 48 |
Pearson chi-square: 57.278804; asymptotic significance (2-sided)=0.001. Likelihood ratio: 32.738249; asymptotic significance (2-sided)=0.206.