Table 1.
Demographic data of the patients
| Parameters | One stage, n = 32 | Two stages, n = 25 | P value |
|---|---|---|---|
| Gender (M/F) | 17/15 | 14/11 | 0.829 |
| Mean age in years (range) | 48.7 ± 13.6 (19–70) | 47.6 ± 13.5 (9–67) | 0.765 |
| Type of work | |||
| Manual (heavy) work | 17 (53.1%) | 11 (44%) | 0.520 |
| Mild to moderate | 5 (15.6%) | 7 (28%) | |
| Housewife | 10 (31.3%) | 7 (28%) | |
| Number of affected vertebrae | |||
| Two vertebrae and one disc | 28 (87.5%) | 22 (88%) | 0.646 |
| Three vertebrae and two discs | 3 (9.4%) | 3 (12%) | |
| Four vertebrae and three discs | 1 (3.1%) | 0 | |
| Preop. Frankel grade | |||
| Grade A | 0 | 0 | 0.165 |
| Grade B | 1(3.1%) | 3 (12%) | |
| Grade C | 8 (25%) | 11 (44%) | |
| Grade D | 8 (25%) | 3 (12%) | |
| Grade E | 15 (46.9%) | 8 (32%) | |
| Preop. degree of pain (VAS) | 8.5 ± 1.3 | 8.5 ± 1.1 | 0.953 |
| Incidence of comorbidities | |||
| None | 17 (53.1%) | 11 (44%) | - |
| Diabetes | 10 (31.2%) | 10 (40%) | |
| Renal impairment | 5 (15.6%) | 4 (16%) | |
| Cardiac affection | 2 (6.3%) | 1 (4%) | |
| Liver affection | 1 (3.1%) | 0 | |
| Respiratory affection | 0 | 1 (4%) | |
| Preop. kyphosis angle | 23.7° ± 4.5° | 21.7° ± 5.2° | 0.075 |