Table 5.
The changes number of patients preoperation and at final follow-up according to Roussouly classification (n = 160).
| Preoperation | Final follow-up | χ 2 | P | |
|---|---|---|---|---|
| Roussouly classification | Number of case (n, %) | Number of case (n, %) | 135.818 | <0.001 |
| Roussouly type I | 39 (24.4%) | 17 (10.6%) | ||
| Roussouly type II | 89 (55.6%) | 44 (27.5%) | ||
| Roussouly type III | 17 (10.6%) | 87 (54.4%) | ||
| Roussouly type IV | 15 (9.4%) | 12 (7.5%) | ||
| Types | 15.960 | <0.001 | ||
| Standard group | 17 (10.6%) | 87 (54.4%) | ||
| Nonstandard group | 143 (89.4%) | 73 (45.6%) |
The Roussouly type III is defined as standard, the other three types (Roussouly type II, Roussouly type III, and Roussouly type IV) are defined as nonstandard.