Table 3 The pre-operative distributions of cervical alignments in Roussouly type classification
Lordosis | Straight | Sigmoid | Kyphosis | Total | |
|---|---|---|---|---|---|
Roussouly Type I | 10 (34.5%) | 13 (44.8%) | 4 (13.8%) | 2 (6.9%) | 29 |
Roussouly Type II | 6 (28.6%) | 7 (33.3%) | 2 (9.5%) | 6 (28.6%) | 21 |
Roussouly Type III | 25 (43.9%) | 19 (33.3%) | 7 (12.3%) | 6 (10.5%) | 57 |
Roussouly Type IV | 8 (30.8%) | 8 (30.8%) | 3 (11.5%) | 7 (26.9%) | 26 |
Total | 49 (36.8%) | 47 (35.3%) | 16 (12%) | 21 (15.8%) | 133 |