Table 3 Univariate analysis of correlation between clinical factors and loss of subaxial lordosis
From: Subaxial lordosis loss and influence factors after posterior atlantoaxial fusion
Loss of subaxial lordosis (n = 5) | Increase in subaxial lordosis (n = 13) | χ2 | P | |
|---|---|---|---|---|
Gender | 0.678 | 0.410 | ||
Male | 3 | 5 | ||
Female | 2 | 8 | ||
Age (years old) | 0.209 | 0.648 | ||
< 60 | 4 | 9 | ||
≥ 60 | 1 | 4 | ||
Preoperative T1S | 0.004 | 0.952 | ||
< 25° | 3 | 8 | ||
≥ 25° | 2 | 5 | ||
Preoperative C2–C7 SVA | 3.545 | 0.060 | ||
< 15 mm | 4 | 9 | ||
≥ 15 mm | 1 | 4 | ||
Preoperative TIA | 0.138 | 0.710 | ||
< 70° | 2 | 4 | ||
≥ 70° | 3 | 9 | ||
Preoperative C2–C7 angle | 4.923 | 0.026 | ||
< 20° | 1 | 10 | ||
≥ 20° | 4 | 3 | ||
Preoperative C0–C2 angle | 0.780 | 0.377 | ||
< 20° | 2 | 7 | ||
≥ 20° | 3 | 6 | ||
Preoperative C0–C7 angle | 1.298 | 0.255 | ||
< 45° | 2 | 9 | ||
≥ 45° | 3 | 4 | ||
Postoperative C1–C2 angle | 2.215 | 0.137 | ||
< 20° | 2 | 10 | ||
≥ 20° | 3 | 3 |