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Comparison of C2–C7 CSA by levels between the studied groups.
| Level | Cases (n=30) | Control (n=30) | P-value |
|---|---|---|---|
| Mean±SD* | Mean±SD | ||
| Cross-sectional area of C2 (mm2) | 67.7±9.4 | 81.3±4.6 | <0.001 |
| Cross-sectional area of C7 (mm2) | 64.4±9.9 | 81.6±3.8 | <0.001 |
| Average cross-sectional area C2–C7 (mm2) | 68.0±9.1 | 81.9±3.9 | <0.001 |
SD: Standard deviation of the mean. CSA: Cross-sectional area
