Table 1 Measurements of the OC4D and OCD in neutral, flexion, and extension positions
From: A novel method for measurement of the occipital-cervical distance via the occiput-C4 distance
Neutral (n = 150) | Flexion (n = 150) | Extension (n = 150) | Group difference (P value) | |
|---|---|---|---|---|
OC4D (mm) | 69.0 ± 6.9 | 68.9 ± 6.8 | 68.1 ± 6.9 | 0.302 |
OCD (mm) | 23.0 ± 4.8 | 27.6 ± 6.0 | 13.8 ± 4.7 | F > N > E (P < 0.05) |