Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Measured and calculated distances at 3 surgery positions in 172 children
| Distances, cm (mean ± SD) | Head-back position (calculated by APLS formula) | Middle head position | Maximal flexion of the head | P-value for HB vs. MH | P-value for MF vs. MH |
|---|---|---|---|---|---|
| CT, cm | 5.43 ± 1.46 | 4.33 ± 1.37 | 3.39 ± 1.35 | < 0.0001 | < 0.0001 |
| CV, cm | 11.3 ± 1.49 | 10.4 ± 1.47 | 9.59 ± 1.47 | < 0.0001 | < 0.0001 |
| TV, cm | 5.90 ± 1.20 | 6.11 ± 1.25 | 6.20 ± 1.26 | < 0.0001 | 0.048 |
