P-values of comparisons | |||||||
---|---|---|---|---|---|---|---|
Collar type | Mean° | Range° | Without | Stifneck | Miami J | Philadelphia | Vista |
Without | 53 ± 9 | 45 - 65 | |||||
Stifneck | 18 ± 7 | 12 - 29 | < 0.001 | ||||
Miami J | 21 ± 10 | 13 - 38 | < 0.001 | 0.06 | |||
Philadelphia | 22 ± 8 | 15 - 32 | < 0.001 | 0.01 | 0.98 | ||
Vista | 25 ± 9 | 16 - 39 | < 0.001 | < 0.001 | 0.004 | 0.027 | - |