Correlation coefficients indicating the relationship between study variables and clinical prognosisa
| P1b | ΔPc | R1d | ΔRe | |
|---|---|---|---|---|
| Reader 1 | 0.434 (.002) | 0.384 (.007) | 0.481 (.001) | 0.394 (.006) |
| Reader 2 | 0.488 (<.001) | 0.380 (.008) | 0.509 (<.001) | 0.366 (.011) |
↵a Numbers in parentheses are P values. P values <.01 were considered statistically significant.
↵b P1 is the initial maximal thickness of the sternocleidomastoid muscle.
↵c ΔP is the difference in the maximal thickness of the SCM between initial and follow-up measurements.
↵d R1 is the initial SCM thickness ratio (maximal thickness of the involved muscle/maximal thickness of the normal muscle).
↵e ΔR is the difference in the SCM thickness ratio between initial and follow-up measurements.