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Table 3: 
Correlation coefficients indicating the relationship between study variables and clinical prognosisa
P1bΔPcR1dΔRe
Reader 10.434 (.002)0.384 (.007)0.481 (.001)0.394 (.006)
Reader 20.488 (<.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.