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Table 6 Between-session, intra-observer standard error of measurement (SEM) and 95% confidence level (SEM × 2).

From: Reliability of two goniometric methods of measuring active inversion and eversion range of motion at the ankle

   Sitting Prone
Observer   Inversion Eversion Inversion Eversion
A SEM 3.5 5.2 3.8 2.3
  SEM × 2 7 10 8 5
B SEM 5.4 5.3 3.3 2.3
  SEM × 2 11 11 7 5
C SEM 4.2 5.0 2.9 2.1
  SEM × 2 8 10 6 4