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Table 1 Absolute and Relative Technical Error of Measurement (TEM) for adult self-measurement, parental measurement, and researcher measurement of head circumference

From: Reliability of self, parental, and researcher measurements of head circumference

  Adult self-measurement Parent measurement of child
  Absolute TEM Relative TEM Absolute TEM Relative TEM
Within -rater     
Adult self/parental 0.52 0.91% 0.29 0.57%
Researcher A 0.26 0.45% 0.16 0.31%
Researcher B 0.31 0.53% -- --
Between- rater     
Self/child vs. researcher A 0.82 1.43% 0.20 0.39%
Both researchers 0.45 0.78% -- --
  1. Secondly, between-researcher TEM and ICC were also good for the adult sample (n = 47), with the TEM for the difference between researcher mean measurements falling within the acceptable limits for a skilled anthropometrist and the ICC = 0.93 (95% CI: 0.88–0.96).