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Table 1 Comparison of three measurement methods

From: Comparative study on three different methods for arm-span measurement: the Japan environment and Children’s study pilot

   A (No-Wall) B (Wall & No-Line) C (Wall & Line) P value*
Difference between 1st and 2nd measurements (cm) Median (95% CI) 1.0 (0.4–1.1) 0.4 (0.2–0.7) 0.2 (0.1–0.5) 0.062
The mean of the two measurement times (s)a Median (95% CI) 19.1 (15.9–31.2) 19.0 (15.1–24.7) 18.0 (13.4–27.6) 0.368
  1. N = 9
  2. CI confidence interval
  3. aThe time for which a child maintains a posture
  4. *Friedman test