Table 1 Comparison of three measurement methods
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 |