Table 4

FPI total scores versus age year groups, showing normal range and FPI outside normal range

Age (years)−2 SD−1 SDMean+1 SD+2 SDSample sizeSDFPI median (±1 SD)FPI median (±2 SD)Clinical alert
FPI >±2 SD
30.023.607.1910.7812.78213.68 (4–12)8 (0–12)<0 or >12
41.113.766.409.0411.79202.66 (3–9)6 (0–12)<0 or >12
5−2.410.914.227.5410.68553.33 (0–6)3 (−3 to 9)< −3 or >9
6−1.371.504.367.2210.713882.94 (1–7)4 (−2 to 10)< −2 or >10
7−1.531.404.327.2410.675362.94 (1–7)4 (−2 to 10)< −2 or >10
8−1.641.334.297.2510.154732.94 (1–7)4 (−1 to 10)< −1 or >10
9−1.741.113.966.819.836252.84 (1–7)4 (−1 to 10)< −1 or >10
10−2.310.733.776.819.924973.03 (0–6)4 (−3 to 9)< −3 or >9
11−1.771.284.337.3810.203773.04 (1–7)4 (−2 to 10)< −2 or >10
12−2.430.924.267.6110.731443.34 (1–7)4 (−2 to 10)< −2 or >10
13−0.032.715.458.1911.18332.75 (2–8)5 (−1 to 11)< −1 or >11
14−3.89−0.283.326.929.92223.64 (1–7)4 (2 to 9)< −2 or >9
15−2.840.774.387.9911.18263.64 (0–8)4 (−4 to 12)<−4 or >12
  • FPI, foot posture index.