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. 2019 Apr 14;9(4):e023341. doi: 10.1136/bmjopen-2018-023341

Table 1.

Descriptive statistics for the amalgamated datasets

Variable N Range Minimum Maximum Mean SD
Age (years) 3217 12 3 15 8.67 2.02
BMI (kg/m2) 3217 28.57 10.57 39.14 19.08 4.05
FPI right 3217 16 −4 12 4.20 3.00
FPI left 3217 16 −4 12 4.11 2.92

Due to variation between the constituent datasets, main results emerged from the variables of age, BMI and FPI left. Gender ratio was 1699 males:1518 females.

BMI, body mass index; PFPI, foot posture index.