The association of foot structure and footwear fit with disability in children and adolescents with Down syndrome

Table 4 Multivariate linear regression analyses with OxAFQ-C Physical domain scores as the dependent variable ^a,b

	OxAFQ-C Physical domain score^c
Independent variables	R²change	pvalue forR²change
Foot structure
Arch Index	0.032	0.212
Hallux valgus (presence)	0.066	0.070
Lesser toe deformity (presence)	0.014	0.409
Footwear fit^d
Length (ill-fitting/lower median)^e	0.013	0.431
Width (ill-fitting/lower median)^e	0.099	0.027

^aAdjusted for sex, age and body mass index.
^bParent-reported Oxford Ankle Foot Questionnaire for Children (OxAFQ-C) domain scores were based on n = 49 due to missing data.
^cAnalyses performed on transformed OxAFQ-C Physical domain scores.
^dLinear regression analyses performed for footwear fit were based on n = 48 due to missing data.
^eIll-fitting: representing the greatest disparity between the participant’s foot and footwear length and width dimensions; expressed as a percentage. The values that defined the lower median (ill-fitting) were as follows: length (shoe 14.3% shorter to 10.8% longer than foot), width (shoe 26.5% to 4.9% narrower than foot).

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