TABLE 4.

Analysis of variance of predicted peak plantar pressure in the forefoot, midfoot, and rearfoot and plantar fascia strain for the four-factor and three-level fractional factorial analysis.

Design factor	Sum of squares for plantar pressure and plantar fascia strain
	Forefoot	Midfoot	Hindfoot	Plantar fascia
Arch support height	9.5 × 10−5 (45.7%)	16.8 × 10−5 (26.7%)	125.5 × 10−5 (47.6%)	7.4 × 10−2 (41.8%)
Medial posting inclination	5.3 × 10−5 (25.5%)	24.1 × 10−5 (38.4%)	7.6 × 10−5 (2.9%)	0.5 × 10−2 (2.7%)
Heel cup height	4.1 × 10−5 (19.7%)	7.3 × 10−5 (11.7%)	99.8 × 10−5 (37.8%)	3.3 × 10−2 (18.5%)
Materials	1.9 × 10−5 (9.1%)	14.5 × 10−5 (23.1%)	30.8 × 10−5 (11.7%)	6.5 × 10−2 (37%)