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Table 3 Discriminant function analysis

From: Predictors of response to prefabricated foot orthoses or rocker-sole footwear in individuals with first metatarsophalangeal joint osteoarthritis

  Orthoses group (n = 47) Rocker-sole footwear group (n = 41)
Wilk’s lambda, chi-square, p λ = 0.77, χ 2 = 10.9, p = 0.012 λ = 0.91, χ 2 = 3.5, p = 0.175
Predictor variable (discriminant function coefficient) Total hours intervention worn during study (0.681) Foot Function Index stiffness (1.00)
Pain severity while walking (0.468) Radiographic severity (0.287)
Foot Function Index difficulty (0.361)  
% of cases correctly classified 73.3 63.2
% of cases correctly classified following validation 62.2 52.6