TABLE A1.

Logistic Regression Results for the Relationship Between Patient Parameters and Lesion Characteristics on the Incidence of Coexisting OCLs^a

	Original Model		Reduced Model
	Model = glm(coexist ∼ age + sex + talar grade + talar lateral zone + talar size + talar containment)		Model = glm(coexist ∼ age + talar lateral zone)
Parameter	Coefficient	P	Coefficient	P
Age	0.043	.039	0.050	.012
Sex	0.199	.734
Talar grade	0.548	.210
Talar lateral zone	1.699	.015	1.512	.009
Talar lesion size	0.011	.062
Talar containment	–0.849	.228

^aOriginal model (left), with all parameters included, was evaluated first, which revealed 2 statistically significant parameters: age and talar osteochondral lesions (OCLs) located in lateral zones. The model was reduced to these 2 parameters (right), where age and talar OCLs located in lateral zones were significant. An analysis of variance was performed to confirm that reducing the model to include only age and talar lateral zone accepts the null hypothesis that the other parameter coefficients from the original model are equal to zero. All statistical analyses were performed with R, and P < .05 is considered statistically significant (in bold).