Factors influencing coexistence of toenail onychomycosis with tinea pedis and other dermatomycoses: a survey of 2761 patients.

Objective: To evaluate the prevalence and factors influencing the presence of concomitant dermatomycoses in patients with toenail onychomycosis.

Design: Prospective study based on a specially designed questionnaire completed by dermatologists.

Patients: A total of 2761 patients with toenail onychomycosis.