Table 5: Nail pathology, structural deformities,

and hyperkeratosis.

Finding

Patients

n (%)

Nail pathology

Onychocryptosis (ingrown nail)

201 (66.6)

Onychogryphosis/pachyonychia

(thickened nail)

101 (33.4)

Xanthonychia (yellow nail discoloration)

100 (33.1)

Pincer nail

48 (15.9)

Melanonychia (black nail)

30 (9.9)

Anonychia (absent nail)

4 (1.3)

Digital deformities

Claw toe deformity

97 (32.1)

Hallux valgus

123 (40.7)

Crossed toes

13 (4.3)

Hyperkeratosis (callus formation) by region

Dorsal

255 (84.4)

Plantar (beneath metatarsal heads)

133 (44.0)

Digital tip

63 (20.9)

Interdigital

40 (13.2)

Any region

273 (90.4)

All findings reported at the patient level (n = 302). A patient was classified as positive for any finding if present in at least one toe of either foot. Hyperkeratosis assessed by region: dorsal (dorsum of toes), plantar (beneath metatarsal heads), digital tip, and interdigital spaces.