Table 1.

Scabies diagnostic criteria used in study

1. Reference Standard: 2020 IACS criteria (clinical categories used in study)

Subcategory B3: Typical lesions in a typical distribution and two history features

Subcategory C1: Typical lesions in a typical distribution and one history features

Subcategory C2: Atypical lesions or atypical distribution and two history features

*History features: itch; positive contact history

2. Index Tests

A. Simplified criteria  Typical lesions in a typical distribution, with or without itch

B. Alternative simplified criteria 1 (ASC1)  At least one of:  i. Typical lesions in a typical distribution, with or without itch  ii. Atypical lesions in a typical distribution, with itch

C. Alternative simplified criteria 2 (ASC2)  At least one of:  i. Typical lesions in a typical distribution, with or without itch  ii. Atypical lesions in a typical distribution, with or without itch

D. Alternative simplified criteria 3 (ASC3)  Itch

E. Alternative simplified criteria 4 (ASC4)  Itch and positive contact history