Table 2. Stage 1 Scoring system for pre-selection of cases for investigation.
| Clinical feature | Category | % within category | Score* |
| Age group (years) | 21–40 | 64.4 | 3 |
| Other ages | 35.6 | 2 | |
| Sex | Male | 79 | 4 |
| Female | 21 | 1 | |
| Occupation | Outdoor activities | 70.8 | 3 |
| Other | 29.2 | 2 | |
| Region | North or south | 95.0 | 4 |
| Other | 5.0 | 1 | |
| Onset typical# | Yes | 96.4 | 4 |
| No | 3.6 | 1 | |
| Number of lesions | Single | 73.9 | 4 |
| Multiple | 26.1 | 1 | |
| Type of lesion | A typical stage | 91.0 | 4 |
| An atypical stage | 9.0 | 1 | |
| Site of lesion | An exposed area | 89.7 | 4 |
| Other | 10.3 | 1 | |
| Size of lesion (maximum) diameter | |||
| Up to 2 cm | 68.7 | 3 | |
| Above 2 cm | 31.3 | 2 | |
| Duration (months) | Within 8 months | 79.3 | 4 |
| Above 8 months | 20.7 | 1 |
# Painless acne-form non-itchy lesions of < 2 mm size, *If percentage within category in each clinical variable was over 75% patients or lesions, score of 4 was given, if 50–74% = 3, 25–49% = 2 and less than 25% = 1 was given.