Table 3.
Characteristics of studies included in the systematic review.
| Year | References | Country | Number of cases (n) | Sex ( n ) | Mean age (years) | Type of syphilitic alopecia ( n ) | Pattern of syphilitic alopecia ( n ) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | Female | Symptomatic | Essential | Moth-eaten | Diffuse | Mixed | |||||
| 2014 | Ye et al. (9) | China | 1 | 1 | 0 | 42 | 0 | 1 | 1 | 0 | 0 |
| 2015 | Piraccini et al. (14) | Italy | 5 | 5 | 0 | 38 | 4 | 1 | 4 | 1 | 0 |
| 2016 | Fukui et al. (15) | Japan | 1 | 1 | 0 | 46 | 1 | 0 | 1 | 0 | 0 |
| 2017 | Doche et al. (16) | Brazil | 3 | 3 | 0 | 41 | 2 | 1 | 2 | 1 | 0 |
| 2017 | Tognetti et al. (2) | Italy | 1 | 1 | 0 | 34 | 1 | 0 | 0 | 0 | 1 |
| 2018 | Costa et al. (17) | Italy | 2 | 1 | 1 | 19 | 0 | 2 | 0 | 2 | 0 |
| 2018 | Sebaratnum and Wong (18) | Australia | 1 | 1 | 0 | 35 | 1 | 0 | 1 | 0 | 0 |
| 2019 | Li and Wu (19) | China | 1 | 1 | 0 | 19 | 1 | 0 | 1 | 0 | 0 |
| 2020 | Bomfim et al. (10) | Brazil | 1 | 1 | 0 | 29 | 1 | 0 | 1 | 0 | 0 |
| 2021 | Ciupińska et al. (20) | Poland | 1 | 1 | 0 | 22 | 1 | 0 | 1 | 0 | 0 |
| 2021 | Gomes et al. (21) | Portugal | 1 | 1 | 0 | 20 | 1 | 0 | 1 | 0 | 0 |
| 2021 | Vaccaro et al. (22) | Italy | 1 | 1 | 0 | 39 | 0 | 1 | 1 | 0 | 0 |
| 2021 | Lin et al. (23) | China | 1 | 1 | 0 | 22 | 1 | 0 | 1 | 0 | 0 |
| 2022 | Kosidcanasup and Vejjabhinanta (24) | Thailand | 1 | 1 | 0 | 31 | 0 | 1 | 1 | 0 | 0 |
| 2022 | Present study | Thailand | 20 | 18 | 2 | 30.2 | 17 | 3 | 10 | 4 | 6 |