Mapping of Indonesians' Skin Type Based on Baumann Skin Type Indicator-Indonesia (BSTI-Ina) Questionnaire and Development of Artificial Intelligence Modelling BSTI-Ina: A Multicentric Study

This research is an observational study with a cross-sectional design. The aims of this study is to determine the validity and reliability of BSTI questionnaire translated in Indonesian and to develop artificial intelligence modelling for BSTI-Ina based on photographs. This study will be held in 13 research centers with a total of 1950 subjects consists of males and females age 18-59. It conducts of 2 phases. Phase 1 is to determine which version of BSTI will be used based on which one is more valid and reliable being translated in Indonesian and will be conducted in Jakarta as a pilot. In phase 1, participants will be asked to fill both BSTI-Ina 2006 and 2002 questionnaire. Participants then will be photographed in five different positions. Data will be analyzed to determine which of BSTI-Ina version is more valid and reliable. After deciding which BSTI-Ina version will be used, the study then goes to phase 2. Phase 2 will be conducted in 12 other research centers in Indonesia to map Indonesian population skin type. In both 2 phases, all participants will be asked to fill in BSTI-Ina questionnaire (either 2006 or 2022 version based on the result of Phase 1). Participants then will be photographed in five different positions. After all the data from all research centers are collected, data will be analyzed to map Indonesian population's skin type. Data as participants' skin types and photographs will also be processed by machine to model artificial intelligence. The aim is to automatically categorize skin type based on BSTI-Ina based on photographs.