Completeness, consistency, and duplicity of self-mutilation reports by adolescents in the Notifiable Diseases Information System: evaluation study, Santa Catarina, 2014-2023

Abstract Objective To evaluate the completeness, consistency, and duplicity of self-mutilation reports among adolescents in Santa Catarina, from 2014 to 2023. Methods This study evaluated reports recorded in the Notifiable Diseases Information System (Sistema de Informação de Agravo de Notificação - SINAN). Completeness was assessed for 18 variables and classified as excellent (≥95.0%), good (90.0%–95.0%), fair (70.0%–90.0%), poor (50.0%–70.0%), and very poor (<50.0%). The consistency of seven variables was analyzed and classified into three categories: excellent (≥90.0%), fair (70.0%–89.0%), and low (<70.0%). Duplicity was checked using the variable “NDUPLIC_N” and by manual verification. Temporal trends were analyzed using Prais–Winsten regression, which classified them as stable, increasing, or decreasing. Results A total of 1,403 self-mutilation reports were identified. Completeness was excellent for 12 variables and good for three. Sexual orientation (75.8%) and gender identity (76.2%) were rated fair, while motivation of violence (46.1%) was rated very poor. An increasing trend in completeness was observed for three variables. Consistency was excellent for six variables and fair for one, with an increasing trend in “sex of the person attended versus sex of the perpetrator,” a decreasing trend in “presence of disability or disorder vs. type,” and stability for the others. No duplicate records were found. Conclusion The analyzed data showed good quality in the recording of self-mutilation among adolescents in SINAN of Santa Catarina. Strategies such as continuing education for health professionals and revisions to the reporting form are crucial for enhancing data quality and strengthening the planning of interventions to address this form of violence.