Effect of six- versus eight-month regimen on treatment success and smear conversion among retreatment patients

We abstracted data from the TB unit register between November 2021 and February 2022 for all patients with retreatment PBC-TB with known rifampicin resistance status for the period January 2012 to December 2021. We used a standardized data abstraction tool in KoBo ToolBox, a web-based and smartphone data collection tool. KoBo ToolBox was integrated with quality control measures such as skip patterns, alerts, range, and legal values to ensure accuracy in data entry. The data were collected by trained and supervised research assistants, one per study site. On each day, we downloaded the data from the server, performed data queries, and provided feedback to the research assistants to improve data accuracy.