Naïve and corrected plots of “retention in care.”

<p>Retention in care is defined as the fraction of patients who remain alive and in HIV care. The naïve estimate assumes that all patients who are lost to follow-up from the ISS clinic are no longer retained in care. The corrected estimates of retention in care are based on outcomes ascertained from a sample of patients who were lost to follow-up from the ISS Clinic, sought in the community and in whom updated information about vital status and HIV care was obtained. If a tracked patient was found to be alive by report of an informant, we did not ask that informant whether the patient was still in HIV care because this could inadvertently violate the privacy of the patient. Therefore, we conducted a sensitivity analysis under two assumptions. The “pessimistic” corrected estimate is based on the assumption that all patients who were alive but not directly interviewed in person were no longer in HIV care. The “optimistic” corrected estimate was based on the assumption that all patients who were reported to be alive but not directly interviewed in person remained in HIV care.