"How well do we know our patients?": Further validation of a complexity rating scale for HIV.

Background: Despite advances in the management and treatment of HIV, identifying risks for disengagement are essential to maximize positive outcomes. The current study investigated the validity of the Clinical Complexity Rating Scale for HIV (CCRS-HIV), a risk-prediction tool, by assessing agreement between patient and clinician scores of patient complexity.

Methods: 207 patients completed the patient version of the CCRS-HIV (CCRS-HIV^P), and six Attending Medical Officers (AMOs) caring for those individuals completed the original clinician version (CCRS-HIV^C). Kappa statistics, sensitivity and specificity were used to assess patient-clinician agreement.

Results: Patient-clinician agreement was highest for problematic crystal methamphetamine use (86%), polypharmacy (84%) and other physical health concerns (67%). Cut-offs of 40 and 45 for the total CCRS-HIV score were identified as most appropriate, with high sensitivity (79.31% and 76.0% respectively).

Conclusions: Overall agreement between the clinician and patient complexity scores was high. These findings provide further evidence of the validity of the scale. The study demonstrates that the unique role of AMOs at the center contributes to them knowing their patients well, allowing them to manage and refer when required for interdisciplinary care which likely contributes to their ongoing engagement in care and may account for the high level of agreement.