Fig. 2.

Telemetry-based QTc at baseline and following each dose of hydroxychloroquine and azithromycin in COVID-19 patients (n = 68).

The X-axis represents the number of doses (either hydroxychloroquine alone or hydroxychloroquine and azithromycin) and the Y-axis represents the median QTc interval in milliseconds as measured by remote telemetry. The QTc values measured at baseline and after each drug dose administration were not normally distributed. To account for within-subject variability in QTc measurements at baseline and after each dose, post-hoc analysis of Friedman rank-sum tests was employed.