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. 2021 Sep 13;178(1):129–136. doi: 10.1016/j.neurol.2021.08.002

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Fig. 3 — Kaplan-Meier curve of survival probability. The dashed lines represent median survival and p values show if there is a difference between the survival curves using rank tests. Top: COV (light gray) and NDD (black) groups. Middle: COV (dark gray), COV + AD (black), and COV + PD (light gray). Bottom: COV + AD (black) and COV + PD (light gray). COV: Patient with a confirmed diagnosis of COVID-19 infection; AD: Alzheimer's Disease; PD: Parkinson's Disease.