Incidence, co-occurrence, and evolution of long-COVID features: A 6-month retrospective cohort study of 273,618 survivors of COVID-19
The total length of the bars represents the incidence over the entire 1–180-day period. The contributions to this overall incidence are provided in terms of incidence of features that occurred in the 1–90-day period only (i.e., those that did not recur in the 90–180-day period), incidence of features that occurred in the 90–180 days only (i.e., those that had not already occurred in the 1–90-day period), and incidence of features that occurred in the 1–90-day period and recurred in the 90–180-day period. As can be seen by comparing the 2 darker shades of the bottom bar, 60.1% of patients with a feature recorded for the first time in the 90–180 days after diagnosis had at least one feature recorded in the first 90 days. COVID-19, Coronavirus Disease 2019.