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Comment
. 2021 May;8(5):360.
doi: 10.1016/S2215-0366(21)00066-3. Epub 2021 Mar 10.

Differential follow-up patterns in COVID-19 and comparison cohorts

Rebecca Fuhrer  1 , James A Hanley  2
Affiliations
Comment

Differential follow-up patterns in COVID-19 and comparison cohorts

Rebecca Fuhrer et al. Lancet Psychiatry. 2021 May.
No abstract available

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Figures

Figure
Figure
Differential follow-up patterns in COVID-19 and influenza cohorts, based on reconstructed numbers of patients being followed up each day Comparison of cumulative incidence curves for (A) and daily numbers of patients at risk of (B) new psychiatric diagnoses (classified by ICD-10: F20–48). The area of each coloured polygon represents the total follow-up time, and each dot represents a case of a first psychiatric diagnosis. The overall numbers of cases of new psychiatric illness in the two cohorts (ie, 302 cases for COVID-19 and 285 cases for influenza) are much closer to each other than are the 90-day cumulative incidences (ie, 5·8% for COVID-19 and 2·8% for influenza). The number of people who were at risk of psychiatric illness (ie, the number of people who were being followed up) were almost equal on day 14 but unequal on day 15 and beyond. The different daily numbers of patients who were at risk of psychiatric illness in the two cohorts raise questions as to how much of the initial matching of risk profiles might have been lost, and how much any imbalances and selectivity might have contributed to the differences in incidence.
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References

    1. Taquet M, Luciano S, Geddes JR, Harrison PJ. Bidirectional associations between COVID-19 and psychiatric disorder: retrospective cohort studies of 62 354 COVID-19 cases in the USA. Lancet Psych. 2021;8:130–140. - PMC - PubMed