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Multivariable logistic regression model to identify pre-existing risk factors for long COVID. Odds ratios (with 95% confidence intervals) for the presence of a) any category of persistent symptoms (n=127) at the time of follow-up and b) two or more coexisting categories of persistent symptoms (n=73) at the time of follow-up. Neurological conditions and allergic diseases are specified in table 1. Odds ratios are plotted on a log scale.
