borderline significancep-value = 0.05
Only 9.4% of individuals had already been diagnosed with COVID-19 prior to the infection that caused hospitalization, with no significant difference with the presence of post-COVID-19 syndrome 6 and 12 months after hospital discharge. However, among patients who were hospitalized due to recurrent COVID-19 infection, 64.7% had three or more symptoms after six months versus 34.4% of patients who had been hospitalized due to the first infection, with a borderline significance level (p-value = 0.05); but this difference was not observed 12 months after discharge.