Severe fatigue in the first year following SARS-CoV-2 infection: A prospective cohort study 5 161 Variables in italics are those who were removed from the final model during backwards selection due to statistically insignificant contribution to the model. NA = Not applicable. BMI=Body mass index; OECD= Organisation for Economic Co-operation and Development; LMIC = low- or middle-income country. * COVID-related comorbidities are based on WHO Clinical Management Guidelines[16] and include: cardiovascular disease (including hypertension), chronic pulmonary disease (excluding asthma), renal disease, liver disease, cancer, immunosuppression (excluding HIV, including previous organ transplantation), previous psychiatric illness and dementia. ** Migration background based on country of birth of participant and that of their parents. ***Clinical severity groups defined as: mild as having a RR<20/min and SpO2 on room air >94% at both day 0 and 7; moderate disease as having a RR 20-30/min, SpO2 90-94% and/or receiving oxygen therapy at day 0 or 7; severe disease as having a RR>30/min or SpO2 < 90% at day 0 or 7; critical disease as requiring ICU admission. **** Highest baseline anxiety and sadness scores defined as the highest reported level of anxiety or sadness at D0 and D7 (baseline), subjectively reported on a scale from 0 to 10. ΒΆ Acute presence of a symptom defined as reporting it during the first two weeks after overall illness onset
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