Data collection
We identified all COVID-19 cases from our laboratory data-base which has
been followed up on a daily basis. Medical records were reviewed and
patients’ demographic, medical and social history was collected.
Laboratory and radiological information were available in the electronic
records. We used a standardised data collection sheet which was used by
all the authors. To assess frailty, we used the clinical frailty score
(CFS) which classify patients in a range of very fit (score 1) to
terminally ill (score 9). 7