SAMPLE SIZE JUSTIFICATION The primary objective of the study was to describe the course of SARS-CoV-2 disease in patients treated or not with IMUNO TF® and a combination of nutraceuticals and who have tested positive in a COVID-19 diagnostic test based on the duration of symptoms.~Sample size calculation was established according to the ICH guidelines, where it was specified that the number of patients should be sufficient to provide a safe response about the issues raised.~The mean duration of mild/moderate symptoms of COVID-19 was 11.5±5.7 days. A sample of 18 patients would be sufficient to estimate, with a 95% confidence and a precision of +/- 2.8 days, a mean duration of symptoms with a standard deviation of 5.7 days. Assuming a loss of 10% of patients, the sample size was 20 patients. Considering the two groups of patients (treated with IMUNO TF® / not treated with IMUNO TF®), the sample size was 40 patients, 20 patients per group. The calculations were performed with the help of the PASS package, version 2011.~DATA PROCESSING Study data were collected in a CRD and inserted the data in a database specifically designed for the study. The database included internal consistency ranges and rules to ensure data quality control.
Multicentre, retrospective, observational study to describe the course of SARS-CoV-2 disease in patients treated or not with IMUNO TF ® and a combination of nutraceuticals and who have tested positive in a COVID-19 diagnostic test based on the duration of symptoms.