Statistical methods
A descriptive analysis of the study variables was performed, to identify patients’ personal and clinical characteristics, and their responses to the questionnaire. The qualitative variables are described using absolute frequencies and percentages. Quantitative variables are resumed through their media, median, first and third quartile, and typical deviation.
To compare patients’ responses to the questionnaire according to compatible symptoms of COVID-19 or a positive test result, contingency tables were built with the variables. The association between the qualitative values was evaluated throughout Fisher´s exact test (with Montecarlo simulation of p-value in case of qualitative variables with more than two categories). The comparison of the quantitative variables was done using Mann-Whitney U test. Normalcy between the variables were contrasted using Shapiro-Wilk test. It is considered of significant relevance between variables, a signification level of 0.05. The analysis were performed using R statistic software. (Version 4.0.0).