Figure 1.

Taste and smell alterations and COVID-19.

Image ‘a’: the stacked bars represent the percentage of total participants in the case and control groups who had respiratory symptoms (white) or did not have symptoms but had contact with infected persons (black). P-values derived from Fisher’s exact test; *P < 0.05. OR = odd ratio.

Images ‘b’ and ‘d’: the stacked bars represent the percentage of total participants in the case and control groups who had no change (white), a partial change (grey), or a complete loss (black) of taste (b) or smell (d). P-values derived from the Chi-square test; * P < 0.05, **P < 0.01.

Images ‘c’ and ‘e’: the horizontal bar graphs represents the mean ± standard deviation of the change in self-reported taste (c) and smell scores (e) after COVID-19 was suspected. Negative numbers indicate the magnitude of the reduction in taste or smell perception. P-values derived from the Mann–Whitney test; **P < 0.01, ****P < 0.0001.