Table IV.

Results from psychophysical tests of smell during SARS-CoV-2 infection. Results are presented as mean plus standard deviation.

Test	Threshold	Discrimination	Identification	TDI score	CCCRC score
Sniffin’ sticks extended test	5.2 ± 1.3	10.8 ± 0.9	10.7 ± 1.0	22.5 ± 7.8	N/A
CCCRC	18.8*	N/A	47.6*	N/A	40.8 ± 14.7
UPSIT	N/A	N/A	25.2 ± 2.5	N/A	N/A
16-item Sniffin’ stick identification test	N/A	N/A	11.6 ± 0.8	N/A	N/A
12-item brief BSIT	N/A	N/A	8.5 ± 0.5	N/A	N/A

BSIT: indicates Brief Smell Identification Test; N/A: not applicable; CCCRC: Connecticut Chemosensory Clinical Research Center test; UPSIT: The University of Pennsylvania Smell Identification test; TDI score: threshold discrimination identification score.

* Results of CCCRC score according to threshold and identification scores were presented only in the article “Objective evaluation of anosmia and ageusia in COVID-19 patients: Single-center experience on 72 cases”. By Vaira LA et al. ⁵⁷.