Table 1.

Comparative study chart of the percentage of patients with olfactory and gustatory symptoms and their time of onset in COVID patients

Number of subjects	Percentage (number) of patients with olfactory and gustatory Symptoms	Onset of symptoms	Reference
72	12.5% (09) Taste disorder only 14.4% (14) Smell Disorder 30 (41.41) both disorders	Early symptoms within 05 days of admission	[21]
3191	15.3% (488) have Anosmia and ageusia	Early symptoms	[20]
214	5.1% (11) Anosmia 5.6% (12) ageusia	Not Reported	[25]
41	68% (28) anosmia/ageusia	Approx 12 days after infection	[27]
320	19.4% (62) chemosensory dysfunction	Not Mentioned	[28]
59	10.6% (06) taste disorder 5% (03) olfactory disorder 18.6% (11) mixed disorder	Early as well as delayed onset	[29]
417	85.6% (357) olfactory disorder 88.8% (342) gustatory disorder	Not Mentioned	[26]