Table S1.

Rate of patients of the intervention group and the non-intervention group changes over time in items of the taste and smell questionnaire

Items of the questionnaire1	Answer options	Intervention group (n=25)	Non-intervention group (n=27)
1. How would you describe your nasal congestion compared to your last visit?	Worse	0% (n=0)	11% (n=3)
	Equal	76% (n=19)	44% (n=12)
	A little better	16% (n=4)	11% (n=3)
	Much better	0% (n=0)	15% (n=4)
	I have no problem with that anymore	0% (n=0)	0% (n=0)
	I never had a problem with it	8% (n=2)	19% (n=5)
2. How would you describe your smell perception compared to your last visit?	Worse	0% (n=0)	15% (n=4)
	Equal	60% (n=15)	48% (n=13)
	A little better	12% (n=3)	19% (n=5)
	Much better	20% (n=5)	11% (n=3)
	I have no problem with that anymore	8% (n=2)	0% (n=0)
	I never had a problem with it	0% (n=0)	7% (n=2)
3. How would you describe your perception of flavors compared to your last visit?	Worse	4% (n=1)	30% (n=8)
	Equal	44% (n=11)	30% (n=8)
	A little better	16% (n=4)	22% (n=6)
	Much better	36% (n=9)	19% (n=5)
	I have no problem with that anymore	0% (n=0)	0% (n=0)
	I never had a problem with it	0% (n=0)	0% (n=0)
4. How would you describe your taste perception (sweet, sour, bitter, salty) compared to your last visit?	Worse	4% (n=1)	30% (n=8)
	Equal	32% (n=8)	33% (n=9)
	A little better	28% (n=7)	22% (n=6)
	Much better	36% (n=9)	15% (n=4)
	I have no problem with that anymore	0% (n=0)	0% (n=0)
	I never had a problem with it	0% (n=0)	0% (n=0)
5. How would you describe the mouth/tongue burning compared to your last visit?	Worse	4% (n=1)	11% (n=3)
	Equal	20% (n=5)	15% (n=4)
	A little better	16% (n=4)	0% (n=0)
	Much better	4% (n=1)	4% (n=1)
	I have no problem with that anymore	12% (n=3)	4% (n=1)
	I never had a problem with it	44% (n=11)	67% (n=18)