Table 2. Clinical data of recurrent respiratory papillomatosis (RRP) patients harboring human papillomavirus type -6a and -6vc (HPV-6a and -6vc) related variants.

	HPV-6a-related	HPV-6vc-related	p-value
JORRP	n = 0	n = 7	P = 0.02 a
AORRP	n = 4	n = 2
Mean Derkay score	6.4 (CI 95%: 4.8 to 7.9)	6.8 (CI 95%: 6.3 to 7.3)	P = 0.46 b

Abbreviations: JORRP, juvenile onset recurrent respiratory papillomatosis; AORRP adult onset recurrent respiratory papillomatosis.

^a Fisher's exact test.

^b T-test.