Table 1.

Baseline characteristics of participants in the MHOC study with at least two study visits with valid HPV tests (data collected in Ann Arbor, Michigan, USA, 2015–2017, analysed 2018–2020)

	Full cohort (N=317)		Cervicogenital substudy cohort (N=115)
	%	n	%	n
Age
18	29	91	25	29
19–22	33	104	32	37
23–29	12	38	11	13
30–49	12	37	16	18
50+	15	47	16	18
Sex
Female	68	216	100	115
Male	32	101	0	0
Race
White	60	189	64	74
Asian	23	73	18	21
Black/Hispanic/multiracial/unknown	17	55	17	20
Marital/partner status
Never married/partnered	77	243	73	84
Ever married/partnered	23	72	27	31
Circumcised (male only)
Yes	68	69	—	—
No	31	31	—	—
Ever diagnosed with STI*
No	93	296	92	106
Yes	7	21	8	9
HPV vaccination
No	45	142	45	52
Yes	48	152	50	58
Alcohol use
Never or non-current	31	99	27	31
Current	66	210	71	82
Ever cigarette use
Never	77	246	78	90
Ever	21	68	21	24
Ever marijuana use
Never	54	171	53	61
Ever	41	130	44	51
Sexual attraction
Only to another gender	72	229	73	84
Mostly to another gender	15	46	20	23
Equal or mostly/only to same gender	10	33	3	4
Deep kissing partners (6 months)
0	42	132	79	91
1	34	109	14	16
2+	24	76	7	8
Vaginal, oral or anal sex partners (6 months)
0	39	124	35	40
1	43	137	44	51
2+	17	54	21	24
Vaginal sex partners (6 months)
0	49	154	43	50
1	38	120	38	44
2+	13	41	18	21
Received oral sex partners (6 months)
0	48	152	42	48
1	36	112	39	45
2+	16	51	19	22
Performed oral sex partners (6 months)
0	52	165	44	51
1	35	110	43	49
2+	13	40	13	15
Anal sex partners (6 months)
0	89	279	89	101
1+	11	34	11	12

Percentages may not add up to 100% as participants could refuse to answer questions.

*Other than HPV.

HPV, human papillomavirus; MHOC, Michigan HPV and Oropharyngeal Cancer; STI, sexually transmitted infection.