Table 1. Demographic characteristics of participants who were asked both sexual identity questions (n = 2,077).

Response option categories	Gender		Race			Class year*
	Male (n=870) %	Female (n=1207) %	White (n=1409) %	Asian (n=278) %	Other (n=390) %	Freshmen (n=330) %	Sophomore (n=508) %	Junior (n=545) %	Senior (n=683) %
Three-category sexual identity
Heterosexual (n = 2003)	42	58	68	14	19	16	25	26	33
Bisexual (n = 39)	26	74	62	5	33	23	26	18	33
Lesbian/gay (n=35)	74	26	77	3	20	20	11	34	34
Five-category sexual identity
Only heterosexual (n = 1841)	43	57	68	14	18	16	25	26	33
Mostly heterosexual (n =169)	26	74	71	9	20	16	23	25	35
Bisexual (n =26)	23	77	58	12	31	15	19	23	42
Mostly lesbian/gay (n= 18)	67	33	56	6	39	28	11	28	33
Only lesbian/gay (n =23)	78	22	91	0	9	13	17	35	35

^*Note: There were 11 participants indicating “Heterosexual” on the three-category sexual identity question who did not respond with a class level; of these 11 participants, 8 indicated “Only heterosexual” and 3 indicated “Mostly heterosexual” on the five-category sexual identity question