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age.at.first.intercourse (in Sexual History)

At what age did you first have vaginal intercourse?

This variable, age.at.first.intercourse, is used in the construction of the variables, age.at.first.intercourse.r and virgin.

students (age_at_first_intercourse)
	All Rs		Female		Male
Not applicable	6968	28.89%	4595	27.89%	2264	30.35%
12 or younger	176	0.73%	82	0.50%	91	1.22%
13	313	1.30%	190	1.15%	122	1.64%
14	842	3.49%	602	3.65%	236	3.16%
15	2142	8.88%	1604	9.73%	532	7.13%
16	3478	14.42%	2500	15.17%	966	12.95%
17	3655	15.15%	2456	14.91%	1187	15.91%
18	3753	15.56%	2506	15.21%	1229	16.47%
19	1497	6.21%	1044	6.34%	444	5.95%
20	728	3.02%	503	3.05%	223	2.99%
21	333	1.38%	234	1.42%	94	1.26%
22	99	0.41%	69	0.42%	30	0.40%
23	135	0.56%	92	0.56%	42	0.56%
Missing	12 (0.05%)	–	2 (0.01%)	–	1 (0.01%)	–
Total	24131	100%	16479	100%	7461	100%

Not applicable        12 or younger        13        14        15        16        17        18        19        20        21        22        23

5137, 3214, 2474, 2295, 353 2037, 1430, 1160, 980, 216

Not applicable        12 or younger        13        14        15        16        17        18        19        20        21        22        23

3537, 2040, 1598, 1477, 215 1496, 895, 729, 615, 130

These graphs reflect only undergraduates attending 4-year colleges who are of normative age -- 18, 19, 20, 21, or 22, +/- 1, for freshman, sophomores, juniors, seniors, and later undergraduates, respectively. Solid lines represent women. Dotted lines represent men.

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