Table 2.
Characteristics of the unweighted and weighted sample, overall and by frequency of penile vaginal intercourse, n = 7055 Americans age 18–49, 2009 and 2018
| Characteristic | Unweighted overall | Weighted overall | No penile vaginal intercourse | Penile vaginal intercourse < once/week | Penile vaginal intercourse at least once/week | p-value* |
|---|---|---|---|---|---|---|
| N = 7055 | N = 6789 | N = 1715 | N = 2359 | N = 2388 | ||
| N (%) | N (%) | N (%) | N (%) | N (%) | ||
| Sex | .116 | |||||
| Female | 3598 (51.0) | 3478 (51.2) | 844 (49.2) | 1213 (51.4) | 1254 (52.5) | |
| Male | 3457 (49.0) | 3311 (48.8) | 870 (50.8) | 1146 (48.6) | 1134 (47.5) | |
| Age group | < .0001 | |||||
| 18–24 | 915 (13.0) | 1087 (16.0) | 467 (27.2) | 254 (10.8) | 307 (12.9) | |
| 25–29 | 1360 (19.3) | 1547 (22.8) | 317 (18.5) | 521 (22.1) | 622 (26.1) | |
| 30–39 | 2331 (33.0) | 2018 (29.7) | 403 (23.5) | 766 (32.5) | 770 (32.2) | |
| 40–49 | 2449 (34.7) | 2138 (31.5) | 528 (30.8) | 818 (35.7) | 689 (28.8) | |
| Race/ethnicity | < .0001 | |||||
| White, non-Hispanic | 4517 (64.0) | 4136 (60.9) | 950 (55.4) | 1504 (63.8) | 1524 (63.8) | |
| Black, non-Hispanic | 1118 (15.9) | 806 (11.9) | 246 (14.3) | 272 (11.5) | 241 (10.1) | |
| Other or 2 + races, non-Hispanic | 523 (7.4) | 565 (8.3) | 163 (9.5) | 201 (8.5) | 152 (6.4) | |
| Hispanic | 897 (12.7) | 1283 (18.9) | 356 (20.7) | 381 (16.2) | 471 (19.7) | |
| Marital status | < .0001 | |||||
| Married or living with partner | 3993 (56.6) | 3890 (57.3) | 375 (21.8) | 1559 (66.1) | 1777 (74.4) | |
| Separated/divorced | 590 (8.4) | 515 (7.6) | 160 (9.3) | 189 (8.0) | 147 (6.1) | |
| Widowed | 30 (0.4) | 34 (0.5) | 12 (0.7) | 8 (0.4) | 14 (0.6) | |
| Never married | 2442 (34.6) | 2350 (34.6) | 1169 (68.2) | 602 (25.5) | 450 (18.9) | |
| Household income | < .0001 | |||||
| < $25 k | 1267 (18.0) | 987 (14.5) | 378 (22.0) | 271 (11.5) | 287 (12.0) | |
| $25–49 k | 1618 (22.9) | 1587 (23.4) | 464 (27.0) | 492 (20.9) | 540 (22.6) | |
| $50–74 k | 1443 (20.5) | 1363 (20.1) | 302 (17.6) | 485 (20.6) | 509 (21.3) | |
| $75–124 k | 1813 (25.7) | 1731 (25.5) | 350 (20.4) | 646 (27.4) | 668 (28.0) | |
| $125 k + | 914 (13.0) | 1122 (16.5) | 222 (12.9) | 465 (19.7) | 384 (16.1) | |
| Education | < .0001 | |||||
| Less than high school | 592 (8.4) | 705 (10.4) | 205 (11.9) | 200 (8.5) | 247 (10.3) | |
| High school | 1637 (23.2) | 1844 (27.1) | 507 (29.6) | 585 (24.8) | 649 (27.2) | |
| Some college | 2081 (29.5) | 2060 (30.3) | 557 (32.5) | 689 (29.2) | 731 (30.6) | |
| Bachelor’s degree or higher | 2745 (38.9) | 2181 (32.1) | 446 (26.0) | 885 (37.5) | 762 (31.9) | |
| Employment status | < .0001 | |||||
| Currently employed | 5445 (77.2) | 5123 (75.5) | 1159 (67.6) | 1876 (79.6) | 1840 (77.1) | |
| Currently unemployed | 1610 (22.8) | 1666 (24.5) | 556 (32.4) | 482 (20.5) | 547.7 (22.9) | |
| Year | < .0001 | |||||
| 2009 | 3335 (47.3) | 3070 (45.2) | 691 (40.3) | 972 (41.2) | 1254 (52.5) | |
| 2018 | 3720 (52.7) | 3719 (54.8) | 1024 (59.7) | 1386 (58.8) | 1134 (47.5) | |
| Sexual repertoire categories (at least once in the past year) | ||||||
| Masturbate alone | 4752 (74.4) | 4716 (72.6) | 1115 (65.8) | 1836 (79.0) | 1683 (71.2) | < .0001 |
| Masturbate with partner | 2417 (37.8) | 2439 (37.5) | 263 (15.4) | 897 (38.6) | 1230 (52.2) | < .0001 |
| Gave oral sex | 4074 (63.4) | 4090 (62.7) | 319 (18.7) | 1690 (72.0) | 2018 (85.3) | < .0001 |
| Received oral sex | 4174 (65.0) | 4206 (64.4) | 327 (19.1) | 1737 (74.3) | 2076 (87.6) | < .0001 |
| Penile-vaginal intercourse | 4774 (74.6) | 4810 (74.0) | 26 (1.5) | 2359 (100.0) | 2388 (100.0) | < .0001 |
| Anal intercourse | 1183 (18.4) | 1224 (18.8) | 138 (8.1) | 404 (17.2) | 665 (28.1) | < .0001 |
*p-values are for chi-square tests