Table 1.
Participant characteristics (N=784)1
| Characteristic | N (%) | Median (range) |
|---|---|---|
| HPV vaccination status | ||
|
| ||
| Received ≥1 HPV vaccine dose | 609 (77.7) | |
| Number of HPV vaccine doses received | ||
| 0 | 175 (22.4) | |
| 1 | 53 (6.8) | |
| 2 | 63 (8.1) | |
| 3+ | 491 (62.8) | |
| Vaccine type received | ||
| ≥1 dose of the 4-valent vaccine | 289 (87.8) | |
| ≥1 dose of the 9-valent vaccine | 40 (12.2) | |
| Age at vaccination | ||
| < 15 years | 429 (71.0) | |
| ≥ 15 years | 175 (29.0) | |
| Sexual initiation status at vaccination | ||
| Initiated sex after vaccination | 406 (67.2) | |
| Initiated sex before vaccination | 198 (32.8) | |
|
| ||
| Recruitment site | ||
|
| ||
| Teen Health Clinic | 543 (69.3) | |
| Health Department | 241 (30.7) | |
|
| ||
| Sociodemographic characteristics | ||
|
| ||
| Age (years) | 19 (13, 26) | |
| 13-17 | 222 (28.3) | |
| 18-21 | 437 (55.7) | |
| ≥22 | 125 (15.9) | |
| Race | ||
| White, Asian, or Pacific Islander | 194 (24.7) | |
| Black | 529 (67.5) | |
| Multiracial, other | 61 (7.8) | |
| Ethnicity | ||
| Non-Hispanic White | 158 (20.2) | |
| Non-Hispanic Black | 528 (67.4) | |
| Others | 98 (12.5) | |
| Appalachian descent | 15 (1.9) | |
| Hispanic ethnicity | 48 (6.1) | |
| Marital status | ||
| Never Married | 765 97.6) | |
| Ever Married | 19 (2.4) | |
| Insurance Plan | ||
| Private health insurance | 85 (10.8) | |
| Public health insurance (Medicaid, Medicaid managed care) | 540 (68.9) | |
| Unsure or missing | 159 (20.3) | |
|
| ||
| Sexual health | ||
|
| ||
| History of STI other than warts | 413 (52.7) | |
| History of chlamydia | 327 (41.7) | |
| History of gonorrhea | 155 (19.8) | |
| History of trichomonas | 196 (25.0) | |
| History of herpes | 44 (5.6) | |
| History of pregnancy | 278 (35.5) | |
|
| ||
| Substance use | ||
|
| ||
| Lifetime smoking | 152 (19.4) | |
| Frequency of smoking, past 30 days | ||
| 0 days | 611 (77.9) | |
| >1 day | 173 (22.1) | |
| Lifetime marijuana use | 415 (52.9) | |
| Marijuana use, past 30 days | ||
| 0 days | 504 (64.6) | |
| >1 day | 276 (35.4) | |
|
| ||
| Sexual behaviors | ||
|
| ||
| Age of first sexual intercourse (anal or vaginal), years | 15 (5, 26) | |
| ≤13 | 104 (13.3) | |
| 14-17 | 599 (76.4) | |
| ≥18 | 81 (10.3) | |
| Number of male sexual partners, lifetime (anal or vaginal) | 3 (0, 200) | |
| ≤1 | 151 (19.3) | |
| 2-5 | 409 (52.4) | |
| 6+ | 221 (28.3) | |
| Number of male sexual partners, past 3 months (anal or vaginal) | 1 (0, 10) | |
| 0 | 74 (9.4) | |
| 1 | 565 (72.1) | |
| 2+ | 145 (18.5) | |
| Number of new male sexual partners, past 3 months (anal or vaginal) | 0 (0, 9) | |
| 0 | 537 (68.5) | |
| 1+ | 247 (31.5) | |
| Number of male sexual partners, past 12 months (anal or vaginal) | 1 (0, 70) | |
| ≤1 | 462 (58.9) | |
| 2+ | 322 (41.1) | |
| Number of new male partners, past 12 months (anal or vaginal) | 1 (0, 40) | |
| ≤1 | 651 (83.0) | |
| 2+ | 133 (17.0) | |
| Number of female sexual partners, lifetime | 0 (0, 50) | |
| 0 | 658 (83.9) | |
| 1+ | 126 (16.1) | |
| Number of female sexual partners, past 3 months | 0 (0, 6) | |
| 0 | 734 (93.6) | |
| 1+ | 50 (6.4) | |
| Number of female sexual partners, past 12 months | 1 (0, 9) | |
| 0 | 760 (96.9) | |
| 1+ | 24 (3.1) | |
| Number of new female sexual partners, past 3 months | 0 (0, 6) | |
| 0 | 712 (90.8) | |
| 1+ | 72 (9.2) | |
| Number of new female sexual partners, past 12 months | 0 (0, 7) | |
| 0 | 737 (94.0) | |
| 1+ | 47 (6.0) | |
| History of anal sex | 164 (20.9) | |
| Number of anal sex partners, past 3 months | 0 (0, 10) | |
| 0 | 704 (89.8) | |
| 1+ | 80 (10.2) | |
| Number of anal sex partners, past 12 months | 1 (0, 12) | |
| 0 | 674 (86.0) | |
| 1+ | 110 (14.0) | |
| History of receiving oral sex, past 3 months | ||
| No | 280 (35.7) | |
| Yes | 504 (64.3) | |
| History of giving oral sex, past 3 months | ||
| No | 377 (48.2) | |
| Yes | 406 (51.9) | |
| Frequency of oral sex (given or received) with any partner | 2 (0, 201) | |
| 0 | 234 (29.9) | |
| 1-5 | 362 (46.3) | |
| 6+ | 186 (23.8) | |
| Is your main sexual partner male? | ||
| No | 27 (3.4) | |
| Yes | 671 (85.6) | |
| Don’t have a main partner | 86 (11.0) | |
| Frequency of condom use with main partner past 3 months | ||
| Less than every time | 550 (70.2) | |
| Every time | 105 (13.4) | |
| Missing, not applicable | 129 (16.5) | |
| Condom use, last sexual encounter with main partner | ||
| No | 429 (54.7) | |
| Yes | 242 (30.9) | |
| Missing, not applicable | 113 (14.4) | |
| Are any of your other sexual partners male? | ||
| No | 65 (8.3) | |
| Yes | 289 (36.9) | |
| Don’t have any other male partner | 429 (54.8) | |
| Frequency of condom use with non-main partners, past 3 months | ||
| Less than every time | 150 (19.1) | |
| Every time | 75 (9.6) | |
| Missing or not applicable | 559 (71.3) | |
| Condom use, last sexual encounter with non-main partner | ||
| No | 101 (12.9) | |
| Yes | 188 (24.0) | |
| Missing or not applicable | 495 (63.1) | |
| Sexual orientation | ||
| Attracted to opposite sex | 652 (83.2) | |
| Attracted to same sex or undecided | 132 (16.8) | |
|
| ||
| Discordance and concurrency | ||
|
| ||
| Discordant by race | ||
| 100% concordant | 614 (78.3) | |
| Any discordant | 157 (20.0) | |
| Do not know for ≥1 of the 3 most recent partners | 13 (1.7) | |
| Discordant by ethnicity | ||
| 100% concordant | 741 (94.5) | |
| Any discordant | 30 (3.8) | |
| Do not know for ≥1 of the 3 most recent partners | 13 (1.7) | |
| Discordant by age | ||
| 100% concordant | 540 (68.9) | |
| Any discordant | 194 (24.7) | |
| Do not know for ≥1 of the 3 most recent partners | 50 (6.4) | |
| Discordant by sexual partnerships, 3 months | ||
| 100% concordant | 268 (34.2) | |
| Any discordant | 126 (16.1) | |
| Do not know for ≥1 of the 3 most recent partners | 390 (49.7) | |
| Discordant by sexual partnerships, 12 months | ||
| 100% concordant | 255 (32.5) | |
| Any discordant | 128 (16.3) | |
| Do not know for ≥1 of the 3 most recent partners | 401 (51.2) | |
| Participant’s three most recent partners’ concurrency practice | ||
| 100% no concurrency | 338 (43.1) | |
| Any concurrency | 127 (16.2) | |
| Do not know for ≥1 of the 3 most recent partners | 319 (40.7) | |
| Participant concurrency practice with the 3 most recent partners | ||
| 100% no concurrency | 551 (70.3) | |
| Any concurrency | 208 (26.5) | |
| Do not know for ≥1 of the 3 most recent partners | 25 (3.2) | |
| Participant lifetime concurrency | ||
| No | 618 (78.8) | |
| Yes or don’t remember | 166 (21.2) | |
1
There were few missing data so missing data are not reported separately in the table: 5 variables had 1 missing value, 3 had 2 missing values, 1 had 3 missing values, and 1 had 4 missing values.