Characteristics of young people participating in a community-based chlamydia screening programme in California (n=1450)
| Variable | Women (n = 734) [n (%)] | Men (n=716) [n (%)] | Total (n=1450) [n (%)] |
|---|---|---|---|
| Mean age (years) | 18.0 | 17.2 | 17.6 |
| Race | |||
| White | 172 (23.4) | 191 (26.7) | 363 (25.0) |
| African American | 99 (13.5) | 92 (12.9) | 191 (13.2) |
| Hispanic | 402 (54.8) | 348 (48.6) | 750 (51.7) |
| Other | 56 (7.6) | 83 (11.6) | 139 (9.6) |
| Mean number of partners per year of sexual activity* | 1.4 | 2.1 | 1.7 |
| Mean age at first sex (years) | 14.8 | 13.9 | 14.4 |
| Mean number of lifetime partners | 4.3 | 7.6 | 5.9 |
| Duration of sexual relationship | |||
| <1 month | 114 (15.5) | 222 (31.0) | 336 (23.2) |
| 1–6 months | 191 (26.0) | 220 (30.7) | 411 (28.3) |
| 7–12 months | 96 (13.1) | 64 (8.9) | 160 (11.0) |
| ≥1 year | 292 (39.8) | 114 (28.1) | 406 (28.0) |
| Missing | 41 (5.6) | 96 (13.4) | 137 (9.5) |
| Contraceptive method with most recent partner | |||
| Nothing | 196 (26.7) | 107 (14.9) | 303 (20.9) |
| Condom only | 321 (43.7) | 462 (64.5) | 783 (54.0) |
| Hormonal contraception only | 86 (11.7) | 47 (6.6) | 133 (9.2) |
| Dual method | 124 (16.9) | 100 (14.0) | 224 (15.5) |
| Other | 7 (1.0) | 0 (0.0) | 7 (0.5) |
| Condom use at last sex | |||
| Yes | 278 (37.9) | 420 (58.7) | 698 (48.1) |
| No | 439 (59.8) | 251 (35.1) | 690 (47.6) |
| Don't know/missing | 17 (2.3) | 45 (6.3) | 62 (4.3) |
| Condom use in last 3 months | |||
| Never/sometimes | 373 (50.8) | 205 (28.6) | 578 (39.9) |
| Always/usually | 217 (29.6) | 306 (42.7) | 523 (36.1) |
| No sex in last 3 months | 121 (16.5) | 187 (26.1) | 308 (21.2) |
| Missing | 23 (3.1) | 18 (2.5) | 41 (2.8) |
| STI result | |||
| Negative CT and GC | 663 (90.3) | 693 (96.8) | 1356 (93.5) |
| Positive CT only | 59 (8.0) | 20 (2.3) | 79 (5.5) |
| Positive GC only | 6 (0.8) | 2 (0.3) | 8 (0.6) |
| Positive CT and GC | 2 (0.3) | 0 (0.0) | 2 (0.1) |
*Number of lifetime partners per year of sexual activity was calculated by dividing the number of lifetime partners by the number of years since sexual debut. The composite variable provides an estimate of relative sexual activity that is not biased by the age of the respondent.
CT, Chlamydia trachomatis; GC, Neisseria gonorrhoeae; STI, sexually transmitted infection.