TABLE 1.
Positivity of C. trachomatis by patient characteristics for each research centera
| Characteristic | No. of subjects chlamydia positive/total (%)b at center:
|
|||||
|---|---|---|---|---|---|---|
| A (n = 564) | B (n = 743) | C (n = 884) | D (n = 771) | E (n = 589) | All (N = 3,551) | |
| Age (yr) | ||||||
| ≤19 | 23/159 (14.5) | 53/157 (33.8) | 55/153 (35.9) | 55/186 (29.6) | 14/81 (17.3) | 200/736 (27.2) |
| 20-24 | 18/165 (10.9) | 57/210 (27.1) | 48/323 (14.9) | 56/227 (24.7) | 14/160 (8.8) | 193/1,085 (17.8) |
| 25-29 | 6/101 (5.9) | 25/155 (16.1) | 18/227 (7.9) | 21/141 (14.9) | 14/171 (8.2) | 84/795 (10.6) |
| ≥29 | 2/136 (1.5) | 24/217 (11.1) | 11/180 (6.1) | 13/217 (6.0) | 4/171 (2.3) | 54/921 (5.9) |
| Unknown | 0/3 (0.0) | 4/4 (100.0) | 1/1 (100.0) | 0/6 (0.0) | 5/14 (35.7) | |
| Race | ||||||
| Black | 17/155 (11.0) | 143/652 (21.9) | 129/814 (15.8) | 89/499 (17.8) | 18/131 (13.7) | 396/2,251 (17.6) |
| White | 15/260 (5.8) | 18/82 (22.0) | 4/61 (6.6) | 54/254 (21.3) | 10/246 (4.1) | 101/903 (11.2) |
| Asian/PI | 7/59 (11.9) | 1/8 (12.5) | 0/8 (0) | 5/63 (7.9) | 13/138 (9.4) | |
| Other/unknown | 10/90 (11.1) | 1/1 (100.0) | 0/1 (0) | 2/18 (11.1) | 13/149 (8.7) | 26/259 (10.0) |
| Clinic type | ||||||
| STD | 33/473 (7.0) | 158/733 (21.6) | 41/149 (27.5) | 145/771 (18.8) | 46/589 (7.8) | 423/2,715 (15.6) |
| Family planning | 92/735 (12.5) | 92/735 (12.5) | ||||
| Primary reason for visit | ||||||
| STD screening | 16/195 (8.2) | 105/526 (20.0) | 17/112 (15.2) | 33/165 (20.0) | 4/96 (4.2) | 175/1,094 (16.0) |
| Family planning | 2/22 (9.1) | 0/1 (0) | 87/673 (12.9) | 2/15 (13.3) | 91/711 (12.8) | |
| Contact with CT | 8/16 (50.0) | 1/1 (100.0) | 4/13 (30.8) | 15/35 (42.9) | 3/6 (50.0) | 31/71 (43.7) |
| Contact with GC | 0/4 (0.0) | 1/4 (25.0) | 8/23 (34.8) | 30/101 (29.7) | 1/7 (14.3) | 40/139 (28.8) |
| Mucopurulent endocervical discharge | ||||||
| Yes | 14/54 (25.9) | 70/223 (31.4) | 16/43 (37.2) | 29/107 (27.1) | 6/22 (27.3) | 135/449 (30.1) |
| No | 35/510 (6.9) | 60/370 (16.2) | 115/834 (13.8) | 113/647 (17.5) | 40/567 (7.1) | 363/2,928 (12.4) |
| Unknown | 33/150 (22.0) | 2/7 (28.6) | 3/17 (17.6) | 38/174 (21.8) | ||
| Cervical culture for N. gonorrhoeae | ||||||
| Positive | 2/8 (25.0) | 34/72 (47.2) | 31/99 (31.3) | 3/13 (23.1) | 70/192 (36.5) | |
| Negative | 33/475 (6.9) | 121/641 (18.9) | 111/666 (16.7) | 41/550 (7.5) | 306/2,332 (13.1) | |
| Not done/unsatisfactory specimen | 14/81 (17.3) | 8/30 (26.7) | 3/6 (50.0) | 2/26 (7.7) | 160/1,027 (15.6) | |
| Dysuria | ||||||
| Yes | 1/35 (2.9) | 7/40 (17.5) | 2/18 (11.1) | 10/44 (22.7) | 1/45 (2.2) | 21/182 (11.5) |
| No | 48/529 (9.1) | 156/703 (22.2) | 131/866 (15.1) | 135/727 (18.6) | 45/544 (8.3) | 515/3,369 (15.3) |
| Hematuria | ||||||
| Yes | 19/170 (11.2) | 46/198 (23.2) | 53/301 (17.6) | 42/201 (20.9) | 12/124 (9.7) | 172/994 (17.3) |
| No | 30/394 (7.6) | 90/438 (20.5) | 58/420 (13.8) | 96/533 (18.0) | 29/387 (7.5) | 303/2,172 (14.0) |
a
CT, C. trachomatis; GC, Neisseria gonorrhoeae; PI, Pacific Island origin.
b
As measured by any single positive test at urine, cervical or urethral site. The prevalence shown is not adjusted for variations in test performance among centers.