Table 3.
Detailed knowledge about HIV transmission dynamics among 1064 HIV-negative or unknown status gay, bisexual, and other men who have sex with men, United States, August-September 2015.
| Questions assessing detailed knowledge about HIVa transmission dynamics (correct answer) | Validity of selected response, n (%) |
Tested for HIV in the past year (n=528), n (%)b |
Engaged in CASc in the past 3 months (n=509), n (%)d |
| 1. The estimated probability of HIV infection per-act of receptive anal intercourse (receiving the penis into the anus, also known as bottoming) without any means of prevention is _____ per 10,000 exposures. (138) |
|
|
|
| Correct | 486 (45.7) | 254 (52.3) | 233 (47.9) |
| Incorrect | 578 (54.3) | 274 (47.4) | 276 (47.8) |
| 2. The estimated probability of HIV infection per-act of insertive anal intercourse (inserting the penis into the anus, also known as topping) without any means of prevention is _____ per 10,000 exposures. (11) |
|
|
|
| Correct | 493 (46.3) | 252 (51.1) | 238 (48.3) |
| Incorrect | 571 (53.7) | 276 (48.3) | 271 (47.5) |
| 3. The estimated probability of HIV infection per-act of receptive vaginal intercourse (receiving the penis into the vagina) without any means of prevention is _____ per 10,000 exposures. (8) |
|
|
|
| Correct | 348 (32.7) | 170 (48.9) | 160 (46.0) |
| Incorrect | 716 (67.3) | 358 (50.0) | 349 (48.7) |
| 4. The estimated probability of HIV infection per-act of insertive vaginal intercourse (inserting the penis into the vagina) without any means of prevention is _____ per 10,000 exposures. (4) |
|
|
|
| Correct | 224 (21.1) | 106 (47.3) | 105 (46.9) |
| Incorrect | 840 (78.9) | 422 (50.2) | 404 (48.1) |
| 5. The estimated probability of acquiring HIV from kissing without any means of prevention is _____ per 10,000 exposures. (0) |
|
|
|
| Correct | 734 (69.0) | 379 (51.6) | 366 (49.9) |
| Incorrect | 330 (31.0) | 149 (45.2) | 143 (43.3) |
| 6. The estimated probability of acquiring HIV from needle-sharing during injection drug use without any means of prevention is _____ per 10,000 exposures. (63) |
|
|
|
| Correct | 707 (66.4) | 359 (50.8) | 343 (48.5) |
| Incorrect | 357 (33.6) | 169 (47.3) | 166 (46.5) |
| 7. The estimated probability of acquiring HIV from a mosquito bite without any means of prevention is _____ per 10,000 exposures. (0) |
|
|
|
| Correct | 653 (61.4) | 338 (51.8) | 310 (47.5) |
| Incorrect | 411 (38.6) | 190 (46.2) | 199 (48.4) |
| 8. What is the probability of acquiring HIV from receptive or insertive oral sex without using any means of prevention? (Extremely low) |
|
|
|
| Correct | 676 (63.5) | 345 (51.0) | 337 (49.9) |
| Incorrect | 388 (36.5) | 183 (47.2) | 172 (44.3) |
aHIV: human immunodeficiency virus.
bPercentages indicate the proportion who had been tested for HIV in the past year within each stratum of response validity.
cCAS: condomless anal sex.
dPercentages indicate the proportion who engaged in CAS in the past 3 months within each stratum of response validity.