Table 1.
Study Participant Characteristics
| Participant Characteristics | Control (n = 37) | PrEP (n = 37) | P Valuea | SMD |
|---|---|---|---|---|
| Age [mean (sd), median] | 30.1 (6.7), 29 | 29.8 (6.5), 28 | .85 | .05 |
| Race/Ethnicity (n, %) | .90 | .12 | ||
| Black Non-Hispanic | 19 (51.4) | 21 (56.8) | ||
| Hispanic | 13 (35.1) | 12 (32.4) | ||
| Other Non-Hispanic | 5 (13.5) | 4 (10.8) | ||
| Obese (BMI >30 or waist >40 inches) (n, %) | 17 (45.9) | 13 (35.1) | .88 | .22 |
| Duration of PrEP use (weeks) [mean (sd), median] | NA | 54.4 (56), 40.9 | NA | NA |
| Recent RAI (7 days) (n, %) | 16 (43.2) | 17 (45.9) | .99 | .05 |
| Number of RAI acts (30 days) [mean (sd), median] | 2.1 (5.5), 0 | 2.2 (4.5), 0 | .91 | .03 |
| Methamphetamine useb (n, %) | .99 | .07 | ||
| Daily | 1 (2.7) | 1 (2.7) | ||
| Weekly | 0 (0.0) | 0 (0.0) | ||
| Monthly/less | 7 (18.9) | 6 (16.2) | ||
| Never | 29 (78.4) | 30 (81.1) | ||
| Marijuana use (n, %) | .77 | .26 | ||
| Daily | 11 (29.7) | 9 (24.3) | ||
| Weekly | 6 (16.2) | 5 (13.5) | ||
| Monthly/less | 13 (35.1) | 12 (32.4) | ||
| Never | 7 (18.9) | 11 (29.7) | ||
| Smoking (n, %) | .70 | .20 | ||
| >1 pack/day | 2 (5.4) | 1 (2.7) | ||
| <1 pack/day | 11 (29.7) | 9 (24.3) | ||
| Nonsmoker | 24 (64.9) | 27 (73.0) | ||
| Binge alcohol use (n, %) | .99 | .06 | ||
| Weekly | 1 (2.7) | 1 (2.7) | ||
| Monthly/less | 26 (70.3) | 27 (73.0) | ||
| Never | 10 (27.0) | 9 (24.3) | ||
| Antibiotic use in past monthc (n, %) | 4 (10.8) | 4 (10.8) | .99 | 0 |
Abbreviations: BMI, body mass index; NA, not applicable; PrEP, pre-exposure prophylaxis; RAI, receptive anal intercourse; sd, standard deviation; SMD, standardized mean difference.
a t tests were used for continuous variables, and Fisher’s exact tests were used for categorical variables.
bSubstance use data refers to past 6 month and was collected by self-report. Binge alcohol refers to >6 drinks at a time on more than 1 occasion.
cAntibiotics included single-dose azithromycin, ceftriaxone, or doxycycline only.