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Table 2 Characteristics of the participant demographics, stratified by PrEP experience

From: Preferences for pre-exposure prophylaxis among U.S. military men who have sex with men: results of an adaptive choice based conjoint analysis study

Index Total sample (n = 429) PrEP-experienced (n = 357) No PrEP experience (n = 72) P
Age (\( \overline{x} \) ± s) 29.9 ± 4.7 30.0 ± 4.4 29.5 ± 5.7 0.42
Gender [n(%)] 0.48
 Male 415 (96.7) 346 (96.9) 69 (95.8)  
 Trans female 11 (2.6) 8 (2.2) 3 (4.2)  
 Trans male 3 (0.7) 3 (0.8) 0 (0.0)  
Race [n(%)] 0.46
 White 309 (72.0) 253 (70.9) 56 (77.8)  
 Black 78 (18.2) 70 (19.6) 8 (11.1)  
 All other race 42 (9.8) 34 (9.5) 8 (11.1)  
Ethnicity [n(%)] <  0.01**
 Hispanic 118 (27.5) 109 (30.5) 9 (12.5)  
 Non-hispanic 311 (72.5) 248 (69.5) 63 (87.5)  
Rank [n(%)] 0.27
 Enlisted 161 (37.5) 133 (37.3) 28 (38.9)  
 Officer 199 (46.4) 161 (45.1) 38 (52.8)  
 Warrant 69 (16.1) 63 (17.6) 6 (8.3)  
Education [n(%)] <  0.05*
 High school 28 (6.5) 18 (5) 10 (13.9)  
 AD or some college 169 (39.4) 147 (41.2) 22 (30.6)  
 Bachelor’s degree 188 (43.8) 159 (44.5) 29 (40.3)  
 Grad/Prof degree 44 (10.3) 33 (9.2) 11 (15.3)  
Military branch [n(%)] 0.07
 Air force 65 (15.2) 47 (13.2) 18 (25.0)  
 Army 209 (48.7) 181 (50.7) 28 (38.9)  
 Coast guard 49 (11.4) 40 (11.2) 9 (12.5)  
 Marine corps 48 (11.2) 38 (10.6) 10 (13.9)  
 Navy 58 (13.5) 51 (14.3) 7 (9.7)  
Region of station [n(%)] a <  0.001***
 Midwest 55 (12.8) 45 (12.6) 10 (13.9)  
 Northeast 79 (18.4) 74 (20.7) 5 (6.9)  
 South 161 (37.5) 139 (38.9) 22 (30.6)  
 West 129 (30.1) 97 (27.2) 32 (44.4)  
 Other/OCONUS 5 (1.2) 2 (0.6) 3 (4.2)  
Depression PHQ2 screening [n(%)] b 0.40
  ≥ 1 269 (62.7) 227 (63.6) 42 (58.3)  
  = 0 160 (37.3) 130 (36.4) 30 (41.7)  
HIRI-MSM risk score [n(%)] c 0.17
  ≥ 10 383 (89.3) 322 (90.2) 61 (84.7)  
  < 10 46 (10.7) 35 (9.8) 11 (15.3)  
# of male sex partners last 6 months [n(%)] <  0.01**
 0–5 partners 303 (70.6) 242 (67.8) 61 (84.7)  
 6+ partners 126 (29.4) 115 (32.2) 11 (15.3)  
# CRAS within last 6 months [n(%)] d 0.61
 None 69 (16.1) 56 (15.7) 13 (18.1)  
 About once/month or less 249 (58.0) 211 (59.1) 38 (52.8)  
 About once/week or more 111 (25.9) 90 (25.2) 21 (29.2)  
# of HIV+ partners last 6 months [n(%)] e <  0.001***
 0 partners 268 (62.5) 205 (57.4) 63 (87.5)  
 1 or more partners 161 (37.5) 152 (42.6) 9 (12.5)  
Satisfied w/current level of HIV protection [n(%)] <  0.01**
 Satisfied 356 (83.0) 304 (85.2) 52 (72.2)  
 Unsatisfied 73 (17.0) 53 (14.8) 20 (27.8)  
Level of comfort discussing sex life w/PCP [n(%)] 0.42
 Extremely uncomfortable 37 (8.6) 31 (8.7) 6 (8.3)  
 Mostly uncomfortable 121 (28.2) 95 (26.6) 26 (36.1)  
 Mostly comfortable 209 (38.7) 179 (50.1) 30 (41.7)  
 Extremely comfortable 62 (14.5) 52 (14.6) 10 (13.9)  
  1. aStates within the U.S. Midwest (IA, IL, IN, KS, MI, MN, MO, ND, NE, OH, SD, WI), Northeast (CT, DC, DE, MA, MD, ME, NH, NJ, NY, PA, RI, VT), South (AL, AR, FL, GA, KY, LA, MS, NC, SC, TN, VA, WV, AZ, NM, OK, TX), West (AK, CA, CO, HI, ID, MT, NV, OR, UT, WA, WY), other/OCONUS (overseas, out of country)
  2. bYes/no PHQ2 version. Scores ≥1 positive screen [41]
  3. c1–47 range. Scores ≥10 defined as high risk for HIV [42]
  4. dThe number of condomless receptive anal sex (CRAS) within the past 6 months
  5. eThe number of sex partners that were HIV-positive in the past 6 months
  6. PrEP pre-exposure prophylaxis, AD active-duty, OCONUS Outside Continental United States, PHQ2 patient health questionnaire-2, HIRI-MSM HIV incidence risk index for men who have sex with men, CRAS condomless receptive anal sex, HIV human immunodeficiency virus, PCP Primary care provider
  7. *P < 0.05; **P < 0.01; ***P < 0.001