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Table 1 Characteristics of HIV-negative female sex workers in Tijuana and Ciudad Juarez, Mexico

From: Vaginal washing and lubrication among female sex workers in the Mexico-US border region: implications for the development of vaginal PrEP for HIV prevention

  Tijuana Ciudad Juarez Total p-value
N = 145 N = 150 N = 295
n % n % n %
Sociodemographics
 Median age (years) 38.0 IQR = 31.0–48.0 37.0 IQR = 29.0–44.0 38.0 IQR = 30.0–46.0 0.17
 Born in same state as study site 36 24.8 114 76.0 150 50.9 <  0.0001
 Completed secondary school 61 42.1 69 46.0 130 44.1 0.50
 Married/common-law relationship 36 24.8 43 28.7 79 26.8 0.46
 Median number of children 3.0 IQR = 1.0–4.0 3.0 IQR = 2.0–4.0 3.0 IQR = 2.0–4.0 0.62
 Average monthly income ≥3500 pesos (~ 172 USD) 62 42.8 144 96.0 206 69.8 <  0.0001
Non-commercial sexual partners
 Spouse or steady partner 53 36.6 41 27.3 94 31.9 0.09
  Median % of VS acts with condoms (past month) 0.0 IQR = 0.0–0.0 0.0 IQR = 0.0–0.0 0.0 IQR = 0.0–0.0 0.48
 Any casual partners (past month) 63 43.5 27 18.0 90 30.5 <  0.0001
  Median % of VS acts with condoms (past month) 0.5 IQR = 0.0–1.0 0 IQR = 0.0–0.0 0.0 IQR = 0.0–1.0 0.0001
 Any anonymous partners (past month) 22 15.2 3 2.0 25 8.5 <  0.0001
  Median % of VS acts with condoms (past month) 0.5 IQR = 0.0–1.0 0 IQR = 0.0–0.0 0.5 IQR = 0.0–1.0 0.07
Sex work characteristics
 Main sex work location        <  0.0001
  Bar or nightclub 27 18.6 37 24.7 64 21.7  
  Street 117 80.7 5 3.3 122 41.4  
  Hotel or motel 1 0.7 103 68.7 104 35.3  
  Other 0 0.0 5 3.3 5 1.7  
 Median difference in USD earned for condomless VS 5.0 IQR = 0.0–10.0 3.0 IQR = 0.0–5.0 5.0 IQR = 0.0–7.5 0.51
 Ever forced to have sex or physically abused by a client 53 36.6 54 36.0 107 36.3 0.92
 Median # of clients (past month) 40.0 IQR = 19.0–70.0 46.5 IQR = 28.0–76.0 44.0 IQR = 23.0–74.0 0.07
  Median # regular clients 7.0 IQR = 4.0–15.0 4.0 IQR = 2.0–7.0 5.0 IQR = 3.0–10.0 <  0.0001
  Median # non-regular clients 24.0 IQR = 9.0–56.0 40.0 IQR = 21.0–70.0 32.0 IQR = 12.0–63.0 <  0.0001
 Median % of VS acts with clients with condoms (past month) 0.7 IQR = 0.5–0.9 0.5 IQR = 0.2–0.8 0.6 IQR = 0.3–0.9 <  0.0001
  Median % of VS acts with regular clients with condoms 0.6 IQR = 0.3–0.9 0.0 IQR = 0.0–0.6 0.4 IQR = 0.0–0.8 <  0.0001
  Median % of VS acts with non-regular clients with condoms 0.9 IQR = 0.5–1.0 0.6 IQR = 0.3–0.9 0.8 IQR = 0.4–1.0 <  0.0001
 Any illicit drug use during sex with a client (past month) 53 36.6 69 46.0 122 41.4 0.10
 Any alcohol use during sex with a client (past month) 44 30.3 103 68.7 147 49.8 <  0.0001
Substance Use
 Illicit drug use (past month) 88 60.7 94 62.7 182 61.7 0.73
  Methamphetamine 79 54.5 12 8.0 91 30.9 <  0.0001
  Cocaine 7 4.8 74 49.3 81 27.5 <  0.0001
  Marijuana 42 29.0 34 22.7 76 25.8 0.22
  Heroin 37 25.5 27 18.0 64 21.7 0.12
  Tranquilizers 19 13.1 29 19.3 48 16.3 0.15
  Mexican speedball (methamphetamine + heroin) 20 13.8 0 0.0 20 6.8 <  0.0001
  Speedball (cocaine + heroin) 1 0.7 7 4.7 8 2.7 0.07
  Inhalants 3 2.1 6 4.0 9 3.1 0.50
  Ecstasy 3 2.1 2 1.3 5 1.7 0.68
  Barbiturates 0 0.0 0 0.0 0 0.0
 Injection drug use (past month) 39 26.9 31 20.7 70 23.7 0.21
 Hazardous alcohol consumption (past 12 months) 57 39.3 79 52.7 136 46.1 0.02
Reproductive/sexual health
 Routine gynecological exam (past 6 months) 16 11.0 20 13.3 36 12.2 0.55
 Contraceptive use other than condoms (past 6 months) 25 17.2 121 80.7 146 49.5 <  0.0001
  Tubal ligation 3 12.0 78 64.5 81 55.5  
  Birth control pill 8 32.0 16 13.2 24 16.4  
  Intrauterine device 10 40.0 9 7.4 19 13.0  
  Hormone injection (i.e., Depo-Provera) 2 8.0 10 8.3 12 8.2  
  Other 2 8 9 7.4 11 7.5  
 HIV/STI testing (past 6 months) 58 40.0 41 27.3 99 33.6 0.02
 Current vaginal symptoms 60 41.4 36 24.0 96 32.5 0.001
 Current pain during VS 28 19.3 6 4.0 34 11.5 <  0.0001
 Tested positive for an STI at baseline 41 28.3 15 10.0 56 19.0 <  0.0001
  Gonorrhea 19 13.1 2 1.3 21 7.1 <  0.0001
  Chlamydia 29 20.0 12 8.0 41 13.9 0.003
  Syphilis (titer ≥1:8) 8 5.5 2 1.3 10 3.4 0.06
  1. Numbers may not sum to column totals due to missing data; Percentages may not sum to 100 due to rounding or omission of one category for binary variables
  2. Abbreviations: STI sexually transmitted infection, USD United States dollar, VS vaginal sex