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Table 3 Descriptive statistics of Mujer Mas Segura participants by location: Tijuana (n = 284) versus Ciudad Juarez (n = 300)

From: Mujer Mas Segura(Safer Women): a combination prevention intervention to reduce sexual and injection risks among female sex workers who inject drugs

Variable Tijuana (n = 284) Ciudad Juarez (n = 300) Total (n = 584) p
Sociodemographics
Age (years) 34(28,41) 33(27,39) 33(27,40) .11
# of years of education completed 8(6,10) 6(4,8) 6(5,9) <.001
Speaks English 118(41.5%) 39(13.0%) 157(26.9%) <.001
Has a spouse or steady partner 107(37.7%) 118(39.3%) 225(38.5%) .68
Earns average of > = 350 USD** 96(34.3%) 180(60.0%) 276(47.6%) <.001
# years lived in the city of interview 16(8,29) 26(18,34) 22(10,33) <.001
Injection Drug Use History and Risks
Age when first injected drugs 20(17,24) 20(17,27) 20(17,26) .47
Injected > = once per day** 275(96.8%) 274(91.3%) 549(94.0%) .005
Obtained syringes from needle exchange** 26(9.2%) 34(11.3%) 60(10.3%) .39
Syringe confiscated by police in exchange for not being arrested** 78(27.7%) 85(28.3%) 163(28.0%) .86
Often/always injected drugs with a client** 134(47.3%) 52(17.3%) 186(31.9%) <.001
Receptive needle sharing** 271(95.8%) 290(96.7%) 561(96.2%) .57
Divided drugs with used syringe** 178(63.3%) 222(74.0%) 400(68.8%) .006
Used a cooker after someone else had used it** 274(97.2%) 287(95.7%) 561(96.4%) .33
Used a cotton filter after someone else had used it** 256(90.5%) 257(85.7%) 513(88.0%) .08
Shared rinse water 266(94.7%) 283(94.3%) 549(94.5%) .86
Injection Risk Index Score 3.6(2.4,4.2) 3.2(2.4,4.0) 3.6(2.4,4.2) .00
Self-efficacy score for safer drug injection 2.0(2.0,2.8) 2.0(1.8,2.7) 2.0(1.8,2.7) <.001
Sex Work History and Risks
Age when began to work regularly as a FSW 20(17,25) 19(16,25) 19(16,25) .02
# Unprotected vaginal/anal sex acts with spouse/steady partner** 9(2,30) 10(4,30) 9(3,30) .42
Income earned from sex (USD)** 770( 305,1500) 1140( 540,1896) 960( 420,1800) <.001
# male clients** 15(6,30) 68(30,104) 30(10,80) <.001
# vaginal/anal sex acts with clients** 34(12,60) 84(40,127) 51(20,101) <.001
# unprotected vaginal or anal sex acts with clients** 25(5,56) 33(12,65) 30(9,60) <.001
Self-efficacy for condom use score 3.0( 2.6,3.0) 3.0( 2.6,3.0) 3.0( 2.6,3.0) .82
Amount earned per vaginal sex act without condom (USD) 25(20,35) 15(10,20) 20(15,30) <.001
Arrested in the past 6 months 115(40.9%) 147(49.0%) 262(45.1%) .05
HIV/STI Services and Laboratory Test Results
Ever had an HIV test 144(50.9%) 148(49.3%) 292(50.1%) .71
Has seen more access to condoms* 113(42.2%) 52(17.3%) 165(29.0%) <.001
Has seen more access to sterile syringes* 116(43.0%) 48(16.1%) 164(28.8%) <.001
Reports ‘easy access’ to sterile syringes 238(88.5%) 210(70.7%) 448(79.2%) <.001
Tested positive for syphilis 46(16.2%) 96(32.7%) 142(24.6%) <.001
Syphilis titers > =1:8, among lifetime syphilis cases 23(50.0%) 26(26.8%) 49(34.3%) .006
Tested positive for gonorrhea 5(1.8%) 8(2.7%) 13(2.2%) .46
Tested positive for Chlamydia 28(9.9%) 42(14.0%) 70(12.0%) .12
Tested positive for trichomonas 102(35.9%) 94(31.3%) 196(33.6%) .24
Tested positive for bacterial vaginosis 70(24.6%) 158(52.7%) 228(39.0%) <.001
  1. *past year; **past month.
  2. *** Calculated based on methods used in the DUIT intervention [38], comprised of the following: receptive needle sharing, sharing a cooker, cotton filter, or rinse water to prepare drugs for injection after someone else had used it, and using a used syringe to divide drugs. The score was constructed by calculating the average between the responses to these five injection risk indicators (1 = never, 2 = sometimes, 3 = about half the time, 4 = often, and 5 = always), with higher scores representing higher risk.
  3. **** Numbers associated with the continuous variables represent Medians and Interquartile Ranges.