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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.