Table 2

Descriptive statistics of Mujer Mas Segura participants by intervention group at baseline (n = 584)
Variable Didactic control (n = 144) Injection Risk Intervention (n = 146) Sex Risk Intervention (n = 148) Both, Injection and Sex Risk Intervention (n = 146) Total (n = 584) p
Sociodemographics
Age (years) 33(27,42) 32(27,40) 34(29,40) 34(28,40) 33(27,40) .55
# of years of education completed 7(5,9) 6(5,9) 6(5,9) 6(6,9) 6(5,9) .94
Speaks English 45(31.3%) 43(29.5%) 31(20.9%) 38(26.0%) 157(26.9%) .20
Has a spouse or steady partner 57(39.6%) 54(37.0%) 48(32.4%) 66(45.2%) 225(38.5%) .15
Earns average of > = 350 USD** 63(43.8%) 75(51.7%) 69(47.6%) 69(47.3%) 276(47.6%) .60
# years lived in the city of interview 22(9,31) 21(10,29) 23(10,33) 23(12,34) 22(10,33) .43
Injection Drug Use History and Risks
Age when first injected drugs 21(17,27) 19(17,24) 19(16,27) 20(18,24) 20(17,26) .45
Injected > = once per day** 137(95.1%) 140(95.9%) 135(91.2%) 137(93.8%) 549(94.0%) .35
Obtained syringes from needle exchange** 7(4.9%) 14(9.6%) 19(12.8%) 20(13.8%) 60(10.3%) .05
Syringe confiscated by police in exchange for not being arrested** 41(28.5%) 39(26.9%) 43(29.3%) 40(27.4%) 163(28.0%) .97
Often/always injected drugs with a client** 46(31.9%) 41(28.3%) 44(29.7%) 55(37.7%) 186(31.9%) .33
Receptive needle sharing** 140(97.2%) 140(95.9%) 143(96.6%) 138(95.2%) 561(96.2%) .81
Divided drugs with used syringe** 101(70.6%) 111(76.6%) 104(70.7%) 84(57.5%) 400(68.8%) .00
Used a cooker after someone else had used it** 138(96.5%) 140(95.9%) 144(97.3%) 139(95.9%) 561(96.4%) .90
Used a cotton filter after someone else had used it** 128(88.9%) 127(87.0%) 130(87.8%) 128(88.3%) 513(88.0%) .97
Sharing rinse water 137(95.8%) 138(94.5%) 139(94.6%) 135(93.1%) 549(94.5%) .80
Injection Risk Index Score*** 3.4( 2.4,4.2) 3.6( 2.4,4.2) 3.6( 2.4,4.0) 3.6( 2.4,4.2) 3.6( 2.4,4.2) .70
Self-efficacy score for safer drug injection 2.0( 1.8,2.5) 2.1( 2.0,2.7) 2.0( 1.8,2.6) 2.0( 2.0,2.7) 2.0( 1.8,2.7) .67
Age when began to work regularly as a FSW 19(15,25) 19(16,25) 19(16,24) 20(17,25) 19(16,25) .22
# Unprotected vaginal/anal sex acts with spouse/steady partner** 8(1,30) 12(4,30) 12(4,30) 8(3,26) 9(3,30) .53
Income earned from sex (USD)** 885 (286,1883) 975 (440,1740) 1050 (450,1660) 906 (420,1860) 960 (420,1800) .97
# male clients** 28(10,80) 30(10,84) 38(11,76) 31(14,74) 30(10,80) .81
# vaginal/anal sex acts with clients** 49(15,109) 57(20,96) 52(20,111) 50(21,100) 51(20,101) .94
# unprotected vaginal or anal sex acts with clients** 27(6,60) 30(12,57) 33(8,63) 30(8,58) 30(9,60) .86
Self-efficacy for condom use score 3.0( 2.4,3.0) 3.0( 2.6,3.0) 3.0( 2.6,3.0) 3.0( 2.8,3.0) 3.0( 2.6,3.0) .17
Sex Work History and Risks
Amount earned per vaginal sex act without condom (USD) 20(13,30) 20(15,30) 20(10,30) 20(15,30) 20(15,30) .95
Arrested in the past 6 months 68(47.2%) 69(47.6%) 64(43.5%) 61(42.1%) 262(45.1%) .73
HIV/STI Services and Laboratory Test Results
Ever had an HIV test 74(51.4%) 76(52.1%) 76(51.4%) 66(45.5%) 292(50.1%) .65
Has seen more access to condoms* 38(26.8%) 40(28.6%) 44(30.8%) 43(30.1%) 165(29.0%) .88
Has seen more access to sterile syringes* 34(23.9%) 36(25.5%) 42(29.6%) 52(36.1%) 164(28.8%) .10
Reports ‘easy access’ to sterile syringes 105(75.5%) 117(81.8) 116(81.1) 110(78.0) 448(79.2%) .54
Tested positive for syphilis 35(24.5%) 36(25.0%) 37(25.3%) 34(23.4%) 142(24.6%) .98
Syphilis titers > =1:8, among lifetime syphilis cases 10(28.6%) 16(43.2%) 11(29.7%) 12(35.3%) 49(34.3%) .54
Tested positive for gonorrhea 6(4.2%) 4(2.7%) 1(0.7%) 2(1.4%) 13(2.2%) .19
Tested positive for Chlamydia 19(13.2%) 22(15.1%) 10( 6.8%) 19(13.0%) 70(12.0%) .14
Tested positive for trichomonas 40(27.8%) 50(34.2%) 57(38.5%) 49(33.6%) 196(33.6%) .28
Tested positive for bacterial vaginosis 60(41.7%) 61(41.8%) 62(41.9%) 45(30.8%) 228(39.0%) .14

*past year; **past month;

*** 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.

**** Numbers associated with the continuous variables represent Medians and Interquartile Ranges.

Vera et al.

Vera et al. BMC Public Health 2012 12:653   doi:10.1186/1471-2458-12-653

Open Data