Table 1.
Recurring sexual partner concurrency among female sex workers and their non-commercial male partners in Tijuana and Cd. Juárez, Mexico (n=428)
| With past- year recurring concurrency (n=68, 16%) |
Without past-year recurring concurrency (n=360, 84%) |
Overall (n=428, 100%) |
FSWs’ Concurrency: Marginal Effect (robust SE) a (n=214) |
Men’s Concurrency: Marginal Effect (robust SE) a (n=214) |
|
|---|---|---|---|---|---|
| Socio-Demographics & Relationship Factors | |||||
| Female (vs. male) | 55 (81%) |
159 (44%) |
214 (50%) |
-- | -- |
| Age in years (median, IQR b) |
33 (28–41) |
35 (29–42) |
35 (29–42) |
-- | -- |
| Educational attainment in years (median, IQR) |
7 (6–9) |
6 (6–9) |
7 (6–9) |
-- | -- |
| Income ≥$250 USD per month |
52 (76%) |
190 (53%) |
242 (57%) |
0.26*** (0.06) |
−0.01 (0.03) |
| Non-commercial relationship duration in years (median, IQR) c |
3 (2–7) |
3 (2–5) |
3 (2–6) |
-- | -- |
| Unprotected vaginal sex acts w/ study partner, past month (median %, IQR) c |
100% (65–100) |
100% (83–100) |
100% (80–100) |
-- | -- |
| Believes study partner has had STIs |
11 (16%) |
22 (6%) |
33 (8%) |
0.09 (0.09) |
0.09** (0.04) |
|
Machismo score (range 10–40; median, IQR) d |
20 (18–22) |
20 (17–23) |
20 (17–23) |
-- | -- |
|
Caballerismo score (range 10–40; median, IQR) d |
30 (20–30) |
30 (28–37) |
30 (28–36) |
−0.01 (0.04) |
0.04** (0.02) |
| Heroin use (past 6 months) |
34 (50%) |
233 (65%) |
267 (62%) |
-- | -- |
| Cocaine use (past 6 months) |
13 (19%) |
72 (20%) |
85 (20%) |
-- | -- |
| Crack use (past 6 months) |
4 (6%) |
55 (15%) |
59 (14%) |
-- | -- |
| Methamphetamine use (past 6 months) |
39 (57%) |
95 (26%) |
134 (31%) |
-- | -- |
| Injected any drugs (past 6 months) |
31 (46%) |
225 (63%) |
256 (60%) |
-- | -- |
a
Marginal effects were calculated from the final, adjusted bivariate probit regression model with robust standard errors (SE) controlling for city and couple-specific effects (Rho statistic indicated significant correlation of error terms within couples, p<.001).
b
Interquartile range.
c
Dyad average (uses information from both partners’ responses within a given couple).
d
Subscale of the Traditional Machismo and Caballerismo Scale.[9]
*
p<.10,
**
p<.05,
***
p<.01.