Variable | Frequency (n = 150) | Percent (%) |
|---|---|---|
Age | Mean (30.63) Std (5.86) Range (30) Min-Max (18–48) | |
Young Adult (18–24) | 21 | 14.0 |
Adult (25+) | 129 | 86.0 |
Gender Identity (n = 150) | ||
Man | 145 | 96.7 |
Transgender | 3 | 2.0 |
Education (n = 150) | ||
Primary or less | 111 | 74.0 |
Secondary or more | 39 | 26.0 |
Marital Status (n = 150) | ||
Unmarried | 97 | 64.7 |
Married | 53 | 35.3 |
Number of Children (n = 150) | ||
No children | 80 | 53.3 |
One or more children | 70 | 46.7 |
Religious Affiliation (n = 150) | ||
No religion | 25 | 16.7 |
Belong to a religion | 125 | 83.3 |
Rank of Religiosity (n = 150) | ||
Not religious | 15 | 10.0 |
Religious | 135 | 90.0 |
Length of Stay in Italy (n = 150) | ||
A year or less | 63 | 42.0 |
More than a year | 87 | 58.0 |
Sexual Orientation (n = 150) | ||
Gay | 106 | 70.7 |
Bisexual | 44 | 29.3 |
Sex Role (n = 150) | ||
Top | 63 | 42.0 |
Bottom | 28 | 18.7 |
Versatile (Verse) | 59 | 39.3 |
Any other job apart from sex work (n = 150) | ||
Yes | 32 | 21.3 |
No | 118 | 78.7 |
| STI/HIV Prevalence and Testing Behaviors | ||
Category | Subcategory | Percentage | Count (n) |
|---|---|---|---|
HIV Testing | Ever Tested | 59.3% | 89 |
HIV Testing | Never Tested | 40.7% | 61 |
HIV Test Results | Negative | 53.9% | 48 |
HIV Test Results | Positive | 46.1% | 41 |
STI Testing | Ever Tested | 70.0% | 105 |
STI Testing | Never Tested | 30.0% | 45 |
HIV Self-Testing | Awareness | 44.7% | 67 |
HIV Self-Testing | Uptake (of those aware) | 47.7% | 32 |
HIV/STI Status | Frequency (n) | Percentages (%) |
|---|---|---|
HIV Positive | 41 | 46.07 |
Syphilis | 14 | 9.33 |
Gonorrhoea | 18 | 12.00 |
Chlamydia | 4 | 2.67 |
Herpes (HSV-1 and HSV-2) | 2 | 1.33 |
Human Papillomavirus (HPV) | 3 | 2.00 |
Hepatitis B | 14 | 9.33 |
Hepatitis C | 6 | 4.00 |
Anal Warts | 8 | 5.33 |
| Bivariate Analysis of Factors Associated with HIV Testing among AMMSWs | ||
Self-reported HIV Testing (n = 150) | |||||
|---|---|---|---|---|---|
Variable | Never Tested (n = 61) | Negative (n = 48) | Positive (n = 41) | χ² | p-value |
Age | 1.80 | 0.408 | |||
Young Adult (18–24) | 8.5 (6) | 6.7 (9) | 5.7 (6) | ||
Adult (25+) | 52.5 (55) | 41.3 (39) | 35.3 (35) | ||
Education | 7.76 | 0.021 | |||
Primary or less | 45.1 (38) | 35.5 (38) | 30.3 (35) | ||
Secondary or more | 15.9 (23) | 12.5 (10) | 10.7 (6) | ||
Marital Status | 15.39 | < 0.001 | |||
Single | 39.4 (29) | 31.0 (40) | 26.5 (28) | ||
Married | 21.6 (32) | 17.0 (8) | 14.5 (13) | ||
Number of Children | 14.89 | 0.001 | |||
No children | 32.5 (21) | 25.6 (31) | 21.9 (28) | ||
One or more children | 28.5 (40) | 22.4 (17) | 19.1 (13) | ||
Religion Affiliation | 1.43 | 0.490 | |||
No religion | 10.2 (10) | 8.0 (6) | 6.8 (3) | ||
Belong to a religion | 50.8 (51) | 40.0 (42) | 34.2 (32) | ||
Length of Stay in Italy | 17.50 | < 0.001 | |||
A year or less | 25.6 (14) | 20.2 (23) | 17.2 (26) | ||
More than a year | 35.4 (47) | 27.8 (25) | 23.8 (15) | ||
Sexual Orientation | 6.65 | 0.036 | |||
Gay | 43.1 (50) | 33.9 (29) | 29.0 (27) | ||
Bisexual | 17.9 (11) | 14.1 (19) | 12.0 (14) | ||
Distance to Healthcare Facility (Km) | 25.73 | < 0.001 | |||
1–5 km | 29.7 (43) | 23.4 (22) | 20.0 (8) | ||
6 km or more | 31.3 (18) | 24.6 (26) | 21.0 (33) | ||
Healthcare frequency | 4.87 | 0.088 | |||
Never | 11.8 (17) | 9.3 (6) | 7.9 (6) | ||
Regular | 49.2 (44) | 38.7 (42) | 33.1 (35) | ||
Health Insurance Status | 27.62 | < 0.001 | |||
Yes | 23.2 (37) | 18.2 (16) | 15.6 (4) | ||
No | 37.8 (24) | 29.8 (32) | 25.4 (37) | ||
Healthcare access challenge (Because of Immigration status) | 11.49 | 0.003 | |||
Yes | 24.8 (16) | 19.5 (28) | 16.7 (17) | ||
No | 36.2 (45) | 28.5 (20) | 24.3 (24) | ||
Experienced stigma/ discrimination at the hospital | 14.26 | 0.001 | |||
Yes | 17.1 (10) | 13.4 (23) | 11.5 (9) | ||
No | 43.9 (51) | 34.6 (25) | 29.5 (32) | ||
Primary source of care when you are sick | 7.32 | 0.026 | |||
Self-medicate | 16.3 (17) | 12.8 (18) | 10.9 (5) | ||
Pharmacy/clinic/Hospital | 44.7 (44) | 35.2 (30) | 30.1 (36) | ||
Do you know where to go for STI/HIV testing and care? | 7.84 | 0.020 | |||
Yes | 37.8 (42) | 29.8 (33) | 25.4 (18) | ||
No | 23.2 (19) | 18.2 (15) | 15.6 (23) | ||
Alcohol Use | 13.09 | 0.001 | |||
Non-users | 49.6 (54) | 39.0 (31) | 33.3 (37) | ||
Users | 11.4 (7) | 9.0 (17) | 7.7 (4) | ||
Illicit drug Use | 8.90 | 0.012 | |||
Non-users | 47.2 (51) | 37.1 (30) | 31.7 (35) | ||
Users | 13.8 (10) | 10.9 (18) | 6.0 (6) | ||
Sex Role | 7.25 | 0.123 | |||
Top | 25.6 (22) | 20.2 (20) | 17.2 (21) | ||
Bottom | 11.4 (12) | 9.0 (13) | 7.7 (3) | ||
Versatile (Verse) | 24.0 (27) | 18.9 (15) | 16.1 (17) | ||
Any other job apart from sex work | 1.50 | 0.472 | |||
Yes | 13.0 (10) | 10.2 (12) | 8.7 (10) | ||
No | 48.0 (51) | 37.8 (36) | 32.3 (31) | ||
Tested for STI | 10.07 | 0.007 | |||
Never tested | 18.3 (27) | 14.4 (9) | 12.3 (9) | ||
Ever tested | 42.7 (34) | 33.6 (39) | 28.7 (32) | ||
Transactional Condom-less sex | 0.55 | 0.759 | |||
Yes | 31.7 (31) | 25.0 (27) | 21.3 (20) | ||
No | 29.3 (30) | 23.0 (21) | 19.7 (21) | ||
Number of clients daily | 3.13 | 0.209 | |||
1–4 | 42.7 (45) | 33.6 (29) | 28.7 (31) | ||
5 or more | 18.3 (16) | 14.4 (19) | 12.3 (10) | ||
Aware of partner's sexual history/STI status before sex | 17.14 | < 0.001 | |||
Yes | 20.7 (32) | 16.3 (13) | 13.9 (6) | ||
No | 40.3 (29) | 31.7 (35) | 27.1 (35) | ||
No. of clients in past 2 months (Men) | 2.71 | 0.258 | |||
Less than 20 | 33.3 (38) | 26.2 (25) | 22.4 (19) | ||
20 or more | 27.7 (23) | 21.8 (23) | 18.6 (22) | ||
| *Values shown as Expected (Observed). χ² = Chi-square statistic. Significant at p-value < 0.05. | |||||
| Bivariate Analysis of Factors Associated with HIV Prevalence among AMMSWs | |||||
Self-reported HIV Status (n = 89) | ||||
|---|---|---|---|---|
Variable | Negative (n = 48) | Positive (n = 41) | χ² | p-value |
Age | 0.27 | 0.605 | ||
Young Adult (18–24) | 8.1 (9) | 6.9 (6) | ||
Adult (25+) | 39.9 (39) | 34.1 (35) | ||
Education | 0.58 | 0.448 | ||
Primary or less | 39.4 (38) | 33.6 (35) | ||
Secondary or more | 8.6 (10) | 7.4 (6) | ||
Marital Status | 2.77 | 0.096 | ||
Unmarried | 36.7 (40) | 31.3 (28) | ||
Married | 11.3 (8) | 9.7 (13) | ||
Number of Children | 0.14 | 0.712 | ||
No children | 31.8 (31) | 27.2 (28) | ||
One or more children | 16.2 (17) | 13.8 (13) | ||
Religion Affiliation | 1.41 | 0.235 | ||
No religion | 8.1 (6) | 6.9 (9) | ||
Belong to a religion | 39.9 (42) | 34.1 (32) | ||
Length of Stay in Italy | 2.15 | 0.143 | ||
A year or less | 26.4 (23) | 22.6 (26) | ||
More than a year | 21.6 (25) | 18.4 (15) | ||
Sexual Orientation | 0.28 | 0.597 | ||
Gay | 30.2 (29) | 25.8 (27) | ||
Bisexual | 17.8 (19) | 15.2 (14) | ||
Distance to Healthcare Facility (Km) | 6.86 | 0.009 | ||
1–5 km | 16.2 (22) | 13.8 (8) | ||
6 km or more | 31.8 (26) | 27.2 (33) | ||
Healthcare frequency | 0.09 | 0.769 | ||
Never | 6.5 (6) | 5.5 (6) | ||
Regular | 41.5 (42) | 35.5 (35) | ||
Health Insurance Status | 7.06 | 0.008 | ||
Yes | 10.8 (16) | 9.2 (4) | ||
No | 37.2 (32) | 31.8 (37) | ||
Healthcare access challenge (Immigration status) | 2.52 | 0.113 | ||
Yes | 24.3 (28) | 20.7 (17) | ||
No | 23.7 (20) | 20.3 (24) | ||
Experienced stigma or discrimination at the hospital | 6.47 | 0.011 | ||
Yes | 17.3 (23) | 14.7 (9) | ||
No | 30.7 (25) | 26.3 (32) | ||
Primary source of care when you are sick | 7.39 | 0.007 | ||
Self-medicate | 12.4 (18) | 10.6 (5) | ||
Pharmacy/clinic/Hospital | 35.6 (30) | 30.4 (36) | ||
Do you know where to go for STI/HIV testing and care? | 5.58 | 0.018 | ||
Yes | 27.5 (33) | 23.5 (18) | ||
No | 20.5 (15) | 17.5 (23) | ||
Alcohol Use | 8.08 | 0.004 | ||
Non-users | 36.7 (31) | 31.3 (37) | ||
Users | 11.3 (17) | 9.7 (4) | ||
Illicit drug Use | 5.87 | 0.015 | ||
Non-users | 35.1 (30) | 29.9 (35) | ||
Users | 12.9 (18) | 11.1 (6) | ||
Sex Role | 5.89 | 0.053 | ||
Top | 22.1 (20) | 18.9 (21) | ||
Bottom | 8.6 (13) | 7.4 (3) | ||
Versatile (Verse) | 17.3 (15) | 14.7 (17) | ||
Any other job apart from sex work | 0.01 | 0.947 | ||
Yes | 11.9 (12) | 10.1 (10) | ||
No | 36.1 (36) | 30.9 (31) | ||
Tested for STI | 0.14 | 0.708 | ||
Never tested | 9.7 (9) | 8.3 (9) | ||
Ever tested | 38.3 (39) | 32.7 (32) | ||
Transactional Condom-less sex | 0.50 | 0.482 | ||
Yes | 25.3 (27) | 21.7 (20) | ||
No | 22.7 (21) | 19.3 (21) | ||
Number of clients daily | 2.32 | 0.127 | ||
1–4 | 32.4 (29) | 27.6 (31) | ||
5 or more | 15.6 (19) | 13.4 (10) | ||
Aware of partner's sexual history/STI status before sex | 2.04 | 0.153 | ||
Yes | 10.2 (13) | 8.8 (6) | ||
No | 37.8 (35) | 32.2 (35) | ||
No. of clients in past 2 months (Men) | 0.29 | 0.589 | ||
Less than 20 | 23.7 (25) | 20.3 (19) | ||
20 or more | 24.3 (23) | 20.7 (22) | ||
| *Values shown as Expected (Observed). χ² = Chi-square statistic. Significant at p-value < 0.05. | ||||
| Multivariable Analysis (Firth Logistic Regression) for HIV Prevalence among AMMSWs | ||||
| A multivariable Firth logistic regression model was fitted to identify predictors of testing HIV negative among participants. The outcome variable was coded as 1 = tested negative and 0 = tested positive. Table 6 presents adjusted odds ratios (AORs), 95% confidence intervals (CIs), and p-values for each predictor. | ||||
Variable | AOR | 95% CI | p-value |
|---|---|---|---|
Distance to healthcare facility (Farther ≥ 6 km) | 0.41 | 0.15–1.10 | 0.076 |
Has health insurance (Yes) | 1.57 | 0.42–6.38 | 0.503 |
Experienced stigma or discrimination (Yes) | 2.01 | 0.68–6.23 | 0.210 |
Primary source of care: Self-medicate | 3.84 | 1.26–13.46 | 0.017 |
Aware of HIV/STI services (Yes) | 0.84 | 0.29–2.45 | 0.747 |
Alcohol use (Yes) | 0.49 | 0.11–1.94 | 0.305 |
Illicit drug use (Yes) | 1.73 | 0.40–8.38 | 0.468 |
Willing to use HIV services (Yes) | 2.62 | 0.88–8.09 | 0.083 |
| With “tested negative” as the reference outcome (1 = negative, 0 = positive): | |||
| • Participants whose primary source of care was self-medication had significantly higher odds of being HIV negative (AOR = 3.84, 95% CI: 1.26–13.46, p = 0.017), indicating a protective association. | |||
| • Participants who were willing to use HIV services (AOR = 2.62, p = 0.083) and those who experienced stigma or discrimination (AOR = 2.01, p = 0.210) also had higher odds of being HIV negative, though not statistically significant. | |||
| • Conversely, living farther (≥ 6 km) from a healthcare facility was associated with lower odds of being HIV negative (AOR = 0.41, p = 0.076), suggesting higher vulnerability to HIV positivity. | |||
| • No significant associations were observed for health insurance, awareness of HIV/STI services, alcohol use, or illicit drug use. | |||
| Factors Associated with STI Prevalence Among Male Sex Workers in Italy | |||
| The bivariate analysis examined associations between various sociodemographic, behavioral, and healthcare-related factors and the prevalence of sexually transmitted infections (STIs) among 150 male sex workers (MSWs) in Italy. Table 7 summarizes the results. | |||
| Several variables demonstrated statistically significant associations with STI status: Marital Status (χ² = 8.36, p = 0.004, number of children (χ² = 4.02, p = 0.045), length of stay in Italy ((χ² = 3.80, p = 0.051), sexual orientation (χ² = 7.10, p = 0.008), healthcare access challenges due to immigration status (χ² = 4.83, p = 0.028), knowledge of where to go for STI/HIV testing and care (χ² = 5.13, p = 0.023), history of STI testing (χ² = 9.75, p = 0.002), transactional condom-less sex (χ² = 6.66, p = 0.010), awareness of partners' sexual history and sti status before sex (χ² = 5.32, p = 0.021), awareness of prep (χ² = 13.57, p < 0.001). | |||
| In contrast, several variables did not show statistically significant associations with STI prevalence. These include age, education level, religious affiliation, length of stay in Italy, distance to healthcare facility, healthcare frequency, health insurance status, experience of stigma at healthcare facilities, primary source of care, alcohol use, illicit drug use, sex role, engagement in other jobs, awareness and willingness to use HIV self-testing kits, Number of clients daily or over the past two months, ever use and willingness to use PrEP, and healthcare-seeking behaviors. | |||
STI Status (n = 142) | ||||
|---|---|---|---|---|
Variable | Negative (n = 91) | Positive (n = 51) | χ² | p-value |
Age | 0.52 | 0.473 | ||
Young Adult (18–24) | 13.9 (12) | 7.5 (9) | ||
Adult (25+) | 77.5 (79) | 43.5 (42) | ||
Education | 2.47 | 0.116 | ||
Primary or less | 66.0 (62) | 37.0 (41) | ||
Secondary or more | 25.0 (29) | 14.0 (10) | ||
Marital Status | 9.20 | 0.002 | ||
Unmarried | 58.3 (50) | 32.7 (41) | ||
Married | 32.7 (41) | 18.3 (10) | ||
Number of Children | 4.00 | 0.045 | ||
No children | 48.7 (43) | 27.3 (33) | ||
One or more children | 42.3 (48) | 23.7 (18) | ||
Religion Affiliation | 3.34 | 0.068 | ||
No religion | 16.0 (20) | 9.0 (5) | ||
Belong to a religion | 75.0 (71) | 42.0 (46) | ||
Length of Stay in Italy | 4.25 | 0.039 | ||
A year or less | 37.8 (32) | 21.2 (27) | ||
More than a year | 53.2 (59) | 29.8 (24) | ||
Sexual Orientation | 8.81 | 0.003 | ||
Gay | 65.4 (73) | 36.6 (29) | ||
Bisexual | 25.6 (18) | 14.4 (22) | ||
Distance to Healthcare Facility (Km) | 0.81 | 0.367 | ||
1–5 km | 43.6 (41) | 24.4 (27) | ||
6 km or more | 47.4 (50) | 26.6 (24) | ||
Healthcare frequency | 2.20 | 0.138 | ||
Never | 18.6 (22) | 10.4 (7) | ||
Regular | 72.4 (69) | 40.6 (44) | ||
Health Insurance Status | 0.88 | 0.348 | ||
Yes | 34.6 (32) | 19.4 (22) | ||
No | 56.4 (59) | 31.6 (29) | ||
Healthcare access challenge (because of Immigration status) | 6.77 | 0.009 | ||
Yes | 35.2 (28) | 19.8 (27) | ||
No | 55.8 (63) | 31.2 (24) | ||
Experienced stigma/discrimination at hospital | 1.60 | 0.206 | ||
Yes | 26.3 (23) | 14.7 (18) | ||
No | 64.7 (68) | 36.3 (33) | ||
Primary source of care | 3.37 | 0.066 | ||
Self-medicate | 24.4 (29) | 13.6 (9) | ||
Pharmacy/Clinic/Hospital | 66.6 (62) | 37.4 (42) | ||
Knowledge of STI/HIV testing and care | 4.76 | 0.029 | ||
Yes | 57.0 (51) | 32.0 (38) | ||
No | 34.0 (40) | 19.0 (13) | ||
Alcohol Use | 0.40 | 0.561 | ||
Non-users | 73.7 (75) | 41.3 (40) | ||
Users | 17.3 (16) | 9.7 (11) | ||
Illicit drug Use | 3.01 | 0.083 | ||
Non-users | 73.1 (77) | 40.9 (37) | ||
Users | 17.9 (14) | 10.1 (14) | ||
Sex Role | 1.12 | 0.571 | ||
Top | 38.5 (40) | 21.5 (20) | ||
Bottom | 16.7 (18) | 9.3 (8) | ||
Versatile | 35.9 (33) | 20.1 (23) | ||
Tested for STI | 11.86 | 0.001 | ||
Never tested | 28.8 (38) | 16.2 (7) | ||
Ever tested | 62.2 (53) | 34.8 (44) | ||
Transactional Condom-less sex | 6.75 | 0.009 | ||
Yes | 47.4 (40) | 26.6 (34) | ||
No | 43.6 (51) | 24.4 (17) | ||
Number of clients daily | 0.54 | 0.463 | ||
1–4 | 64.1 (66) | 35.9 (34) | ||
5 or more | 26.9 (25) | 15.1 (17) | ||
Aware of partner's sexual history/STI status | 5.32 | 0.021 | ||
Yes | 30.8 (37) | 17.2 (11) | ||
No | 60.2 (54) | 33.8 (40) | ||
No. of clients in past 2 months (Men) | 0.05 | 0.818 | ||
Less than 20 | 49.3 (50) | 27.7 (27) | ||
20 or more | 41.7 (41) | 23.3 (24) | ||
| *Values shown as Expected (Observed). χ² = Chi-square statistic. Significant at p-value < 0.05. | ||||
| Multivariate analysis (Firth Logistic Regression) for STI Testing Outcome | ||||
| A multivariable Firth’s penalized logistic regression model was used to identify factors associated with testing STI negative among participants. The outcome variable was coded as 1 = tested STI negative and 0 = tested STI positive. Table 8 presents adjusted odds ratios (AORs), 95% confidence intervals (CIs), and p-values for each predictor. | ||||
Variable | AOR | 95% CI | p-value |
|---|---|---|---|
Marital status (Single) | 0.64 | 0.25–1.61 | 0.338 |
Number of children (One or more) | 0.93 | 0.37–2.29 | 0.879 |
Length of stay in Italy (More than 1 year) | 1.46 | 0.63–3.39 | 0.372 |
Sexual orientation (Gay) | 2.50 | 1.08–5.94 | 0.033 |
Immigration-related healthcare challenge (Yes) | 0.48 | 0.21–1.06 | 0.071 |
Awareness of HIV/STI services (Yes) | 2.29 | 0.93–5.99 | 0.072 |
Condom use during anal sex (Yes) | 0.80 | 0.26–2.35 | 0.686 |
Aware of partner’s STI history (Yes) | 2.09 | 0.82–5.51 | 0.123 |
| Participants who identified as gay had significantly higher odds of testing STI negative compared to those identifying as bisexual (AOR = 2.50, 95% CI: 1.08–5.94, p = 0.033). | |||
| Although not statistically significant, greater odds of testing negative were also observed among those who were aware of HIV/STI services (AOR = 2.29, p = 0.072) and those aware | |||
| of their partner’s STI history (AOR = 2.09, p = 0.123). | |||
| Conversely, participants reporting immigration-related challenges had lower odds of testing STI negative (AOR = 0.48, p = 0.071), indicating potential increased vulnerability to STI positivity. No significant associations were found for marital status, number of children, length of stay in Italy, or condom use. | |||
| These bias-reduced estimates refine the bivariate results, revealing that structural and behavioral factors jointly influence HIV and STI outcomes among African migrant male sex workers in Italy. | |||
| Discussion | |||
| Conceptually informed by the structural vulnerability framework, but not analytically modeled as such, this study interprets the interlinkages between HIV/STI outcomes and structural vulnerabilities through a theoretical lens rather than a formal statistical framework. The coexistence of infectious diseases, stigma, and limited healthcare access exemplifies a process shaped by social determinants of health, in which structural and behavioral conditions interact to magnify risk. Quantitative evidence, such as the association between lack of insurance and HIV positivity, illustrates the structural determinants underlying the observed health inequities, while behavioral factors (e.g., substance use, condomless sex) reflect reinforcing mechanisms that sustain disease clustering. | |||
| This study also offers one of the first comprehensive epidemiologic profiles of HIV and STI prevalence among AMMSWs in Italy, highlighting a structurally-driven health burden shaped by structural, behavioral, and sociocultural vulnerabilities, with nearly half (46.07%) of participants who had ever tested for HIV self-reporting a positive status, substantially higher than Italy's national average of < 1%. These findings underscore an urgent public health crisis that has been largely invisible in European surveillance data 46,66,67. | |||
| Our findings align with broader regional and global literature identifying male sex workers, particularly those who are migrants, as a critically underserved and highly vulnerable key population for HIV and other STIs68–70. The intersection of migration status, engagement in sex work, and minoritized sexual orientation converge to amplify health risks and restrict access to prevention and care services60,71,72. This study empirically demonstrates how these intersectional disadvantages materialize in heightened disease prevalence and constrained healthcare access; a trend echoed in cross-European analyses. | |||
| Health system-related barriers emerged as significant correlates of HIV positivity. Participants without health insurance, those living more than six kilometers from a health facility, and those who reported immigration-related healthcare access challenges were significantly more likely to report HIV infection. These findings confirm prior evidence that spatial and financial barriers compromise timely HIV testing, diagnosis, and care engagement, particularly among migrant and undocumented populations73–75. | |||
| Further, experiences of stigma and discrimination within healthcare settings were associated with higher HIV prevalence. This finding corroborates robust evidence from European and global studies showing that enacted and anticipated stigma suppresses health-seeking behaviors and delays diagnosis and treatment 76–78 Stigma undermines individual engagement with health services and perpetuates population-level transmission by impeding prevention cascades77,79,80. | |||
| Interestingly, frequent engagement with formal healthcare services, typically considered a protective factor, was associated with HIV positivity. This finding likely reflects reverse causality, whereby individuals diagnosed with HIV are more routinely engaged in care for ART monitoring and comorbidity management81,82. These findings highlight the need to distinguish between antecedent risk factors and post-diagnosis behaviors when interpreting healthcare utilization data in cross-sectional analyses. | |||
| Behavioral correlates, including substance use, further compounded the risk. Consistent with prior studies83,84 both alcohol and illicit drug use were positively associated with HIV prevalence. Substance use has been linked to impaired judgment, reduced condom use, and engagement in high-risk transactional sex85,86. The high co-occurrence of these risk factors reinforces the need for integrated harm reduction and HIV prevention programming tailored to the lived realities of AMMSWs. | |||
| Moreover, a lack of awareness about where to access HIV/STI testing and care was significantly associated with HIV positivity, suggesting that informational barriers are as consequential as structural ones. This finding aligns with European research highlighting the importance of health literacy and service awareness for timely testing and prevention87,88. Public health interventions must, therefore, prioritize culturally and linguistically accessible communication strategies to raise awareness and normalize care-seeking among migrant sex workers. | |||
| Beyond HIV, this study revealed high burdens of rectal gonorrhea (12%), syphilis (9.33%), and hepatitis B (9.33%), with several structural and behavioral factors shaping STI risk. Notably, STI positivity was significantly higher among participants reporting condomless transactional sex, aligning with prior findings that financial pressures and client coercion often override safer sex intentions among sex workers89,90. | |||
| Marital and parental status also emerged as significant correlates of STI prevalence. Unmarried individuals and those without children exhibited higher STI rates, suggesting that social connectedness and perceived responsibility may exert a protective effect. This finding is consistent with the broader literature on protective social structures among migrant populations91–93 Similarly, bisexual men had disproportionately high STI prevalence, a pattern also observed in prior research likely due to dual stigma, lower healthcare engagement, and limited inclusion in MSM- or heterosexual-specific interventions. | |||
| The recency of migration also predicted the STI burden. Individuals who had resided in Italy for less than one year were significantly more likely to report an STI, echoing findings from other European studies indicating that recent migrants face intensified barriers to healthcare due to legal, linguistic, and economic constraints72,94 These data stress the importance of early and targeted outreach to newly arrived migrants engaged in sex work. | |||
| Interestingly, participants who had never tested for STIs were less likely to report infection, though this likely reflects underdiagnosis rather than actual absence of disease. Diagnostic bias is a well-documented challenge in epidemiologic studies, particularly among hard-to-reach and under-tested populations95,96. The high observed prevalence among testers underscores the critical need for expanded routine screening to improve case identification and linkage to care. | |||
| Lack of knowledge about sexual partners' STI history also correlated with higher STI prevalence, reinforcing existing evidence that limited partner communication in transactional encounters increases transmission risk97–99. Interventions must consider strategies to promote safer sex negotiation, even within the constrained agency contexts that characterize much of sex work. | |||
| Collectively, these findings expose glaring gaps in Italy's current HIV/STI prevention architecture for AMMSWs and other migrant sex workers. There is an urgent need for multilevel, culturally responsive, and community-driven interventions. Mobile clinics, peer-led testing initiatives, and digital platforms offering confidential information and appointment scheduling can mitigate geographic and structural barriers. Legal and policy reforms, including decriminalization of sex work and guarantees of healthcare access for undocumented migrants are necessary to dismantle the structural violence embedded in current systems. Expansion of PrEP access, HIV self-testing distribution, and structural determinants informed screening (e.g., combined HIV/STI/HBV testing) through trusted community organizations may significantly reduce new infections in this population. | |||
| Limitations | |||
| While the structural vulnerability framework provides a valuable approach for interpreting the interrelated health and social phenomena observed in this study, the cross-sectional design restricts the ability to assess temporal or causal relationships among variables. The associations identified between structural vulnerabilities and HIV/STI outcomes should therefore be interpreted as correlational rather than causal. Future longitudinal or mixed-methods research could better capture how changes in migration status, healthcare access, or social stigma influence structurally-driven health dynamics over time. | |||
| Additionally, the social determinants of health framework was applied conceptually rather than analytically; thus, the findings illustrate patterns consistent with socially and structurally-driven health processes but do not statistically test for interaction effects among health and social variables. The framework guided the study's conceptual framing, variable selection, and interpretation of overlapping vulnerabilities, but no formal modeling indices or analytic interaction terms were conducted. This theoretical application provides valuable insights into how social and structural inequities interact with health outcomes, even without formal statistical modeling of these interactions. | |||
| Reliance on self-reported data for sensitive behaviors such as condom use, substance use, and HIV/STI status introduces potential recall and social desirability biases, which may have led to underreporting or misclassification of risk exposures. Although purposive and respondent-driven sampling was appropriate for reaching a hidden and stigmatized population, the resulting sample may not fully represent all AMMSWs in Italy, particularly those operating outside urban centers or unaffiliated with community-based organizations. | |||
| Moreover, the exclusion of non-English and non-Italian speakers and the focus on cisgender male participants may limit the generalizability of findings to transgender, non-binary, or linguistically isolated subgroups. Finally, the absence of biomarker verification prevented confirmation of self-reported HIV/STI results, potentially affecting prevalence estimates. | |||
| Despite these limitations, the study provides a rare and critical epidemiological perspective on a severely understudied population. It quantifies the structurally-driven health burden among AMMSWs and lays the groundwork for future longitudinal and intervention studies aimed at dismantling the structural inequities that sustain overlapping epidemics of infection, stigma, and exclusion. | |||
| Conclusion | |||
| Guided by the structural vulnerability framework, this study demonstrates that the HIV and STI burden among AMMSWs in Italy extends far beyond biomedical vulnerability. It reflects the convergence of social, behavioral, and structural determinants that reinforce one another within contexts of exclusion and precarity. | |||
| In this study, the social determinants of health were considered as complementary contextual factors shaping exposure and access. The framework provided a lens for interpreting how intersecting structural factors, such as stigma, legal precarity, migration-related barriers, and limited healthcare access, compound HIV and STI risk. However, no formal statistical modeling or syndemic interaction terms were applied. Thus, while the findings reveal patterns consistent with structurally-driven health processes, they do not constitute empirical tests of interactions among social determinants of health. Instead, the study contributes a conceptual and descriptive understanding of how overlapping vulnerabilities shape health disparities within this marginalized population. | |||
| The findings provide critical epidemiological evidence on a population that remains largely invisible in national surveillance systems and underserved by public health programming. The alarmingly high prevalence of HIV and other STIs, particularly syphilis, rectal gonorrhea, and hepatitis B, illustrates a landscape shaped by the structural and social determinants of health, with overlapping behavioral, structural, and sociopolitical vulnerabilities. Structural barriers such as lack of health insurance, geographic inaccessibility, and immigration-related restrictions were strongly associated with infection, underscoring the importance of addressing the broader social determinants of health. Behavioral factors, including substance use and condomless transactional sex, further compounded individual-level risk, while informational inequities limited knowledge of testing sites and partners’ sexual health, exacerbating vulnerability. These behavioral patterns operate within the broader structural vulnerabilities described above, reflecting how individual choices are constrained by systemic barriers. | |||
| Collectively, these findings highlight the need for public health strategies that move beyond disease-specific and biomedical models. Effective responses must be community-informed, rights-based, and intersectional, integrating prevention, care, and structural reform. Expanding access to HIV self-testing, pre-exposure prophylaxis (PrEP), and screening informed by the structural vulnerability framework through peer-led networks, mobile outreach, and culturally competent providers is essential. Equally important are legal and policy reforms that decriminalize sex work, safeguard migrant rights, and combat stigma within healthcare systems. | |||
| By centering the lived realities of AMMSWs, this study contributes to a growing body of evidence calling for equity-driven, justice-oriented approaches to HIV and STI prevention. Targeted investment in this key population is both a public health imperative and a matter of human rights. Future research should build upon this foundation through longitudinal and intervention studies that operationalize the social determinants of health framework analytically, testing the interaction effects of co-occurring social, structural, and health conditions to develop scalable, sustainable, and dignified solutions for one of Europe’s most marginalized communities. | |||
| Contributions | |||
| Conceptualization (GRA, DC, LN), methodology (GRA, DC), investigation (GRA, OWS, HDD, SSN), formal analysis (OWS, HDD, SN), data curation (HDD, SSN, MS), visualization (SSN, HDD), project administration (OWS, GRA), funding acquisition (GRA, LN), writing – original draft (OWS, HDD), writing – review & editing (OWS, SN, HDD, MS, GRA, LN, DC), supervision (GRA). | |||