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Horizonte sanitario

versión On-line ISSN 2007-7459versión impresa ISSN 1665-3262

Horiz. sanitario vol.22 no.2 Villahermosa may./ago. 2023  Epub 29-Ene-2024

https://doi.org/10.19136/hs.a22n2.5283 

Original articles

Social determinants and sexual risk behaviors within Immunodeficiency Virus cases in Solidaridad, Quintana Roo, México

Determinantes sociales y conductas sexuales de riesgo en casos de Virus de la Inmunodeficiencia en Solidaridad, Quintana Roo, México

Gabriel Chavira-Trujillo1 
http://orcid.org/0000-0001-9918-1822

Leonardo Llamas-Ramos2 
http://orcid.org/0000-0001-7112-8245

Aida Jiménez Corona3 
http://orcid.org/0000-0002-1614-9390

Rudolf Geers4 
http://orcid.org/0000-0003-2739-2035

Antonio Reyna Sevilla5 
http://orcid.org/0000-0001-7842-0388

Gabriela Alejandra Grover Baltazar6 
http://orcid.org/0000-0002-2100-2879

María Eugenia Jiménez Corona7  * 
http://orcid.org/0000-0002-3804-9761

1PhD, Department of Epidemiology of the National Institute of Cardiology "Ignacio Chávez", Mexico City, Mexico.

2MD, Physician into the physical and mental health department H. Ayuntamiento de Solidaridad Quintana Roo, México

3PhD, Conde de Valenciana Institute of Ophthalmology IAP, Deputy General Directorate of Epidemiology, Health Secretariat, Mexico City, Mexico.

4Positive Life Playa A.C., Playa del Carmen. Quintana Roo. Mexico.

5PhD, Directorate of Medical Benefits, IMSS, Mexico City, Mexico

6PhD, University Center for Health Sciences, University of Guadalajara, Guadalajara, Jalisco, Mexico.

7PhD, Department of Epidemiology of the National Institute of Cardiology "Ignacio Chávez", Mexico City, Mexico.


Abstract

Objective:

To determine the prevalence of HIV in individuals by analyzing the influence of social determinants and sexual risk behaviors, in order to estimate the crude and adjusted risks of being HIV positive in the municipality of Solidaridad, state of Quintana Roo, Mexico.

Method and Materials:

A cross-sectional study was conducted in the municipality of Solidaridad, Quintana Roo, Mexico. Third and fourth generation HIV rapid tests were performed. Descriptive statistics, measures of association (OR and 95 % CI) and p value were calculated for each stratum. Logistic regression models were performed to determine the risk factors associated with being HIV positive in the tests.

Results:

The sample consisted of 4,800 people, of whom 3,030 were men (63.12%); the mean age was 32.6 years (SD 14.96). The variables included in the multivariate model for being HIV positive are: men who have sex with men with OR=61.20, age 30-39 years OR=1.72, having anal sex OR=2.21, and as a protective factor having health service OR =0.42. Conclusions: This study confirms already known social determinants such as being male and being in economically active age and sexual practices such as: having anal sex and men with men. Being entitled to health services was shown to be the only protective factor.

Keywords: Epidemiologic Factors; Sexuality; HIV; Epidemiology

Resumen

Objetivo:

Determinar la prevalencia de VIH en personas analizando la influencia de los determinantes sociales y las conductas sexuales de riesgo, para estimar los riesgos crudos y ajustados para ser VIH positivo en el municipio Solidaridad, estado de Quintana Roo, México.

Método y Materiales:

Se realizó un estudio transversal en el municipio de Solidaridad, Quintana Roo, México. Se realizaron pruebas rápidas de VIH de tercera y cuarta generación. Se calcularon las estadísticas descriptivas, las medidas de asociación (OR e IC del 95 %) y el valor de p para cada estrato. Se realizaron modelos de regresión logística para determinar los factores de riesgo asociados con ser VIH positivo en las pruebas.

Resultados:

La muestra estuvo compuesta por 4,800 personas de las cuales; 3,030 hombres (63.12%); la edad promedio fue de 32.6 años (D.E. 14.96). Las variables incluidas en el modelo multivariado para ser VIH positivo son: hombres que tienen sexo con hombres con OR=61.20, edad 30-39 años OR=1.72, tener sexo anal OR=2.21, y como factor protector contar con servicio de salud OR =0.42.

Conclusiones:

Este estudio confirma determinantes sociales ya conocidos como el ser hombre y estar en edad económicamente activa y prácticas sexuales como: el tener sexo anal y hombres con hombres. Contar con derechohabiencia se muestra como único factor protector.

Palabras clave: Factores Epidemiológicos; Sexualidad; VIH; Epidemiología

Introduction

The Acquired Human Immunodeficiency Virus (HIV) is still considered one of the main public health problems, it has caused 36 million deaths by 2021 according to the World Health Organization (WHO). Just in 2016, it has claimed a million lives associated with it. Although the incidence of HIV infections has decreased by 35% and the deaths related to Acquired Immune Deficiency Syndrome (AIDS) by 41%, there is still a big challenge ahead. Advances get us closer to the goal of the sixth Millennium Development Goal (MDG). however, still pleanty work to do Testing and the use of antiretrovirals are slowing the spread of HIV as they are the most effective strategies across countries. As published in July 2015 by the Joint United Nations Program on HIV/AIDS (UN/AIDS)1. Also, decreasing HIV infection is considered in the Sustainable Development Goals (ODS, for Spanish abbreviation): Third-“Good Health and Well-Being” and Fifth-“Gender Equality”.

AIDS represents a disease caused by two lentiviruses: Human Immunodeficiency Virus type 1 (HIV-1) and type 2 (HIV-2). The patterns of dissemination of HIV-1 and HIV-2 are not the same across the world population, a decreasing in serotype two has been observed, meanwhile, the incidence of serotype one has continued to increase2. Starting in the 1980s HIV has a progressive spread of the disease, giving rise to a pandemic that everyone witnessed and suffered. About 40 million people have been infected with HIV, of which about two-thirds live in sub-Saharan Africa. This pandemic has continuously generated different kind of movements in society; since 1970s HIV is involved in mass migration, poverty, civil wars, and sexual promiscuity3.

The prevalence of HIV infection in the world is still spreading according to datacenter reported by the WHO world regions estimates these rates for the main regions in the world: in Sub-Saharan Africa of the Sahara is 8.8%, in North Africa and the Middle East it is 0.2%, in South and Southeast Asia 0.56%, in East Asia and the Pacific 0.07%, Eastern Europe and Central Asia 0.35%, Western Europe 0.24%, Australia and New Zealand 0.13%, in the Caribbean 2.3%, North America 0.6% and, Latin America 0.5%4. Epidemiological surveillance in Mexico, estimates for 2017 an HIV prevalence of 0.3%, which implies that 3 out of every thousand people live with this disease. Having more than 3.7 million of peopeis an alarming data due to the number of infections. According to data published by the United Nation-AIDS report, a higher prevalence in populations with specific characteristics such as men who have sex with men (MSM) (17.3%); intravenous drug users (5.8%); female commercial sex workers (0.7%),male commercial sex workers (24.1%) and trans- women (15-20%)5. Although there are several studies that determine the prevalence of HIV, a little consider territorial disaggregation or internal migrattion (i.e. Country, State, Federal Entity,Department, Municipality, Census Unit) and rarely, places with high mobility of workers due to temporal labors.

Quintana Roo, has 1. 8 million habitants who represent 1.5 % of the total Mexican population6, however, there is a special context, since is a touristic place and has a lot of migration during the year including workers. Most of the commercial activity is centred on tourism and there are several turistical places around such as: Tulum, Isla Mujeres, Cozumel and Bacalar, however, most of them are expensive places to live. The main cities in Quintana Roo are Benito Juarez (743, 626), Othón P. Blanco (224,080) and Solidaridad (209,634). The Mexican government estimates that Quintana Roo has more than 1.3 million people in the final three months of the Year with 490,014 national visitors and 814,406 international visitors7. Expand epidemiological surveillance is necessary to understand the HIV profile and mobility of these population. At the same time, some studies points the sexual behaviours as one of the main risk factors for the transmission of HIV and other illneses, viruses, bacteria or protozoa such as lymphogranuloma venereum and syphilis. Conduct behaviours such as: sexual promiscuity and having intercourse without a condom are the main identified risk practices and also, the most prevalent8,9. The highest incidence of HIV and other sexually transmitted diseases are observed mainly in medium-sized and developing countries, except those of which has interventions to limit promiscuity or to promote safe sexual practices8. Another key factor is the access to health services since, without it, patients would not be able to get an early diagnosis and proper treatment for HIV infection with antiretroviral treatment10.

In this context, HIV test surveillance plays an important role in the control and management of infections. Epidemiological surveillance has identified that there is an underestimation in HIV rates in general, mainly due to underreporting or underidenfication of cases. Additionally, Panamerican Health Organization (OPS,for Spanish abbreviation) decribes than the main identified causes for achieving a successful epidemic database are: (a) person provides information consistent with the symptoms presented, (b) people have space for complaints (feedback),(c) people seek preventive care (promotion), (d) to have a presumptive diagnosis (identification), and a prompt confirmation (detection)11.

In this sense, one of the objectives of this study were: to determine the prevalence of HIV in adults of 12-60 years stratified by some social determinants and sexual behaviors, to accomplish a region characterization.

Also, make an estimation of the odds and odds ratios for the significant variables, in the city of Solidaridad in the state of Quintana Roo, México.

Materials and Methods

Study design

A descriptive cross-sectional study was carried out in the city of Solidaridad, Quintana Roo, Mexico. The applied questionnaire has an informed consent, socio-demographic questionnaire with gender, sexual preference, age, employment, schooling, legal status, indigenous origin, and native language. Questions related to sexual behaviours were also included, such as the use of condoms, the practice of anal sex, and if people pay or charge for sex or if they were victims of rape. The data validation was carried out through a double capture and rectification of emptying by a social service intern. The questionary includes a control question for VIH-Positive previous results, if they say “Yes” the test still continue, but it was exclude for this study.

Rapid tests for HIV

Third-generation HIV rapid tests (Insti) were used for the general public. This test has a documented sensitivity and specificity of 99.9%. In cases with high-risk conditions identificated (i.e. MSM, unprotected sex with an individual known to be HIV positive, unprotected sex with sex workers), fourth-generation HIV rapid tests were carried out (Avance Quality in collaboration with the Ministry of Health of the State). One of the advantagesof these 4th generation rapid tests is the detection of p24 antigen and/or HIV antibodies, shortening the window period for detection, also, has sensitivity and specificity of 99.9%. The presence of the p24 antigen will indicate an early HIV infection12.

Space-time delimitation and information collection.

The information collection was carried out in the period from January to October 2018, to open population (Some stands out close to health facilities, some in hotels, and in main streets), regardless of whether or not had affiliation to a social security institution. The participants were interviewed in the waiting room for the test application and results. Participation was voluntary and coordinated by a civil association, which was also doing the rapid tests free of charge and without being conditioned to participate in the study.

Ethics and consent

The work was carried out under the code of ethics of the WHO, Declaration of Helsinki and follows the recommendations for the realization, registration, editing and publication of scientific works of the International Committee of Medical Journal Editors (ICMJE). The research is considered with minimal risk and all participants signed informed consent. In the case of minors, they had to bring a relative who signs the consent for the application of the test. No personal data were used in the database, instead, an ”Id” was established for internal control purposes, taking care of the anonymity of the information. The data is expressed as encrypted data, preserving the confidentiality of each of the cases.

Statistical analysis.

Stratified prevalence was calculated. Comparisons of the main sociodemographic variables were made between the subjects who tested positive vs. negative for HIV. The calculation of the differences was made through the prevalence ratio using the chi2 and homogeneity test that considers the probability in the linear trend of the logarithm13.

The risks (OR) were calculated using logistic regression models considering each social determinant, identifying according to statistical significance and/or biological plausibility, considering the explanation of the variance for HIV-positive cases. The adjusted models considered the significant conditions of the previous modelling, removing those that could present bias (i.e. Anal Sex with men who have sex with other men). The odds ratio was calculated at a significance level of p < 0.05 and the 95% confidence interval (95% CI). All analyzes were performed using the STATA/MP 16 program (Stata Corporation, College Station, TX, USA).

Results

Characteristics of the study population.

The sample included 4,800 people, 3,030 men (63.12%) and 1,770 women (36.88%); the average age in the sample was 32.6 years with a standard deviation of 14.96, (minimum age : 12, maximum age:60). Only Mexicans participated, and no drug or alcohol use information was available for the study. The predominant sexual orientation was that of MSM (88.08%). Most of the participants have a permanent job (41.30%); secondary and high school education (31.42%) and health services conditions Mexican Institute for Social Security (IMSS, for Spanish abbreviation) (90.46%). Regarding sexual practices, most of the participants practice anal sex (83.27%), do not use a condom (71.69%), have paid for sex (4.94%), have charged for sex (9.44%), during their lives, were rape victims (18.56%).

The prevalence of HIV stratified by each of the sociodemographic characteristics and the variables of interest are shown in Table.1.

Table 1 Prevalence of factors related to HIV in Playa del Carmen, Quintana Roo. 

Variable Positive Negative Total Prevalence Odds CI 95% P Value
Sex
Female 20 1858 1878 1.06 0.01 0.01 0.02 p < .00001
Male ** 110 2812 2922 3.76 0.04 0.03 0.05 p < .00001
Sexual preference
Homosexual 99 313 412 24.03 0.32 0.25 0.40 p < .00001
Heterosexual 20 4208 4228 0.47 0.00 0.00 0.01 p < .00001
Bisexual 11 149 160 6.88 0.07 0.01 0.14 p < .001
Age groups
12 to 17 2 68 70 2.86 0.03 0.01 0.12 p = .9384
18 to 24 42 1857 1899 2.21 0.02 0.02 0.03 p = .0864
25 to 29 35 1320 1355 2.58 0.03 0.02 0.04 p = .7373
30 to 39 39 933 972 4.01 0.04 0.03 0.06 p < .01
40 to 49 7 352 359 1.95 0.02 0.01 0.04 p = .3574
49 to 60 5 140 145 3.45 0.04 0.01 0.09 p = .5773
Occupation type
Permanent employment 64 1850 1914 3.34 0.03 0.03 0.04 p = .0272
Temporal employment 35 1298 1333 2.63 0.03 0.02 0.04 p = .8268
Housewife 6 430 436 1.38 0.01 0.01 0.03 p = .0723
Student 5 289 294 1.70 0.02 0.01 0.04 p = .2720
Businessman 3 231 234 1.28 0.01 0.00 0.04 p = .1682
Unemployed 10 267 277 3.61 0.04 0.02 0.07 p = .3409
Sex Worker 23 24 4.17 0.04 0.01 0.32 p = .6591
Other 4 118 122 3.28 0.03 0.01 0.09 p = .6943
Scholarship
Elementary school 7 269 276 2.54 0.03 0.01 0.06 p = .8560
Middle School 26 1069 1095 2.37 0.02 0.02 0.04 p = .4385
High School 47 1563 1610 2.92 0.03 0.02 0.04 p = .5225
Technical career 8 288 296 2.70 0.03 0.01 0.06 p = .9951
Degree 36 1299 1335 2.70 0.03 0.02 0.04 p = .975.3
Postgraduate 2 64 66 3.03 0.03 0.01 0.13 p = .8711
Social security
IMSS- 104 4227 4331 2.40 0.02 0.02 0.03 p < .0001
Popular Insurance 10 196 206 4.85 0.05 0.03 0.10 p = .0525
None 16 235 251 6.37 0.07 0.04 0.11 p < .001
Residence entity
Quintana Roo 21 726 747 2.81 0.03 0.02 0.04 p = .8504
Veracruz 19 636 655 2.90 0.03 3.00 0.02 p = .7441
Yucatán 14 570 584 2.40 0.02 0.04 0.04 p = .6212
Ciudad de México 11 420 431 2.55 0.03 0.01 0.05 p = .8342
Chiapas 15 551 566 2.65 0.03 0.02 0.05 p = .9277
Tabasco 26 924 950 2.74 0.03 0.02 0.04 p = .9518
Estado de México 2 74 76 2.63 0.03 0.01 0.11 p = .9669
Oaxaca 2 63 65 3.08 0.03 0.01 0.13 p = .8538
Puebla 3 135 138 2.17 0.02 0.01 0.07 p = .6948
Morelos 3 89 92 3.26 0.03 0.01 0.11 p= .7417
Jalisco 3 116 119 2.52 0.03 0.01 0.08 p = .8986
Campeche 4 126 130 3.08 0.03 0.01 0.09 p = .7930
Durango 51 52 1.92 0.02 0.00 0.14 p = .7258
Nayarit 36 37 2.70 0.03 0.00 0.20 p = .9983
Baja California Norte 37 38 2.63 0.03 0.00 0.20 p = .9767
Chihuahua 2 66 68 2.94 0.03 0.01 0.12 p = .9052
Nuevo León 41 42 2.38 0.02 0.00 0.18 p = .8956
Guerrero 9 10 10.00 0.11 0.01 0.88 p = .1551
Condom use
Yes 47 1312 1359 3.46 0.04 0.03 0.05 p = .0442
No 83 3358 3441 2.41 0.02 0.02 0.03 p = .0442
Anal sex
Yes 119 3878 3997 2.98 0.03 0.03 0.04 p < .01
No 11 792 803 1.37 0.01 0.01 0.03 p < .01
Pay for Sex
Yes 11 226 237 4.64 0.05 0.03 0.09 p = .0601
No 119 4444 4563 2.61 0.03 0.02 0.03 p = .0601
Charge for sex
Yes 14 439 453 3.09 0.03 0.02 0.03 p = .5985
No 116 4231 4347 2.67 0.03 0.02 0.03 p = .5985
Rape victim (Historical)
Yes 24 867 891 2.69 0.03 0.02 0.04 p = .9761
No 106 3803 3909 2.71 0.03 0.02 0.03 p = .9761

*Some totals may vary due to “missing values” or multiple responses from participants. **Trans woman was included in the male sex. Abbreviation: Mexican Institute for Social Security (IMSS, for Spanish abbreviation). Source: Author elaboration

Men has a higher prevalence with 3.76%, also, all the sexual preferences are significant, however, men having sex with men has the higher rate with 24.03%. The condition of not having social security seems to be related to a higher prevalence of positive cases 6.37%, schooling maintains the prevalence relatively constant, between 2.6 - 2.8 except for the high school and postgraduate group. People who provide sex services had a prevalence of 4.17%, followed by those in the unemployed category with 3.61%. The distribution of positive cases and the prevalence collected in the Solidaridad region by the state of residence is shown in Figure 1. Tabasco is the state with the highest number of cases (n=26), followed by Quintana Roo (n=21), Veracruz (n=19), Yucatán (n=14), and Chiapas (n=15) were the proximal residence states (temporal workers, tourist) with the highest prevalence. There is a decrease in the number of cases as the distance from the place where the sample was taken increases.

Figure 1 Prevalence of positive cases for HIV according to residence entity in the city of Solidaridad de Quintana Roo, Mexico. Source: Author elaboration. 

The risks for positive HIV tests were calculated using logistic regression models. Each social determinant and sexual behaviour were tested, leaving the statistically significant models. Table 2 details the coefficients that were statistically significant for each condition in the bivariate. The social determinants found as risk were: being a man, and being between 30 and 39 years old. On the other hand, the sexual practices with the highest risk were: MSM (OR: 44.45, CI: 29.23 - 67.62) and in general the practice of anal sex; was the only protective factor. For the multivariate model, the determinants included: being between 30 and 39 years old, and MSM practice (OR: 61.20, CI: 38.67 - 96.84) as factors.

Table 2 Risk factors for positive HIV test using logistic regression 

Variable Bivariate Multivariate
OR (CI95 %) Pseudo R2 OR (CI95 %) Pseudo R2
Men who have sex with men 44.45* (29.23 -67.62) 0.31 61.20* (38.67 -96.84) 0.3491
To have 30 to 39 years old 1.72* (1.17-2.51) 0.01 4.3* (2.66-6.94)
IMSS 0.42* (0.27-0.65) 0.01 0.35* (0.21-0.59)
Being male 3.24* (2.04-5.15) 0.03 --- ---
Anal sex practice 2.21** (1.19-2.12) 0.03 --- ---

* p < 0.0001; **p < 0.01. Abbreviation: Mexican Institute for Social Security (IMSS, for Spanish abbreviation). Ecuation of the multivariate model: Y= -4.5627 + x (4.114102) + x (1.457754) + x (-1.048996) + 1.04 Source: Author elaboration.

Discussion

Since the discovery of HIV in 1983, various strategies have been implemented over the years to mitigate its impact on HIV The World Health Organization (WHO) in coordination with some of the most important research facilities in the world have financed investigations that led to current achievements a better understanding of the virus transmission process, the development of antivirals and higher performance diagnostic tests.

Several health promotion campaigns have been carried out at the international and national levels, focused on prevention; however, the current agenda still presents important challenges primarily focused on social matters. Within the Mexican context, the legislative and political agenda recognizes the importance of the participation of civil society organizations, as a fundamental pillar to mitigate some of the social effects of HIV14. The perception of severity, the fear of HIV and the use of barrier methods, are factors that require more attention from health personnel15. In addition, stigma and discrimination14,16 suffered by people living with HIV continue to impact their quality of life and testing rate, even in countries with universal coverage of health services such as Cuba17. In this same sense, social factors have become decisive in understanding the behaviours of the disease15,18,19.

Quintana Roo has been increased VIH cases since 1990 according to the info of the Institute for Health Metrics and Evaluation. Also, the prevalence for people lowers of 70 years old in 2018 is 3.12 for each thousand people. The significant social determinants and sexual behaviors points to higher risk for MSM, also the condition of being man, as well as have 30-39 age. Something that was not described before in the literature, age group the highest risk of being positive among. Social Security has shown a protective factor, probably linked with health interventions.

Even though the increase in testing rates is one of the action lines that has proven to be most useful in terms of cost- benefit and is one of the main guidelines for managing the pandemic by the WHO20, testing continues to be a problem. Recent studies in Spain report up to 83.3% of losses in diagnosis19. In Mexico, it has already been documented that MSM a vulnerable population16: Present study confirms the high risk for this group with a crude OR of 44.45 and an adjusted OR of 61.20, a previous systematic review estimates an OR of 108.96 for Mexico and 33.3 for MSM in Latin America2. Also, a threefold risk was observed in this study simply for having the male condition. In general, men tend to do more testing than women 17% vs. 82% respectively; In addition to this, there is a greater risk in being a man due to the association of higher risky sexual practices that this gender have21.

Regarding the age groups that have 30 to 39 years was the unique significant risk in the regression models with a raw OR of 1.72 and an adjusted OR of 4.3 (95% CI 2.66- 6.94). In contrast, other studies previously carried out in Quintana Roo, report a higher prevalence of HIV in the age group of 25 to 39 years22. A longitudinal analysis of cases reported from 1983 to 2021 with epidemiological surveillance information from the General Management of Epidemiology reported 107,179 cases from 20 to 29 age group, representing 33.7% of all reported cases; the group of 30 to 39 years old has 104,969 cases representing 33.0% of the total cases. These two age groups historically account for more than 65% of the total cases in the past 38 years in the country, since the appearance of HIV23. This fact may be population bias compared to the region as it is a turistical place.

Some social determinants were associated with a higher risk of contagion and drive attention to the economically active population. Sexual practices and behaviours are also considered a significant risk, the practice of anal sex doubles the risk of positivity, these findings are consistent with other studies in Mexico and Latin America2,21,22,23,24. The findings of this study agree with what is reported in the national and international literature, adding the information about stratified prevalence by social determinants and sexual behaviours, which describes and characterizes the panorama of HIV in a Mexican Region.

One of the main limitations of this study is that, since it is not population-based. Also, self-selection may induce sampling bias of the results; however, as noted among the argumentation, findings follow the previously reported national and international patterns. Another factor that limits the results; is the bias due to the stigma HIV testing represents. These results confirm national and international trends for the testing strategy, therefore, a possible over-representation of men with risky sexual practices and economically active population (i.e. its more likely to travel if you are in this economic population) should be considered. Also, it may be a strength of sampling, making test in not usually context may low stigma and prejudice bias.

Conclusions

This study provides relevant data for decision making, confirms witch social determinants are relevant to the VIH infection: being a man, have 30 to 39 years old as one of the determinants. Social Security shows to be a protective factor with an adjusted OR of 0.35 (I.C.95% 0.21 - 0.59). Sexual practices such as MSM and the practice of anal sex in general, are shown as cardinal risk factors for positive HIV tests.

References

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9. Li R, Wang H, Pan X, Ma Q, Chen L, Zhou X, et al. Prevalence of condomless anal intercourse and recent HIV testing and their associated factors among men who have sex with men in Hangzhou, China: A respondent-driven sampling survey. PLoS One. 2017 Mar 1;12(3). [ Links ]

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Funding

None to declare.

Received: August 31, 2022; Accepted: October 11, 2022

*Corresponding Author: María Eugenia Jiménez Corona. Postal address: Department of Epidemiology of the National Institute of Cardiology "Ignacio Chávez" Juan Badiano 1, Col. Section XVI, Tlalpan City Hall, C.P. 14080, Mexico City, Mexico. Email: mejimenez777@gmail.com

None to declare.

Study design; analysis and interpretation of results, writing of the article and approval of the final version. G.C.T., Study design; analysis and interpretation of results, writing of the article. L.L.R., Analysis and interpretation of results and approval of the final version. A.J.C., Collection of patient data, revision of the final manuscript. R.G., Design and preparation of the geographic database and elaboration of cartography. A.R.S., Writing of the article and approval of the final version. G.A.G.B., Study design; analysis and interpretation of results, writing of the article and approval of the final version. M.E.J.C.

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