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JAIDS Journal of Acquired Immune Deficiency Syndromes:
doi: 10.1097/01.qai.0000243100.49899.2a
Epidemiology and Social Science

Characteristics of Recently HIV-Infected Men Who Use the Internet to Find Male Sex Partners and Sexual Practices With Those Partners

Smith, Davey M MD, MAS*†; Drumright, Lydia N PhD, MPH*; Frost, Simon D W DPhil*; Cheng, W Susan MPH*; Espitia, Stephen MS†; Daar, Eric S MD‡; Little, Susan J MD*; Gorbach, Pamina M MHS, DrPH‡

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From the *University of California, San Diego, La Jolla, CA; †Veterans Affairs San Diego Healthcare System, San Diego, CA; and ‡Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, CA.

Received for publication May 11, 2006; accepted July 27, 2006.

D. M. Smith and L. N. Drumright contributed equally to this work.

Supported by the Universitywide AIDS Research Program grants ID01-SDSU-056, ID01-LA-056, IS02-SD-701, and CCTG-CC99 SD003; National Institutes of Health grants 5K23AI055276, AI27670, AI38858, AI043638, AI43752, AI29164, AI47745, AI57167, AI29164, AI27660, and M01-RR00425; University of California, San Diego Center for AIDS Research (AI36214); and Research Center for AIDS and HIV Infection of the San Diego Veterans Affairs Healthcare System (10-92-035).

The authors have reported no financial conflict with the publication of this paper.

Written informed consent was obtained from all patients, and the human experimentation guidelines of the US Department of Health and Human Services and the individual institutions were followed in conducting this research.

Reprints: Davey M. Smith, MD, MAS, University of California, San Diego, 9500 Gilman Drive 0679, La Jolla, CA 92093-0679 (e-mail: davey@ucsd.edu).

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Objective: To examine (1) characteristics of recently HIV-infected men who have sex with men (MSM) who find sex partners through the Internet and (2) differences in characteristics of and sexual behaviors practiced with Internet partners as compared to other partner types.

Methods: From May 2002 to 2005, a computer-assisted self-interview was administered to 194 recently HIV-infected MSM in southern California. MSM who used the Internet to find sex partners were compared with those who did not report Internet use, and partners found from the Internet were compared with those who were found from other venues using χ2 analyses, t tests, logistic regression, and generalized estimating equations.

Results: Seventy percent of participants reported using the Internet to find partners in the prior 3 months. In multivariate analysis, Internet users as compared to non-Internet users reported higher education levels (some college vs. high school: odds ratio [OR] = 5.04; P < 0.01 and college or greater vs. high school: OR = 9.61; P = 0.01), were more likely to be white (OR = 2.16; P = 0.04), reported more partners in the prior 3 months (OR = 1.05; P = 0.04), were more likely to have had sexual contact with all their last 3 partners after HIV diagnosis (OR = 3.43; P < 0.01), and were more likely to report that all their last 3 partners were HIV-negative (OR = 3.35; P = 0.02), but none were main partners (OR = 2.36; P = 0.02). When compared with partners who were found in other venues, Internet partners were less likely to be main partners (OR = 0.52; P < 0.01) and were more likely to be younger (OR = 0.98; P = 0.05), to be HIV-negative (OR = 1.88; P = 0.02), and to become sex partners after HIV diagnosis (OR = 1.58; P = 0.03).

Conclusions: The Internet is a popular venue for recently HIV-infected MSM to find partners, many of whom are HIV-negative. Because finding sex partners through the Internet occurs after HIV diagnosis, the Internet could be a valuable target for new HIV prevention strategies.

In 1998, <20% of households in the United States had Internet access. By 2003, more than 65% of adults in California had Internet access.1 Men who have sex with men (MSM) may find the Internet especially attractive for finding sex partners because it offers some anonymity, allowing them to connect to other MSM or to find specific types of partners without negative social consequences. It may also be more time-efficient to find sex partners on the Internet than in bars or dance clubs. Rejection from a potential sex partner may also be less embarrassing on-line than in other settings. These factors help to explain why the Internet has become a popular venue for MSM to find sex partners.2-10 Frequent use of the Internet to find partners,4,7 the large number of sites that cater to finding sex partners for MSM,3 and the recent increases in HIV incidence among MSM11,12 have led to growing concern about the Internet as a potential catalyst for HIV transmission, however.10,13

Some cross-sectional studies indicate that the Internet has the potential to aid in serostatus disclosure and may promote serosorting among HIV-positive MSM,14,15 whereas other studies indicate that MSM who use the Internet to find sex partners are more likely to report unprotected anal intercourse (UAI) with partners who are serodiscordant for HIV or of unknown serostatus.4,16 Other risky behaviors such as drug use,16-18 increased number of sex partners,16 sex with anonymous partners,17 group sex,18 and trading sex for money or drugs2 have been reported at higher frequencies by MSM who use the Internet to find partners than by their non-Internet-using peers. Using the Internet to find sex partners has also been associated with syphilis outbreaks among MSM in San Francisco19 and Los Angeles.17 Although these studies indicate that the Internet may be a venue that has the potential to increase risky sexual behaviors, little is known about specific behaviors with Internet partners.

To investigate HIV risks associated with finding sex partners through the Internet, we compared characteristics of MSM who were recently infected with HIV who used the Internet to find partners with characteristics of those who did not and examined differences between their recent Internet and non-Internet partners. By studying MSM with recent HIV infection, we focus on the part of the sexual network in which HIV transmission is most likely to occur, providing insight into risks for acquiring HIV and the subsequent transmission to sex partners.20

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Between May 2002 and August 2005, 207 of the 211 recently HIV-infected individuals who were recruited into the Southern California Acute Infection and Early Disease Research Program (AIEDRP) cohort completed a computer-assisted self-interview (CASI). Eligibility of enrollment in the AIEDRP requires that all participants have laboratory-documented evidence of HIV infection within 12 months before enrollment as previously described.21,22 Among the 207 participants who completed the questionnaire, responses from 13 (4 women, 8 men who reported sexual contact with women only, and 1 man who reported no sex partners) were not included in these analyses because the focus of this study was Internet use among MSM. Data from all 194 male participants who reported sexual activity with men in the previous 12 months were included in these analyses.

Interviews were completed, on average, 5 weeks (median = 3 weeks) after HIV diagnosis and 15 weeks (median = 13 weeks) after the estimated date of infection. Participants were asked about their sexual histories, including where they found sex partners in the 12-, 3-, and 1-month periods before their interview. Those who reported finding at least 1 sex partner through the Internet in the 3 months before program enrollment were classified as finding sex partners through the Internet. Detailed information was also collected on the respondents' last 3 sex partners, including meeting location, types of sexual contact, partner type (main partner vs. other), partner's age, partner's HIV status, timing of the first and last sexual episodes with that partner, and any recreational drug use during sexual activity with that partner. All participants were deemed mentally fit at the time of enrollment, gave informed consent, and received a study code to protect confidentiality. The study was approved by the Institutional Review Boards of the University of California, San Diego; University of California, Los Angeles (UCLA), Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance; and Cedar-Sinai Medical Center, Los Angeles.

Data were entered by participant response into Ci3 (Sawtooth Technologies, Northbrook, IL) and analyzed using STATA version 8.2 SE (StataCorp LP, College Station, TX). Associations between finding sex partners on the Internet in the previous 3 months and demographics and sexual histories of the participants were examined using χ2 analyses, t tests, and univariate and multivariate logistic regression. Multivariate generalized estimating equations (GEEs) were used to examine differences in behavior with and characteristics of partners who were met on the Internet as compared to those who were met elsewhere. GEEs were selected so as to correct variance estimates for repeated measures on the same individual. For all multivariate analyses, models were constructed by including variables that were considered theoretically significant from a review of the literature, were potential confounders, or were significant by univariate analysis; however, some variables, such as male only versus male and female sex partners, were removed from these models because data were too sparse to assess associations appropriately and inclusion reduced the efficiency of the model.

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Of the 194 participants, 70% reported using the Internet to find sex partners in the previous 12 months. The median age of the participants was 35 years, most reported white ethnicity (69.6%), and most (87.6%) had at least some college education (Table 1). Most were employed (70.6%) and had lived in their home city for more than 12 months (85.6%). The average reported gross annual income was $50,000 US. Most (93.8%) reported having sexual contact with men only, as compared to men and women, in the previous 12 months. The average number of male partners reported in the previous 3 months was 9.2, with a median of 4. More than one quarter (27.8%) reported that sexual contact with all the last 3 partners occurred after their HIV diagnosis, and approximately half (54.6%) reported that none of the last 3 partners was a main partner. Most participants (84.0%) reported UAI with at least 1 of their last 3 partners; however, only 17.5% reported that all these partners were HIV-negative.

Table 1
Table 1
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In univariate (Table 1) and multivariate (Table 2) analyses, participants who used the Internet to recruit sex partners in the past 3 months were significantly more likely than those who did not use the Internet to be white (74.6% vs. 60.3%, adjusted odds ratio [AOR] = 2.16; P = 0.04), to be more highly educated (56.4% vs. 32.4% for college or higher vs. high school, AOR = 9.61; P < 0.01), to report more male sex partners during the prior 3 months (11.1 vs. 5.7; P < 0.01 and AOR = 1.05; P = 0.04), to report no main partners among their last 3 (62.7% vs. 39.7%; P < 0.01 and AOR = 2.36; P = 0.02), and to have had sexual contact with all their last 3 partners after their HIV diagnosis (34.9% vs. 14.7%, AOR = 3.43; P < 0.01). Additionally, in multivariate but not univariate models, Internet users were more likely than nonusers to report that all their last 3 partners were HIV-negative (AOR = 3.35; P = 0.02). For the index participant, employment status, duration of time spent in the current city, and UAI with any of the last 3 partners were not associated with recruiting sex partners on the Internet (Tables 1, 2).

Table 2
Table 2
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Of the 572 partners, respondents met 2.1% (12 partners) in the park; 3.0% (17 partners) at work or school, 12.6% (72 partners) in a bathhouse; 13.1% (75 partners) through friends; 14.3% (82 partners) at a bar or club; 37.2% (213 partners) on the Internet; and 17.7% (101 partners) in various other locations, including during travel. On average, partners were 33.5 years old (median = 33 years), and most (61.3%) were reported to be of white ethnicity (Table 3). Participants reported that they did not know the HIV status of 47.7% of partners and believed that 40.9% were HIV-negative and that only 11.4% were HIV-positive; however, UAI was reported with 54.9% of partners. Few partners (18.0%) were described as main partners, substance use during sexual activity was reported with 43.3% of partners, and sexual contact occurred after participant HIV diagnosis with 46.7% of partners. In univariate GEE analyses, those partners met on the Internet were significantly less likely to be main partners (odds ratio [OR] = 0.66; P = 0.04) and were more likely to be younger (OR = 0.8; P = 0.04) than partners met in other venues (Table 3).

Table 3
Table 3
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In multivariate GEE models containing all 194 participants (accounting for 572 partnerships), partners that MSM met through the Internet were less likely to be main partners (OR = 0.52; P = 0.03), were more likely to be younger (OR = 0.98; P = 0.054 for every year of age), were more likely to be HIV-negative (OR = 1.88; P = 0.02), and were more likely to be partners after the participant was diagnosed with HIV (OR = 1.58; P = 0.03) as compared with partners met in all other venues (Table 4). Furthermore, higher educational attainment was associated with meeting one's partner on the Internet (OR = 3.03; P = 0.02 for some college vs. high school and OR = 3.28; P = 0.01 for college or more vs. high school). There were no significant interactions between UAI and partner HIV status with respect to meeting partners on the Internet and no significant association between UAI and meeting a partner on the Internet when examining data on HIV-negative or unknown status partners only (data not shown).

Table 4
Table 4
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To explore changes in behavior before and after HIV diagnosis, the sample was split into 305 partnerships from 140 of the 194 participants in which sexual activity occurred before HIV diagnosis and 267 partnerships from 135 of the 194 participants in which sexual activity occurred after HIV diagnosis. Before HIV diagnosis, 33% of sex partners were recruited through the Internet (n = 102). Slightly more partners (n = 111 [42%]) were recruited through the Internet after HIV diagnosis. Among those partners in which sexual contact occurred after HIV diagnosis, Internet partners were significantly less likely to be main partners (OR = 0.47; P = 0.03) and more likely to be younger (OR = 0.96; P = 0.01 for every 1 year of age; see Table 4). Participants who were more highly educated were more likely to find partners from the Internet after HIV diagnosis (OR = 3.49; P = 0.04 for some college vs. high school and OR = 3.29; P = 0.06 for college or more vs. high school). Additionally, increased likelihood of UAI was marginally associated with meeting a sex partner on the Internet after HIV diagnosis (OR = 1.61; P = 0.08). Among partners with whom sexual activity occurred before HIV diagnosis, Internet partners were marginally less likely to be main partners (OR = 0.47; P = 0.06). No other partner or partnership characteristic was associated with finding partners from the Internet among partners with whom sexual contact occurred before HIV diagnosis.

To develop a further understanding of potential HIV transmission events, several stratified analyses were conducted using GEEs to examine associations between UAI and HIV status (Fig. 1). Before stratifying by timing of sexual activity with respect to HIV diagnosis, UAI was significantly more likely with HIV-positive partners in general (P = 0.02) and with those met at venues other than the Internet (P = 0.01) but not with those met on the Internet (P = 0.52). Conversely, there were no associations between UAI and HIV status with partners before HIV diagnosis (Fig. 1). After HIV diagnosis, however, UAI was again more common with HIV-infected partners in the overall sample (P = 0.01) and among those partners who were met at venues other than the Internet (P = 0.02) but not with partners met on the Internet (P = 0.33).

Figure 1
Figure 1
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Our results support previously published studies that the Internet is a common venue for MSM to meet sex partners.4,5,7,8,23 Similarly, we found that recently HIV-infected MSM who use the Internet to find sex partners were more likely to be white and educated.3,7 Our current investigation extends those previous observations with findings important to the understanding of how MSM with recent HIV infection use the Internet to find sex partners. We found that recently HIV-infected MSM who use the Internet to find sex partners were more often white and more educated and reported more male partners than non-Internet users. Additionally, sex partners found through the Internet were less likely to be main partners, more likely to be younger, more likely to be become partners after HIV diagnosis, and more likely to be considered HIV-negative than partners from other venues. These results suggest that after HIV diagnosis, younger and more educated MSM may be more likely to use the Internet to find younger nonmain partners. Although the Internet seemed to bridge HIV-positive MSM from our sample with negative-MSM, UAI with Internet partners was no more likely than with partners found from other venues, regardless of partner HIV status.

Some studies have shown that after HIV diagnosis, individuals reported less risky HIV transmission behavior,24 which is consistent with the findings of our own previous reports from this cohort.25 By offering a level of anonymity, the Internet could be a powerful tool to aid in serostatus disclosure and negotiation of harm reduction sexual practices.14,15 Although our investigations did not specifically address these practices, our data suggest that HIV-positive MSM often select HIV-negative partners when using the Internet to meet partners. We did not find that they were more likely to report UAI with their HIV-negative Internet partners, however. Additionally, HIV status of the partner was the perceived status as reported by the respondent and may not reflect the actual HIV status of the partner, because HIV status is often poorly reported through surrogate sources.26

Although finding partners on the Internet was not associated with an increased risk of UAI or increased UAI with HIV-negative partners, it is concerning that UAI with Internet partners was not related to these partners' HIV status. After diagnosis, among partners met in locations other than the Internet, UAI was most likely if the partner was HIV-positive. Such serosorting has been reported previously15 and would be expected if MSM with HIV infection were trying to protect their HIV-negative partners. Such behavior was not observed with Internet partners, however, suggesting that although UAI with HIV-negative partners may not increase after HIV diagnosis, something other than the HIV status of the partner is driving the decision to have UAI with Internet partners.

We estimate that our sample represents only approximately 5% of MSM who are recently infected with HIV in our 2 recruitment counties (San Diego and Los Angeles), given the total number of HIV diagnoses in these 2 areas.27,28 Therefore, we cannot claim that our sample is generalizable to the larger population of newly infected MSM, nor can we claim that they are generalizable to all MSM, because the sexual behavior of MSM at a population level has been noted to be different between US cities.15 Although the number of participants enrolled into this study is smaller than samples of MSM with chronic HIV infection, this cohort focuses on individuals who are at the greatest risk for transmitting their infection,29,30 which is important in understanding between-partner transmission dynamics of HIV. Additionally, our sample may be biased toward newly infected MSM with a higher education and socioeconomic status, because individuals with these characteristics are more likely to be aware of their HIV risks and are more likely to participate in research studies.31 Furthermore, all the data, including sexual behavior data, were self-reported, which is the greatest limitation of most sexual behavior research.31 Truthful reporting of sensitive information was most likely enhanced, however, because the information was collected via CASI.32

The Internet is a relatively new venue for MSM to meet sex partners as compared to bars that cater to MSM or bathhouses, but it has rapidly become popular; one third of all sex partners reported in our study were found through the Internet. The Internet has also become a convenient tool for rapid dissemination of information.1 By developing a better understanding of the characteristics of MSM who use the Internet to find partners and the sexual behaviors they engage in with these partners, successful Internet-based interventions may be developed for HIV prevention. In recent studies, most MSM agreed that they would be willing to read prevention messages posted on the Internet,33 which is an encouraging sign that suggests great promise for Internet-based HIV risk reduction interventions.

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The authors are grateful to the study participants for their unwavering generosity in participating in this research project. They also express gratitude to Heidi Aiem, Tari Gilbert, Jacqui Pitt, Paula Potter, and Joanne Santangelo for their dedication and commitment to the patients and their assistance in data collection; to Laureen Copfer for editorial assistance with this manuscript; and to Douglas Richman for intellectual discussions and scientific insight.

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22. Acute Infection and Early Disease Research Program (AIEDRP). Available at: www.aiedrp.org. Accessed May 1, 2006.

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25. Gorbach PM, Drumright LN, Daar ES, et al. Transmission behaviors of recently HIV-infected men who have sex with men. J Acquir Immune Defic Syndr. 2006;42:80-85.

26. Niccolai LM, Farley TA, Ayoub MA, et al. HIV-infected persons' knowledge of their sexual partners' HIV status. AIDS Educ Prev. 2002;14:183-189.

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30. Wawer MJ, Gray RH, Sewankambo NK, et al. Rates of HIV-1 transmission per coital act, by stage of HIV-1 infection, in Rakai, Uganda. J Infect Dis. 2005;191:1403-1409.

31. Fenton KA, Johnson AM, McManus S, et al. Measuring sexual behaviour: methodological challenges in survey research. Sex Transm Infect. 2001;77:84-92.

32. Newman JC, Des Jarlais DC, Turner CF, et al. The differential effects of face-to-face and computer interview modes. Am J Public Health. 2002;92:294-297.

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Internet; men who have sex with men; partnerships; primary HIV; risk

© 2006 Lippincott Williams & Wilkins, Inc.


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