Sexual risk behavior in women with cervical human papillomavirus infection

A meta-analysis and systematic literature review of factors associated with sexual risk-taking during international travel

BACKGROUND

International travel facilitates global spread of sexually transmitted infections (STI). Travellers could contribute to onward transmission of pathogens rarely encountered at home and export new strains to the destination. The aim was to systematically examine evidence regarding determinants of travel-related sexual risk-taking and identify knowledge gaps and areas for targeted interventions.

METHOD

Articles published in peer-reviewed journals from 2000 to 2017 were screened in 6 databases and assessed for relevance against criteria. Data was extracted for factors associated with travel-related STI or proxies. Meta-analyses estimated pooled prevalence of casual sex and non-condom use. Adjusted odds ratios of predictors were pooled to generate a combined estimate.

RESULT

Forty-nine articles qualified for inclusion. A heterogeneity test indicated variation across studies. The pooled prevalence of casual travel sex was 35% and prevalence of non-condom use 17%. Expectations of casual sex strongly predicted sex with a new partner when travelling abroad. Planning to have sex indicated condom use.

CONCLUSION

The studies largely represented sub-groups of risk-taking populations from a European context, indicating substantial knowledge gaps. Studies investigating migrants travelling to visit friends and relatives, older travellers, and female travelers are needed. Post-travel harm reduction activities may serve as a focus for future interventions.

The Association Between Unwanted Sexual Experiences and Early-Onset Cervical Cancer and Precancer by Age 25: A Case-Control Study

BACKGROUND

We examined the association between unwanted sexual experiences and cervical cancer, cervical intraepithelial neoplasia 3, adenocarcinoma in situ, diagnosed ≤25 years of age.

METHODS

A case-control study of women ≤55 years who attended gynecological hospitals in Australia between 1983 and 2007. Cases were ≤25 years when diagnosed with disease, control group 1 were "older women" >25 years at diagnosis; control group 2 were "well women" ≤25 years attending preventive health clinics. A self-administered postal survey was utilized. The main outcome measures were prevalence of childhood sexual abuse (<16 years) and unwanted adolescent sexual experiences (between 16 and 18 years) in cases compared to controls.

RESULTS

Of 400 contactable subjects, 251 participated (62.8%). Prevalence of childhood sexual abuse in cases (26.6% [25/94]) was similar to other groups. Prevalence of childhood genital contact abuse in cases with cervical cancer was 45.5% [5/11], compared to older women (20% [10/50], p = 0.08) and well women (13.8% [8/58], p = 0.01), and was marginally more common compared to well women when adjusted for other lifestyle factors (odds ratio [OR]: 4.7 [1.0-22.6], p = 0.05). Prevalence of unwanted adolescent sexual experiences in cases was 28.9% [33/114]. Prevalence of adolescent penile-genital contact experiences in cervical cancer cases was 46.7% [7/15], compared to older women (9.4%, [6/64], p < 0.001) and well women (13.7%, [10/73], p = 0.003), and was more common compared to well women when adjusted for lifestyle (OR: 5.9 [1.4-24.9], p = 0.02) and sexual health risk factors (OR: 5.6 [1.4-22.1] p = 0.01).

CONCLUSIONS

Unwanted sexual experiences with genital contact were a risk factor for invasive cervical cancer ≤25 years, likely due to a complex interplay of biological and environmental factors.

Preventing women's sexual risk behaviors during travel

Sexually transmitted infections (STIs) are a global concern. Although several countries have tracked the incidence of STIs acquired during travel to foreign countries, the United States lags behind in this practice. Nevertheless, there is evidence from the US and several countries that women engage in sexual risk behaviors during travel whether domestic or foreign, thereby placing themselves at risk for contracting STIs. Guidelines for assessment, prevention, and travel-related supplies and resources are discussed.

Coercive sexual experiences and subsequent human papillomavirus infection and squamous intraepithelial lesions in adolescent and young adult women

PURPOSE

The purpose of this study was to examine the associations between coercive sexual experiences and subsequent human papillomavirus (HPV) infection and/or squamous intraepithelial lesion (SIL) in adolescent and young adult women, and to determine whether risk behaviors mediate and sociodemographic factors moderate any observed associations.

METHODS

Data were obtained from a longitudinal cohort study of female university students (N = 608). chi2 and Wilcoxon rank-sum tests were used to determine associations between history of a coercive sexual experience and subsequent risk behaviors, and between risk behaviors and HPV or SIL. Logistic regression models were used to determine whether a coercive sexual experience was associated with HPV or SIL and whether the association was mediated by risk behaviors and/or moderated by sociodemographic factors.

RESULTS

Twenty-two percent of participants reported a prior coercive sexual experience. Report of a prior coercive sexual experience was associated with a higher lifetime number of sexual partners (p < .0001), which in turn was associated with subsequent HPV infection (p < .0001) and SIL (p < .0001). In logistic regression models, coercive sexual experience was associated significantly with HPV (odds ratio [OR], 1.84; 95% confidence interval [CI], 1.19-2.84) and at a marginal significance level with SIL (OR, 1.90; 95% CI, .97-3.70). When the number of sexual partners was included in the first model, the association between coercive sexual experience and HPV infection became nonsignificant and the beta coefficient decreased by 49%. Race and age did not appear to moderate the association between coercive sexual experience and HPV.

CONCLUSIONS

The number of sexual partners is an important mechanism through which adolescent and young adult women who report a coercive sexual experience acquire HPV.

Multiple paternity and population genetic structure in natural populations of the poeciliid fish, Heterandria formosa

Heterandria formosa Agassiz, exhibits internal fertilization, internal brooding of embryos, sperm storage and an extreme level of superfetation. In this study we used microsatellite markers to examine variation among seven populations that exhibited significant variance in their histories of population density. We found that the populations were genetically distinct and that the heterozygosity increased as population density increased. We also examined paternity in three of those populations and found that the number of sires per female and the number of sires per brood increased with population density. Overall, the rates of multiple paternity are quite low relative to other species. The correlations with population density suggest that contact rates play a critical role in the breeding system in this species but the low rates of multiple paternity suggest that females may exert control over fertilization of their ova.

Mediators of the association between age of first sexual intercourse and subsequent human papillomavirus infection

OBJECTIVE

Previous studies have demonstrated that early age of first sexual intercourse is associated with human papillomavirus (HPV) infection. The objective of this study was to identify a set of risk behaviors and partner characteristics that mediate the association between age of first sexual intercourse and subsequent HPV infection in adolescent and young adult women.

METHODS

Female university students completed surveys and underwent HPV testing every 6 months for up to 3 years. HPV-positive participants were matched to HPV-negative participants (252 pairs, total N = 504). Associations were examined between risk behaviors/partner characteristics and both age of first sexual intercourse and HPV infection. Those variables associated with either age of first sexual intercourse or HPV infection were entered into a generalized estimating equation (to account for the matched study design) modeling the association between age of first sexual intercourse and HPV infection.

RESULTS

Mean age of first sexual intercourse was 16.7 (+/-1.8) years, and early age of first sexual intercourse was associated significantly with HPV infection (beta = -0.20; odds ratio: 0.82; 95% confidence interval: 0.74-0.90). The association was mediated by number of sexual partners in the past 6 months, history of sexually transmitted infection, alcohol and drug use related to sexual behaviors, and partner's number of sexual partners.

CONCLUSION

A set of behavioral risk factors and partner characteristics partially mediate the association between age of first sexual intercourse and subsequent HPV infection.

Contraceptive use and reproductive history in women with cervical human papillomavirus infection

The study was conducted to investigate whether cervical human papillomavirus infections (CHPI) are associated with contraceptive use and reproductive history. The contraceptive and reproductive histories in 972 women seeking contraceptive advice were noted and screening conducted for human papillomavirus infection. The interview included number of pregnancies and childbirths, legal and spontaneous abortions, and menstrual pattern. Information about current use of contraceptive methods, about casual sex, and history of combined oral contraceptive pill (OC) use was obtained. Women with a history of spontaneous abortion showed a significant correlation with CHPI, as did women who used high-dose OCs when compared with the remaining study population (odds ratio 3.0). There was no association between use of low-dose OCs and CHPI. In multifactorial analyses with adjustment for age, number of lifetime sexual partners, number of partners during the preceding six months and age at first intercourse, the significant correlation between use of high-dose OCs and CHPI remained (adjusted odds ratio 2.8). The results indicate a relationship between female steroid hormones and the occurrence of CHPI. An association with high-dose OCs could not be excluded.

Smoking, alcohol, sexual behaviour and drug use in women with cervical human papillomavirus infection

OBJECTIVE

The aim of the study was to determine if smoking is associated with cervical human papillomavirus infection (CHPI) independent of sexual risk factors.

SETTING

Two family planning clinics and one youth clinic in Sweden.

SUBJECTS

Human papillomavirus (HPV) DNA was found in cervical samples of 66 (6.8%) of 972 women attending for contraceptive advice, using Southern blot tests.

RESULTS

Among women with cervical human papillomavirus infection (CHPI), 33 (50%) were smokers, as compared to 307 (33.9%) among a comparison group of HPV-negative women (odds ratio = 2.0, 95% CI = 1.2-3.2). After stepwise adjustment for number of lifetime partners, number of partners last six months, age at first intercourse, alcohol use, drug abuse and history of or current sexually transmitted disease other than CHPI, the odds ratio decreased to 1.4 (95% CI = 0.8-2.4). Recent use of alcohol and ever use of narcotics were also significantly correlated to CHPI in crude analyses, but vanished in multifactorial analyses after adjustment for the mentioned sexual risk behavioral factors.

CONCLUSIONS

The results of this study indicate that smoking, alcohol and drug abuse are risk markers, but not causal factors, for CHPI.