Assessing the annual economic burden of preventing and treating anogenital human papillomavirus-related disease in the US: analytic framework and review of the literature

Epigenome-wide methylation and progression to high-grade cervical intraepithelial neoplasia (CIN2+): a prospective cohort study in the United States

BACKGROUND

Methylation levels may be associated with and serve as markers to predict risk of progression of precancerous cervical lesions. We conducted an epigenome-wide association study (EWAS) of CpG methylation and progression to high-grade cervical intraepithelial neoplasia (CIN2 +) following an abnormal screening test.

METHODS

A prospective US cohort of 289 colposcopy patients with normal or CIN1 enrollment histology was assessed. Baseline cervical sample DNA was analyzed using Illumina HumanMethylation 450K (n = 76) or EPIC 850K (n = 213) arrays. Participants returned at provider-recommended intervals and were followed up to 5 years via medical records. We assessed continuous CpG M values for 9 cervical cancer-associated genes and time-to-progression to CIN2+. We estimated CpG-specific time-to-event ratios (TTER) and hazard ratios using adjusted, interval-censored Weibull accelerated failure time models. We also conducted an exploratory EWAS to identify novel CpGs with false discovery rate (FDR) < 0.05.

RESULTS

At enrollment, median age was 29.2 years; 64.0% were high-risk HPV-positive, and 54.3% were non-white. During follow-up (median 24.4 months), 15 participants progressed to CIN2+. Greater methylation levels were associated with a shorter time-to-CIN2+ for CADM1 cg03505501 (TTER = 0.28; 95%CI 0.12, 0.63; FDR = 0.03) and RARB Cluster 1 (TTER = 0.46; 95% CI 0.29, 0.71; FDR = 0.01). There was evidence of similar trends for DAPK1 cg14286732, PAX1 cg07213060, and PAX1 Cluster 1. The EWAS detected 336 novel progression-associated CpGs, including those located in CpG islands associated with genes FGF22, TOX, COL18A1, GPM6A, XAB2, TIMP2, GSPT1, NR4A2, and APBB1IP.

CONCLUSIONS

Using prospective time-to-event data, we detected associations between CADM1-, DAPK1-, PAX1-, and RARB-related CpGs and cervical disease progression, and we identified novel progression-associated CpGs.

IMPACT

Methylation levels at novel CpG sites may help identify individuals with ≤CIN1 histology at higher risk of progression to CIN2+ and inform risk-based cervical cancer screening guidelines.

Human Papillomavirus Vaccine

Cervical cancer is the fourth most common cancer in women worldwide with immense associated morbidity and mortality. Although most of the cervical cancer cases are caused by the human papillomavirus (HPV) and can effectively be prevented by HPV vaccination, vaccination unfortunately remains underused on a global scale with vast inequities in distribution. A vaccine as a tool to prevent cancer, cervical and others, is largely unprecedented. Then why do HPV vaccination rates globally remain so low? This article explores the burden of disease, development of the vaccine and its subsequent uptake, cost-effectiveness, and associated equity issues.

The Impact of Broader Value Elements on Cost-Effectiveness Analysis: Two Case Studies

OBJECTIVES

This study aimed to explore the impact of including broader value elements in cost-effectiveness analyses by presenting 2 case studies, one on human papillomavirus (HPV) infection and one on early-stage Hodgkin's lymphoma (ESHL).

METHODS

We identified broader value elements (eg, patient and caregiver time, spillover health effects, productivity) from the Second Panel's Impact Inventory and the ISPOR Special Task Force's value flower. We then evaluated the cost-effectiveness of HPV vaccination versus no vaccination (case 1) and combined modality therapy (CMT) versus chemotherapy alone for treatment of adult ESHL (case 2) using published simulation models. For each case study, we compared incremental cost-effectiveness ratios considering health sector impacts only (the "base-case" scenario) with incremental cost-effectiveness ratios incorporating broader value elements.

RESULTS

For vaccination of US girls against HPV before sexual debut versus no vaccination, the base-case result was $38 334 per disability-adjusted life-year averted. Including each broader value element made cost-effectiveness progressively more favorable, with HPV vaccination becoming cost-saving (ie, reducing costs and averting more disability-adjusted life-years) when the analysis incorporated productivity costs. For CMT versus chemotherapy alone in patients with ESHL, the base-case result indicated that CMT was cost-saving. Including all elements made this treatment's net monetary benefits (the sum of its averted resource costs and the net value of its health impacts) less favorable, even as the contribution from CMT's near-term health benefits grew.

CONCLUSIONS

Including broader value elements can substantially influence cost-effectiveness ratios, although the direction and the magnitude of their impact can differ across interventions and disease context.

Efficacy of Topically Administered Dihydroartemisinin in Treating Papillomavirus-Induced Anogenital Dysplasia in Preclinical Mouse Models

The artemisinin family of compounds is cytopathic in certain cancer cell lines that are positive for human papillomaviruses (HPV) and can potentially drive the regression of dysplastic lesions. We evaluated the efficacy of topical dihydroartemisinin (DHA) on cervical dysplasia and anal dysplasia in two papillomavirus mouse models: K14E6/E7 transgenic mice, which express HPV16 oncogenes; and immunodeficient NOD/SCID gamma (NSG) mice infected with Mus musculus papillomavirus (MmuPV1). Mice started treatment with DHA at 25 weeks of age (K14E6/E7) or 20 weeks post infection (MmuPV1-infected), when the majority of mice are known to have papillomavirus-induced low- to high-grade dysplasia. Mice were treated with or without topical DHA at the cervix or anus and with or without topical treatment with the chemical carcinogen 7,12 dimethylbenz(a)anthracene (DMBA) at the anus of in transgenic mice to induce neoplastic progression. Mice were monitored for overt tumor growth, and tissue was harvested after 20 weeks of treatment and scored for severity of histological disease. For MmuPV1-infected mice, anogenital lavages were taken to monitor for viral clearance. Tissues were also evaluated for viral gene expression at the RNA and/or protein levels. Treatment with topical DHA did not reduce dysplasia in the anogenital tract in either papillomavirus-induced mouse model and did not prevent progression to anal cancer in the DMBA-treated K14E6/E7 mice.

Centralized Reminder/Recall for Human Papillomavirus Vaccination: Findings From Two States-A Randomized Clinical Trial

PURPOSE

Centralized reminder/recall (C-R/R) using Immunization Information Systems has been effective in increasing childhood immunization rates. Previously, C-R/R using autodialer for human papillomavirus (HPV) vaccine did not raise rates. We assessed C-R/R for HPV vaccine using other modalities and focused on younger adolescents.

METHODS

We conducted a three-arm pragmatic RCT in randomly sampled primary care practices in Colorado (n = 88) and New York (n = 136), proportionate to where adolescents received care. We randomized, within practices, adolescents aged 11-14 years who had not completed the HPV vaccination series to receive C-R/R using different modalities (Colorado: autodialer, mail, or control; New York: autodialer, text, or control). Up to two reminders were sent in intervention arms for each dose needed between 2/2017 and 12/2018.

RESULTS

In Colorado, no significant differences were found for series initiation (31.3% control, 31.1% autodial, 31.8% mail), with slight improvement for series completion in the autodialer arm (29.7% control, 31.1% autodialer, p = .04) but not the mail arm (30.9%, p = .06). No significant differences were found in New York for series initiation (24.1% for all arms) or completion (17.1% control, 16.9% autodial, 17.9% text). Adjusted analyses showed higher completion rates for the autodialer arm in Colorado but not for other arms. In Colorado, C-R/R reduced time to series completion by around 2 months. Cost per adolescent was $1.81 for mail; under $.40 for all other modalities.

CONCLUSIONS

C-R/R has less benefit for raising HPV vaccination rates than other studies have noted for childhood immunizations, although it may quicken series completion at little cost.

Effect of Training Pediatric Clinicians in Human Papillomavirus Communication Strategies on Human Papillomavirus Vaccination Rates: A Cluster Randomized Clinical Trial

IMPORTANCE

Missed opportunities for human papillomavirus (HPV) vaccination during pediatric health care visits are common.

OBJECTIVES

To evaluate the effect of online communication training for clinicians on missed opportunities for HPV vaccination rates overall and at well-child care (WCC) visits and visits for acute or chronic illness (hereafter referred to as acute or chronic visits) and on adolescent HPV vaccination rates.

DESIGN, SETTING, AND PARTICIPANTS

From December 26, 2018, to July 30, 2019, a longitudinal cluster randomized clinical trial allocated practices to communication training vs standard of care in staggered 6-month periods. A total of 48 primary care pediatric practices in 19 states were recruited from the American Academy of Pediatrics Pediatric Research in Office Settings network. Participants were clinicians in intervention practices. Outcomes were evaluated for all 11- to 17-year-old adolescents attending 24 intervention practices (188 clinicians) and 24 control practices (177 clinicians). Analyses were as randomized and performed on an intent-to-treat basis, accounting for clustering by practice.

INTERVENTIONS

Three sequential online educational modules were developed to help participating clinicians communicate with parents about the HPV vaccine. Weekly text messages were sent to participating clinicians to reinforce learning. Statisticians were blinded to group assignment.

MAIN OUTCOMES AND MEASURES

Main outcomes were missed opportunities for HPV vaccination overall and for HPV vaccine initiation and subsequent doses at WCC and acute or chronic visits (visit-level outcome). Secondary outcomes were HPV vaccination rates (person-level outcome). Outcomes were compared during the intervention vs baseline.

RESULTS

Altogether, 122 of 188 clinicians in intervention practices participated; of these, 120, 119, and 116 clinicians completed training modules 1, 2, and 3, respectively. During the intervention period, 29 206 adolescents (14 664 girls [50.2%]; mean [SD] age, 14.2 [2.0] years) made 15 888 WCC and 28 123 acute or chronic visits to intervention practices; 33 914 adolescents (17 069 girls [50.3%]; mean [SD] age, 14.2 [2.0] years) made 17 910 WCC and 35 281 acute or chronic visits to control practices. Intervention practices reduced missed opportunities overall by 2.4 percentage points (-2.4%; 95% CI, -3.5% to -1.2%) more than controls. Intervention practices reduced missed opportunities for vaccine initiation during WCC visits by 6.8 percentage points (-6.8%; 95% CI, -9.7% to -3.9%) more than controls. The intervention had no effect on missed opportunities for subsequent doses of the HPV vaccine or at acute or chronic visits. Adolescents in intervention practices had a 3.4-percentage point (95% CI, 0.6%-6.2%) greater improvement in HPV vaccine initiation compared with adolescents in control practices.

CONCLUSIONS AND RELEVANCE

This scalable, online communication training increased HPV vaccination, particularly HPV vaccine initiation at WCC visits. Results support dissemination of this intervention.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT03599557.

Viral Venereal Diseases of the Skin

Viral venereal diseases remain difficult to treat. Human papilloma virus (HPV) and herpes simplex virus (HSV) are two common viral venereal diseases. HPV infections are characterized by anogenital warts and less commonly by premalignant or malignant lesions. HSV infections classically present as grouped vesicles on an erythematous base with associated burning or pain; however, immunosuppressed patients may have atypical presentations with nodular or ulcerative lesions. This review discusses the epidemiology, diagnosis, and management of anogenital HPV and HSV infections with an emphasis on treatment modalities for the practicing dermatologist. Diagnosis of these diseases typically relies on clinical assessment, although multiple diagnostic techniques can be utilized and are recommended when diagnosis is uncertain or evaluating an individual with increased risk of malignancy. Management of HPV and HSV infections involves appropriate counseling, screening, and multiple treatment techniques. Particularly for HPV infections, a practitioner may need to use a combination of techniques to achieve the desired outcome.

The effect of anxiety, psychopathological symptoms and personality traits on response to treatment in male patients with anogenital warts: a prospective study

BACKGROUND

In the era of precision medicine, identification of possible predictive factors of clinical response to treatment is fundamental. This need is particularly strong for anogenital warts (AGW), because there are several treatment modalities with different clearance and recurrence rates. However, data regarding the effect of mental health parameters on response to treatment in patients with AGW are lacking.

OBJECTIVES

The purpose of the present study was to evaluate the association between patients' mental health parameters and AGW treatment outcomes.

METHODS

This was a single-centre, prospective study that included newly diagnosed male patients with AGW. At their initial visit, all patients completed the State-Trait Anxiety Inventory (STAI), the Symptom Checklist-90-Revised (SCL-90-R) and the Eysenck Personality Questionnaire (EPQ) questionnaires, which evaluate anxiety, psychopathological manifestations and personality traits, respectively. All patients received cryotherapy until clearance of lesions and were followed up for 18 months for detection of recurrences.

RESULTS

The study included 167 male patients. The mean number of days for AGW clearance was 89 ± 65. During the 18-month follow-up, 28% of participants showed a recurrence, after a mean number of 150 ± 132 days. No statistically significant association was detected between questionnaires scores and (a) time needed for AGW clearance, (b) time until 1st recurrence and (c) number of recurrences.

CONCLUSION

If confirmed, our findings indicate that we may not need to modify our AGW treatment plan according to a patient's mental health profile.

Predictors associated with and the prevalence of condylomata acuminata infection among people in Southern Brazil

Objectives:  To estimate the prevalence of condylomata acuminata/HPV and evaluate associated predictors in infected patients. Methods: In this cross-sectional and retrospective study, medical records of patients who attended a public health referral center located in Southern Brazil, Parana, between April 2012 and March 2017 were reviewed. Epidemiological, clinical, and laboratory data were analyzed using the chi-square and odds ratio (OR) with 95% confidence interval (CI). Results: The overall prevalence of condylomata acuminata/HPV in 3,447 patients was 33.1% (n = 1,140). Coinfection of condylomata/HPV with other STI was noted in 23.7% (n = 270) of cases. The population was characterized by a high prevalence (43.8%) in patients aged < 20 years, women (37.4%), white (33.3%), educational level with more than 8 years of study (33.7%), widowed (39.2%), heterosexual (36.7%), and ages between 13 and 19 years at first sexual intercourse (41.1%). A significant association was observed between male sex and multiple partners and between male sex and irregular use of condoms (p < 0.001). The predictors associated with HPV infection were the age group of up to 29 years (OR 2.0, 95% CI 1.3–3.7, p < 0.013) and homosexual/bisexual (OR 0.2, 95% CI 0.12–0.66, p = 0.003). Conclusion: The findings showed a high prevalence of condylomata acuminata in a public health center study, with emphasis on the age range below the third decade of life and sexual behavior predictors. These predictors are important for the determination of preventive measures against the transmission of infection and the development of cancer.

The patent buyout price for human papilloma virus (HPV) vaccine and the ratio of R&D costs to the patent value

Human papillomavirus (HPV) is responsible for almost all of the 570,000 new cases of cervical cancer and approximately 311,000 deaths per year. HPV vaccination is an integral component of the World Health Organization’s (WHO) global strategy to fight the disease. However, high vaccine prices enforced through patent protection are limiting vaccine expansion, particularly in low- and middle-income countries. By limiting market power, patent buyouts could reduce vaccine prices and raise HPV vaccination rates while keeping innovation incentives. We estimate the global patent buyout price as the present discounted value (PDV) of the future profit stream over the remaining patent length for Merck’s HPV vaccines (Gardasil-4 and 9), which hold 87% of the global HPV vaccine market, in the range of US$ 15.6–27.7 billion (in 2018 US$). The estimated PDV of the profit stream since market introduction amounts to US$ 17.8–42.8 billion and the estimated R&D cost to US$ 1.05–1.21 billion. Thus, we arrive at a ratio of R&D costs to the patent value of the order of 2.5–6.8%. We relate this figure to typical estimates of the probability of success (POS) for clinical trials of vaccines to discuss if patent protection provides Merck with extraordinarily strong price setting power.

Incidence of anogenital warts: epidemiological risk factors and real-life impact of human papillomavirus vaccination

Anogenital warts (AGWs) rank among the most frequent sexually transmitted infections in young adults. They are benign lesions, but they pose a significant economic cost to health care systems and a substantial psychological burden on patients, who need evidence-based counselling. Human papillomavirus (HPV) vaccination has shown very high protection rates against AGWs in clinical trials and real-world settings but vaccination coverage remains low in many countries. The aim of this review is to summarize the current evidence on the risk factors for AGW development and to present the available real-life data on the impact of HPV vaccination on AGW incidence. An increased number of lifetime sexual partners, a new sexual partner in the last 12 months, smoking, and immunosuppression have been associated with increased risk for AGWs. HPV vaccination has led to a dramatic decline in AGW incidence in populations that have achieved high vaccination rates. These conclusions can contribute to primary prevention of AGWs and evidence-based counselling of AGW patients.

Topical therapies for the treatment of cervical intraepithelial neoplasia (CIN) 2-3: A narrative review

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CIN management is currently surveillance or surgical therapy. This review describes current research on medical therapies.

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Imiquimod is the most studied with evidence of safety and efficacy.

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5-Fluorouracil has also shown promise with two clinical trials showing efficacy as adjuvant and primary treatment.

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Antivirals therapies have produced mixed results with cidofovir showing the most potential.

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The data remains weak regarding hormonal, herbal and alternative therapies rending it difficult to draw conclusions.

Current management of Cervical Intraepithelial Neoplasia (CIN), caused by high-risk human papillomavirus (hr-HPV), is based on surveillance and surgical therapy. Procedures carry potential risks such as preterm birth, and access remains limited throughout the world. However, there are no medical therapies recommended to promote the clearance of hr-HPV infection or CIN. Ultimately, even if less efficacious than excision procedures, medical therapies have the potential to decrease cervical cancer by eliminating barriers to treatment, such as access to treatment, or serving as an adjunct to surgical treatment in both high- and low-resource settings.

This review describes current research on topical therapies with the potential for self-application for the treatment of HPV or CIN. Therapies included are immune-modulators, anti-proliferative medications, antivirals, hormones, and herbal/alternative therapies. Randomized trials of immune-modulating (imiquimod), anti-proliferative (5-fluorouracil), and anti-viral (cidofovir) therapies have had the most promising results. However, no option has sufficient clinical trial evidence to be recommended as treatment for CIN 2–3 and surgery remains the standard of care.

The research described in this review serves as a guide for the development of future trials in the burgeoning arena of topical therapies for CIN 2–3.

Effect of State Immunization Information System Centralized Reminder and Recall on HPV Vaccination Rates

BACKGROUND

Although autodialer centralized reminder and recall (C-R/R) from state immunization information systems (IISs) has been shown to raise childhood vaccination rates, its impact on human papillomavirus (HPV) vaccination rates is unclear.

METHODS

In a 4-arm pragmatic randomized controlled trial across 2 states, we randomly selected practices representative of the specialty (pediatrics, family medicine, and health center) where children received care. Within each practice, patients 11 to 17.9 years old who had not completed their HPV vaccine series (NY: N = 30 616 in 123 practices; CO: N = 31 502 in 80 practices) were randomly assigned to receive 0, 1, 2, or 3 IIS C-R/R autodialer messages per vaccine dose. We assessed HPV vaccine receipt via the IIS, calculated intervention costs, and compared HPV vaccine series initiation and completion rates across study arms.

RESULTS

In New York, HPV vaccine initiation rates ranged from 37.0% to 37.4%, and completion rates were between 29.1% and 30.1%, with no significant differences across study arms. In Colorado, HPV vaccine initiation rates ranged from 31.2% to 33.5% and were slightly higher for 1 reminder compared with none, but vaccine completion rates, ranging from 27.0% to 27.8%, were similar. On adjusted analyses in Colorado, vaccine initiation rates were slightly higher for 1 and 3 C-R/R messages (adjusted risk ratios 1.07 and 1.04, respectively); completion rates were slightly higher for 1 and 3 C-R/R messages (adjusted risk ratios 1.02 and 1.03, respectively).

CONCLUSIONS

IIS-based C-R/R for HPV vaccination did not improve HPV vaccination rates in New York and increased vaccination rates slightly in Colorado.

The Use of Both Therapeutic and Prophylactic Vaccines in the Therapy of Papillomavirus Disease

Human papillomavirus (HPV) is the most common sexually transmitted virus. The high-risk HPV types (i.e., HPV16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, 59) are considered to be the main etiological agents of genital tract cancers, such as cervical, vulvar, vaginal, penile, and anal cancers, and of a subset of head and neck cancers. Three prophylactic HPV vaccines are available that are bivalent (vs. HPV16, 18), tetravalent (vs. HPV6, 11, 16, 18), and non-avalent (vs. HPV6, 11, 16, 18, 31, 33,45, 52, 58). All of these vaccines are based on recombinant DNA technology, and they are prepared from the purified L1 protein that self-assembles to form the HPV type-specific empty shells (i.e., virus-like particles). These vaccines are highly immunogenic and induce specific antibodies. Therapeutic vaccines differ from prophylactic vaccines, as they are designed to generate cell-mediated immunity against transformed cells, rather than neutralizing antibodies. Among the HPV proteins, the E6 and E7 oncoproteins are considered almost ideal as targets for immunotherapy of cervical cancer, as they are essential for the onset and evolution of malignancy and are constitutively expressed in both premalignant and invasive lesions. Several strategies have been investigated for HPV therapeutic vaccines designed to enhance CD4⁺ and CD8⁺ T-cell responses, including genetic vaccines (i.e., DNA/ RNA/virus/ bacterial), and protein-based, peptide-based or dendritic-cell-based vaccines. However, no vaccine has yet been licensed for therapeutic use. Several studies have suggested that administration of prophylactic vaccines immediately after surgical treatment of CIN2 cervical lesions can be considered as an adjuvant to prevent reactivation or reinfection, and other studies have described the relevance of prophylactic vaccines in the management of genital warts. This review summarizes the leading features of therapeutic vaccines, which mainly target the early oncoproteins E6 and E7, and prophylactic vaccines, which are based on the L1 capsid protein. Through an analysis of the specific immunogenic properties of these two types of vaccines, we discuss why and how prophylactic vaccines can be effective in the treatment of HPV-related lesions and relapse.

Budget impact analysis of cervical cancer screening in Portugal: comparison of cytology and primary HPV screening strategies

Background

Primary Human Papilloma Virus (HPV) testing is the currently recommended cervical cancer (CxCa) screening strategy by the Portuguese Society of Gynecology (SPG) clinical consensus. However, primary HPV testing has not yet been adopted by the Portuguese organized screening programs. This modelling study compares clinical benefits and costs of replacing the current practice, namely cytology with ASCUS HPV triage, with 2 comparative strategies: 1) HPV (pooled) test with cytology triage, or 2) HPV test with 16/18 genotyping and cytology triage, in organized CxCa screenings in Portugal.

Methods

A budget impact model compares screening performance, clinical outcomes and budget impact of the 3 screening strategies. A hypothetical cohort of 2,078,039 Portuguese women aged 25–64 years old women is followed for two screening cycles. Screening intervals are 3 years for cytology and 5 years for the HPV strategies. Model inputs include epidemiological, test performance and medical cost data. Clinical impacts are assessed with the numbers of CIN2–3 and CxCa detected. Annual costs, budget impact and cost of detecting one CIN2+ were calculated from a public healthcare payer’s perspective.

Results

HPV testing with HPV16/18 genotyping and cytology triage (comparator 2) shows the best clinical outcomes at the same cost as comparator 1 and is the most cost-effective CxCa screening strategy in the Portuguese context. Compared to screening with cytology, it would reduce annual CxCa incidence from 9.3 to 5.3 per 100,000, and CxCa mortality from 2.7 to 1.1 per 100,000. Further, it generates substantial cost savings by reducing the annual costs by €9.16 million (− 24%). The cost of detecting CIN2+ decreases from the current €15,845 to €12,795. On the other hand, HPV (pooled) test with cytology triage (comparator 1) reduces annual incidence of CxCa to 6.9 per 100,000 and CxCa mortality to 1.6 per 100,000, with a cost of €13,227 per CIN2+ detected with annual savings of €9.36 million (− 24%). The savings are mainly caused by increasing the length of routine screening intervals from three to five years.

Conclusion

The results support current clinical recommendations to replace cytology with HPV with 16/18 genotyping with cytology triage as screening algorithm.

Genital Wart Recurrence Among Men Residing in Brazil, Mexico, and the United States

BACKGROUND

Genital wart (GW) incidence is high among men. The percentage and rate at which subsequent GW events occur are understudied. The purpose of this study was to describe the rate of subsequent GWs, associated human papillomavirus (HPV) types, and time to subsequent GW event among unvaccinated men.

METHODS

The study was nested within a multinational prospective HPV natural history study of men aged 18-70 years in the United States, Mexico, and Brazil, examined every 6 months for a median follow-up of 50.4 months. Subsequent GW events were defined as GWs detected after ≥16 weeks of the prior event.

RESULTS

Forty-four percent of men experienced ≥1 GW following the initial episode. Men with ≥2 subsequent events were at highest risk of continued GW experiences, with as high as 10 postinitial GW events. The incidence rate of each subsequent GW increased with increasing events (incidence of first subsequent event was 13.1 vs 36.6/1000 person-months for the fourth event). The proportion of GWs among HPV-6 and/or -11-positive patients remained constant across events. Approximately 63%-69% were positive for ≥1 of the 9-valent HPV vaccine types.

CONCLUSIONS

These data highlight the high burden of GWs among men across the lifespan and the need for vaccination to prevent multiple GW episodes.

Prevalence and incidence of genital warts and cervical Human Papillomavirus infections in Nigerian women

BACKGROUND

Genital warts are important causes of morbidity and their prevalence and incidence can be used to evaluate the impact of HPV vaccination in a population.

METHODS

We enrolled 1020 women in a prospective cohort study in Nigeria and followed them for a mean (SD) of 9 (4) months. Nurses conducted pelvic examinations and collected ectocervical samples for HPV testing. We used exact logistic regression models to identify risk factors for genital warts.

RESULTS

The mean age of study participants was 38 years, 56% (535/962) were HIV-negative and 44% (427/962) were HIV-positive. Prevalence of genital warts at enrolment was 1% (4/535) among HIV-negative women, and 5% (23/427) among HIV-positive women. Of 614 women (307 HIV negative and 307 HIV positive women) for whom we could compute genital wart incidence, it was 515 (95% CI:13-2872) per 100,000 person-years in HIV-negative and 1370 (95% CI:283-4033) per 100,000 person-years in HIV-positive women. HIV was associated with higher risk of prevalent genital warts (OR:7.14, 95% CI:2.41-28.7, p < 0.001) while higher number of sex partners in the past year was associated with increased risk of incident genital warts (OR:2.86, 95% CI:1.04-6.47. p = 0.04). HPV11 was the only HPV associated with prevalent genital warts in this population (OR:8.21, 95% CI:2.47-27.3, p = 0.001).

CONCLUSION

Genital warts are common in Nigeria and our results provide important parameters for monitoring the impact of future HPV vaccination programs in the country. HIV infection and number of sexual partners in past year were important risk factors for prevalent and incident genital warts respectively.

Prevalence, incidence and correlates of low risk HPV infection and anogenital warts in a cohort of women living with HIV in Burkina Faso and South Africa

OBJECTIVE

To report the prevalence and incidence of low-risk human papillomavirus infection (LR-HPV) and anogenital warts (AGW) among women living with HIV (WLHIV) in Burkina Faso (BF) and South Africa (SA), and to explore HIV-related factors associated with these outcomes.

METHODS

We enrolled 1238 WLHIV (BF = 615; SA = 623) aged 25-50 years and followed them at three time points (6, 12 and 16 months) after enrolment. Presence of AGW was assessed during gynaecological examination. Cervico-vaginal swabs for enrolment and month 16 follow-up visits were tested for HPV infection by Inno-LiPA® genotyping. Logistic regression was used to assess risk factors for prevalent infection or AGW. Cox regression was used to assess risk factors for incident AGW.

RESULTS

Women in SA were more likely than those in BF to have prevalent LR-HPV infection (BF: 27.1% vs. SA: 40.9%; p<0.001) and incident LR-HPV infection (BF: 25.8% vs. SA: 31.6%, p = 0.05). Prevalence of persistent LR-HPV was similar in the two countries (BF: 33.3% vs. SA: 30.4%; p = 0.54), as were prevalence and incidence of AGW (Prevalence: BF: 7.5% vs. SA: 5.7%; p = 0.21; Incidence: BF: 2.47 vs. SA: 2.33 per 100 person-years; p = 0.41). HPV6 was associated with incident AGW (BF: adjusted Hazard Ratio (aHR) = 4.88; 95%CI: 1.36-17.45; SA: aHR = 5.02; 95%CI: 1.40-17.99). Prevalent LR-HPV (BF: adjusted Odds Ratio [aOR = 1.86]; 95%CI: 1.01-3.41; SA: aOR = 1.75; 95%CI: 0.88-3.48); persistent LR-HPV (BF: aOR = 1.92; 95%CI: 0.44-8.44; SA: aOR = 2.81; 95%CI: 1.07-7.41) and prevalent AGW (BF: aOR = 1.53; 95%CI: 0.61-3.87; SA: aOR = 4.11; 95%CI: 1.20-14.10) were each associated with low CD4+ counts (i.e. <200 vs. >500 cells/μL). Duration of ART and HIV plasma viral load were not associated with any LR-HPV infection or AGW outcomes.

CONCLUSION

LR-HPV infection and AGW are common in WLHIV in sub-Saharan Africa. Type-specific HPV vaccines and effective ART with immunological reconstitution could reduce the burden of AGW in this population.

The Direct Medical Costs of Diseases Associated with Human Papillomavirus Infection in Manitoba, Canada

BACKGROUND

The total direct cost of screening and treating all human papillomavirus-related diseases (HPV-RD) has not been measured in a single study. Accurate cost estimates are needed to inform decisions on intervention priorities and evaluate the cost-effectiveness of existing programs. We used province-wide clinical, administrative, and accounting databases to measure direct medical costs of HPV infection in Manitoba (Canada).

METHODS

All persons 9 years or older with health insurance coverage in Manitoba between April 2000 and March 2015 were eligible. We identified all persons with an incident HPV-RD and aggregated all medical costs (in 2014 Canadian dollars) related to that condition, including prescription drugs, diagnostic procedures, in-hospital and outpatient treatment, and physician visits.

RESULTS

We found that the median cost of treating a case of anogenital warts was $130. An episode of cervical dysplasia had a median cost of $220, compared to $1300 for an episode of cervical carcinoma in situ. The cost of treating HPV-related invasive cancer varied from $15,000 for cervical cancer to $33,000 for oral cavity cancer. Overall, 80% ($145 million) of the total cost was attributable to HPV infection. Cervical screening and follow-up accounted for $96 million (66%) of all costs and this cost component has declined following the introduction of new screening guidelines.

CONCLUSIONS

Overall, the average direct medical cost of HPV infection was $720 per newborn. The economic burden of HPV remains significant, although changes in cervical screening guidelines, prompted by the introduction of a public HPV vaccine program, appear to have promoted a promising trend towards lower costs.

Early Outcomes of a Multilevel Human Papillomavirus Vaccination Pilot Intervention in Federally Qualified Health Centers

OBJECTIVE

Human papillomavirus (HPV) vaccine coverage in the United States remains low compared with other adolescent vaccines. As the largest primary care network in the United States, safety net clinics such as federally qualified health centers (FQHCs) serve patients at a disproportionate risk of HPV-related cancers. In this pilot project, the American Cancer Society (ACS) leveraged its primary care workforce to implement quality improvement interventions in the unique context of 30 FQHC systems across the country, including 130 clinic sites reaching >20,000 adolescents in a variety of geographic settings.

METHODS

FQHC systems were randomly selected to receive either a $90,000 2-year grant, a $10,000 3-month grant, or training and technical assistance without funding. All 3 intervention groups conducted provider training and education, completed a capacity assessment tool, and measured HPV vaccination rates. Annual HPV vaccine series initiation and completion rates for active, 11- to 12-year-old patients were measured to evaluate project outcomes.

RESULTS

HPV vaccine series initiation rates among 11- to 12-year-old patients increased by 14.6 percentage points from a baseline of 41.2% before the intervention (2014) to the intervention year (2015). Changes in HPV second dose and series completion rates were not statistically significant. Meningococcal and tetanus, diphtheria, and acellular pertussis vaccination rates also increased significantly, by 13.9 and 9.9 percentage points from baseline rates of 49.1% and 52.5%, respectively.

CONCLUSIONS

The first year of this pilot project showed early success, particularly with HPV vaccine series initiation. On the basis of these promising results, ACS is expanding clinical quality improvement projects to increase HPV vaccination across the country.

Examining HPV- and HPV vaccine-related cognitions and acceptability among US-born and immigrant hispanics and US-born and immigrant non-Hispanic Blacks: a preliminary catchment area study

PURPOSE

Disparities in HPV vaccination exist. Therefore, we investigated the distinction and disparities in HPV- and HPV vaccine-related cognitions and acceptability among US-born African Americans (AA) and Black immigrants, and between US-born Latinas and Latina immigrants.

METHODS

Secondary data analyses were conducted with 383 female adults divided into non-Hispanic Blacks-(1) AA born in the US (n = 129) and (2) Black immigrants (n = 53), and Hispanics-(3) Latinas born in the US (n = 57) and (4) Latina immigrants (n = 144). HPV-related cognitions are assessed by measuring HPV-related knowledge and HPV vaccine-related awareness, beliefs, accessibility, and acceptability.

RESULTS

Black and Latina immigrants were less likely to know where they can get/refer for HPV vaccine (p = .007) than their US-born counterparts. Latina immigrants were less likely to have heard of HPV vaccine (p = .033), know where they can get more information about HPV vaccine (p = .045), and know where they can get/refer for HPV vaccine (p = .001) than US-born Latinas. Both immigrant groups (Black: p = .046; Latina: p = .044) were more likely to report cost concerns than their counterparts. US-born AA were the least likely to endorse HPV vaccine safety (31.0%) and efficacy (39.7%), whereas US-born Latinas endorsed efficacy (63.2%) but less safety (44.6%). Overall, vaccine acceptability was low across all groups.

CONCLUSIONS

Group disparities in HPV vaccine cognitions emerged, but they all had notable HPV vaccine acceptability (safety and efficacy) barriers. HPV vaccine safety and efficacy were highly unfavorable in US-born AA. The HPV vaccine safety concerns are demonstrated with only 31-54% reporting that the "HPV vaccine is safe"-potentially increasing their risk of HPV vaccine negation. With regards to HPV vaccine efficacy, only 40-63% of this study population endorsed HPV vaccine efficacy. Additionally, immigrants reported greater HPV vaccine cost barriers and healthcare access concerns-increasing their risk for HPV vaccine naiveté. Therefore, our findings on HPV vaccine cognitions and acceptability can inform targeted strategies to increase vaccination among US and immigrant Hispanics and non-Hispanic Blacks who are at elevated risk for HPV-related cancers.

Prevalence of anogenital HPV infection, related disease and risk factors among HIV-infected men in inner-city Johannesburg, South Africa: baseline findings from a cohort study

BACKGROUND

Persistent high-risk human papillomavirus (HR-HPV) infection is associated with the development of anogenital cancers, particularly in men living with HIV (MLWH). We describe the prevalence of anogenital HPV infection, abnormal anal cytology and anogenital warts (AGWs) in MLWH in Johannesburg, and explore whether HPV infection and receipt of antiretroviral treatment is associated with detection of abnormal anal cytology and AGWs.

METHODS

We enrolled a cohort of 304 sexually-active MLWH ≥18 years, who completed a questionnaire and physical examination. Genital swabs were collected from all men and intra-anal swabs from 250 (82%). Swabs were tested for HPV DNA and genotypes, and anal smears graded using the Bethesda classification. Factors associated with anogenital disease were assessed by logistic regression models.

RESULTS

Two thirds were receiving antiretroviral treatment, for a median 33 months (IQR = 15-58) and 54% were HIV-virologically suppressed. Only 5% reported ever having sex with men. Among 283 genital swabs with valid results, 79% had any HPV, 52% had HR-HPV and 27% had >1 HR-HPV infection. By comparison, 39% of the 227 valid intra-anal swabs had detectable HPV, 25% had any HR-HPV and 7% >1 HR infection. While most anal smears were normal (51%), 20% had ASCUS and 29% were LSIL. No cases had HSIL or cancer. Infection with >1 HR type (adjusted OR [aOR] = 2.39; 95%CI = 1.02-5.58) and alpha-9 types (aOR = 3.98; 95%CI = 1.42-11.16) were associated with having abnormal cytology. Prevalence of AGWs was 12%. Infection with any LR type (aOR = 41.28; 95%CI = 13.57-125.62), >1 LR type (aOR = 4.14; 95%CI = 1.60-10.69), being <6 months on antiretroviral treatment (aOR = 6.90; 95%CI = 1.63-29.20) and having a CD4+ count <200 cells/μL (aOR = 5.48; 95%CI: 1.60-18.78) were associated with having AGWs.

CONCLUSIONS

In this population, anogenital HR-HPV infection and associated low-grade disease is common, but severe anal dysplasia was not detected. Findings reinforce the need for HPV vaccination in men for preventing both AGWs and HR-HPV infection. Given the absence of anal HSILs, however, the findings do not support the use of anal screening programmes in this population.

Comparison of the Natural History of Genital HPV Infection among Men by Country: Brazil, Mexico, and the United States

Background: Male genital human papillomavirus (HPV) prevalence and incidence has been reported to vary by geographical location. Our objective was to assess the natural history of genital HPV by country among men with a median of 48 months of follow-up.Methods: Men ages 18-70 years were recruited from United States (n = 1,326), Mexico (n = 1,349), and Brazil (n = 1,410). Genital specimens were collected every 6 months and HPV genotyping identified 37 HPV genotypes. Prevalence of HPV was compared between the three countries using the Fisher exact test. Incidence rates and 95% confidence intervals were calculated. The median time to HPV clearance among men with an incident infection was estimated using the Kaplan-Meier method.Results: The prevalence and incidence of the genital HPV types known to cause disease in males (HPV 16 and 6) was significantly higher among men from Brazil than men from Mexico. Prevalence and incidence of those genital HPV types in the United States varied between being comparable with those of Mexico or Brazil. Although genital HPV16 duration was significantly longer in Brazil (P = 0.04) compared with Mexico and the United States, HPV6 duration was shortest in Brazil (P = 0.03) compared with Mexico and the United States.Conclusions: Men in Brazil and Mexico often have similar, if not higher prevalence of HPV compared with men from the United States.Impact: Currently, there is no routine screening for genital HPV among males and while HPV is common in men, and most naturally clear the infection, a proportion of men do develop HPV-related diseases. Men may benefit from gender-neutral vaccine policies. Cancer Epidemiol Biomarkers Prev; 26(7); 1043-52. ©2017 AACR.

Cost analysis of Human Papillomavirus-related cervical diseases and genital warts in Swaziland

BACKGROUND

Human papillomavirus (HPV) has proven to be the cause of several severe clinical conditions on the cervix, vulva, vagina, anus, oropharynx and penis. Several studies have assessed the costs of cervical lesions, cervical cancer (CC), and genital warts. However, few have been done in Africa and none in Swaziland. Cost analysis is critical in providing useful information for economic evaluations to guide policymakers concerned with the allocation of resources in order to reduce the disease burden.

MATERIALS AND METHODS

A prevalence-based cost of illness (COI) methodology was used to investigate the economic burden of HPV-related diseases. We used a top-down approach for the cost associated with hospital care and a bottom-up approach to estimate the cost associated with outpatient and primary care. The current study was conducted from a provider perspective since the state bears the majority of the costs of screening and treatment in Swaziland. All identifiable direct medical costs were considered for cervical lesions, cervical cancer and genital warts, which were primary diagnoses during 2015. A mix of bottom up micro-costing ingredients approach and top-down approaches was used to collect data on costs. All costs were computed at the price level of 2015 and converted to dollars ($).

RESULTS

The total annual estimated direct medical cost associated with screening, managing and treating cervical lesions, CC and genital warts in Swaziland was $16 million. The largest cost in the analysis was estimated for treatment of high-grade cervical lesions and cervical cancer representing 80% of the total cost ($12.6 million). Costs for screening only represented 5% of the total cost ($0.9 million). Treatment of genital warts represented 6% of the total cost ($1million).

CONCLUSION

According to the cost estimations in this study, the economic burden of HPV-related cervical diseases and genital warts represents a major public health issue in Swaziland. Prevention of HPV infection with a national HPV immunization programme for pre-adolescent girls would prevent the majority of CC related deaths and associated costs.

Country-specific HPV-related genital disease among men residing in Brazil, Mexico and The United States: The HIM study

The purpose of this study was to assess whether the incidence of histopathologically confirmed condyloma and penile intraepithelial neoplasia (PeIN) and rates of genital HPV infection progression to these lesions differs by country (Brazil, Mexico and the U.S.). At each visit, lesions were biopsied and were categorized by pathologic diagnoses. The Linear Array genotyping method was used to identify HPV genotypes from genital swabs, while the INNO-LiPA HPV Genotyping Extra method was used for tissue specimens. Age-specific analyses were conducted for lesion incidence by country, with Kaplan-Meier estimation of cumulative incidence. The proportion of HPV infections that progressed to condyloma and PeIN, the median time to lesion development and the incidence rates were estimated by country. When comparing demographic and sexual characteristics across the three countries, sexual orientation (p = 0.008) and lifetime number of female sexual partners (p < 0.0001) were differentially associated with lesion incidence in the three countries. Condyloma incidence in Brazil and the U.S. decreased with age, while incidence remained constant across the lifespan in Mexico. There were no differences by country and age for PeIN incidence. HPV types 6 and 11 were the most common types to progress to condyloma and HPV types 16, 6 and 11 were the most common types to progress to PeIN in all three countries. The continuous risk of condyloma and PeIN across all age groups and countries in this study emphasizes the need to ensure that strong HPV immunity, such as that obtained through vaccination, is maintained across the lifespan of men.

Clinical effectiveness and cost-effectiveness of interventions for the treatment of anogenital warts: systematic review and economic evaluation

BACKGROUND

Typically occurring on the external genitalia, anogenital warts (AGWs) are benign epithelial skin lesions caused by human papillomavirus infection. AGWs are usually painless but can be unsightly and physically uncomfortable, and affected people might experience psychological distress. The evidence base on the clinical effectiveness and cost-effectiveness of treatments for AGWs is limited.

OBJECTIVES

To systematically review the evidence on the clinical effectiveness of medical and surgical treatments for AGWs and to develop an economic model to estimate the cost-effectiveness of the treatments.

DATA SOURCES

Electronic databases (MEDLINE, MEDLINE In-Process & Other Non-Indexed Citations, EMBASE, The Cochrane Library databases and Web of Science) were searched from inception (or January 2000 for Web of Science) to September 2014. Bibliographies of relevant systematic reviews were hand-searched to identify potentially relevant studies. The World Health Organization International Clinical Trials Registry Platform and ClinicalTrials.gov were searched for ongoing and planned studies.

REVIEW METHODS

A systematic review of the clinical effectiveness literature was carried out according to standard methods and a mixed-treatment comparison (MTC) undertaken. The model implemented for each outcome was that with the lowest deviance information criterion. A de novo economic model was developed to assess cost-effectiveness from the perspective of the UK NHS. The model structure was informed through a systematic review of the economic literature and in consultation with clinical experts. Effectiveness data were obtained from the MTC. Costs were obtained from the literature and standard UK sources.

RESULTS

Of 4232 titles and abstracts screened for inclusion in the review of clinical effectiveness, 60 randomised controlled trials (RCTs) evaluating 19 interventions were included. Analysis by MTC indicated that ablative techniques were typically more effective than topical interventions at completely clearing AGWs at the end of treatment. Podophyllotoxin 0.5% solution (Condyline(®), Takeda Pharmaceutical Company Ltd; Warticon(®) solution, Stiefel Laboratories Ltd) was found to be the most effective topical treatment evaluated. Networks for other outcomes included fewer treatments, which restrict conclusions on the comparative effectiveness of interventions. In total, 84 treatment strategies were assessed using the economic model. Podophyllotoxin 0.5% solution first line followed by carbon dioxide (CO2) laser therapy second line if AGWs did not clear was most likely to be considered a cost-effective use of resources at a willingness to pay of £20,000-30,000 per additional quality-adjusted life-year gained. The result was robust to most sensitivity analyses conducted.

LIMITATIONS

Limited reporting in identified studies of baseline characteristics for the enrolled population generates uncertainty around the comparability of the study populations and therefore the generalisability of the results to clinical practice. Subgroup analyses were planned based on type, number and size of AGWs, all of which are factors thought to influence treatment effect. Lack of data on clinical effectiveness based on these characteristics precluded analysis of the differential effects of treatments in the subgroups of interest. Despite identification of 60 studies, most comparisons in the MTC are informed by only one RCT. Additionally, lack of head-to-head RCTs comparing key treatments, together with minimal reporting of results in some studies, precluded comprehensive analysis of all treatments for AGWs.

CONCLUSIONS

The results generated by the MTC are in agreement with consensus opinion that ablative techniques are clinically more effective at completely clearing AGWs after treatment. However, the evidence base informing the MTC is limited. A head-to-head RCT that evaluates the comparative effectiveness of interventions used in clinical practice would help to discern the potential advantages and disadvantages of the individual treatments. The results of the economic analysis suggest that podophyllotoxin 0.5% solution is likely to represent a cost-effective first-line treatment option. More expensive effective treatments, such as CO2 laser therapy or surgery, may represent cost-effective second-line treatment options. No treatment and podophyllin are unlikely to be considered cost-effective treatment options. There is uncertainty around the cost-effectiveness of treatment with imiquimod, trichloroacetic acid and cryotherapy.

STUDY REGISTRATION

This study is registered as PROSPERO CRD42013005457.

FUNDING

The National Institute for Health Research Health Technology Assessment programme.

Expression of p16INK4A in cervical precancerous lesions that is unlikely to be preventable by human papillomavirus vaccines

BACKGROUND

Whether higher grade cervical intraepithelial neoplasia (CIN grade 2 or greater [CIN ≥ 2]) that develops because of human papillomavirus (HPV) genotypes not included in vaccines may progress to cervical cancer is largely unknown. The objectives of this study were to document expression of the cyclin-dependent kinase inhibitor 2A (p16) tumor-suppressor protein p16^INK4A as a biomarker of cervical carcinogenesis or of malignant potential and to evaluate whether its expression differs between lesions associated with vaccine and nonvaccine high-risk (HR) human papillomavirus (HPV) genotypes.

METHODS

The study population consisted of 371 women who had not received HPV vaccines. Women were categorized into vaccine and nonvaccine HR-HPV genotypes and lesions associated with those types. Logistic regression analyses were used to determine the association between positive expression p16^INK4A and the risk of being diagnosed with CIN 2 or CIN 3. Differences in the proportion of CIN ≥2 lesions that were positive for p16^INK4A expression by vaccine-related or nonvaccine-related HR-HPV genotype were determined using the Pearson chi-square test.

RESULTS

Specimens that were positive for p16^INK4A expression were 5.3 and 16.6 times more likely to be diagnosed as CIN 2 and CIN 3 lesions, respectively, compared to CIN 1 lesions. CIN ≥ 2 lesions that were negative for the bivalent and 9-valent HR-HPV genotypes had similar rates of positive p16^INK4A expression compared with lesions that were positive for those HR-HPV genotypes.

CONCLUSIONS

Lesions that may develop because of HR-HPV genotypes not included in HPV vaccines are likely to have similar malignant potential, suggesting that well developed screening programs combined with nonvaccine-based approaches may be needed to manage the residual risk of developing cervical cancer in the post-HPV vaccination era. Cancer 2016;122:3615-23. © 2016 American Cancer Society.

Cost-Effectiveness of High-Risk Human Papillomavirus Testing With Messenger RNA Versus DNA Under United States Guidelines for Cervical Cancer Screening

OBJECTIVES

To compare the cost-effectiveness of high-risk human papillomavirus (hrHPV) testing using a hrHPV DNA and a hrHPV messenger RNA (mRNA) assay under current US cervical cancer screening guidelines.

METHODS

We constructed a Markov model for stochastic cost-effectiveness analysis using published data. We compared screening efficiency using DNA and mRNA testing for the following: (1) cotesting with cytology in women 30 to 65 years, and (2) triage of women with mild cervical cytological abnormalities (atypical squamous cells of undetermined significance [ASC-US]) in the United States. Screening end point is histologically confirmed high-grade lesions (cervical intraepithelial neoplasia grade 2, 3, or invasive cancer). Sensitivity and specificity estimates of DNA and mRNA testing to detect cervical intraepithelial neoplasia grade 2, 3, or invasive cancer were obtained from 2 published trials: the US Clinical Evaluation of APTIMA mRNA (CLEAR) study for ASC-US triage and the French APTIMA Screening Evaluation (FASE) study for cotesting. Costs of DNA and mRNA testing were assumed identical. Costs of screening, diagnosis, and treatment of cervical neoplasia and cancer were from previously published estimates, adjusted to 2012 US dollars. Inputs were modeled as distributions for Monte Carlo probabilistic sensitivity analysis. Model outcomes were costs per life-year saved for each strategy, discounted at 3% annually.

RESULTS

For both cotesting and ASC-US triage, mRNA testing cost less than DNA testing, whereas life expectancies were widely overlapping. There was a 100% probability that DNA testing was not cost-effective at $100,000/life-year saved threshold for ASC-US triage and a 55% probability that DNA testing was not cost-effective at the same threshold for cotesting.

CONCLUSIONS

Based on the available evidence, mRNA testing for cotesting or ASC-US triage is likely to be more efficient than DNA testing under current US cervical cancer screening guidelines.

Men's Intentions to Engage in Behaviors to Protect Against Human Papillomavirus (HPV): Testing the Risk Perception Attitude Framework

Guided by the risk perception attitude framework (RPA), this study examined men's perceptions of risk and efficacy beliefs as predictors of their intentions to engage in self-protective behaviors. The results of multiple regression analyses did not provide support for the RPA prediction that efficacy beliefs moderate the relationship between risk perceptions and self-protective behavior. However, the results provide support for the main effects of risk and efficacy on all four behavioral intentions examined (i.e., Internet information seeking, communication with a health provider, HPV vaccination, and condom use). Risk and efficacy were positively related to (and significant individual predictors of) all four behavioral intentions. Scholarly and practical implications of these findings are discussed.

Genital Human Papillomavirus Infection Progression to External Genital Lesions: The HIM Study

BACKGROUND

Human papillomavirus (HPV) causes two types of external genital lesions (EGLs) in men: genital warts (condyloma) and penile intraepithelial neoplasia (PeIN).

OBJECTIVE

The purpose of this study was to describe genital HPV progression to a histopathologically confirmed HPV-related EGL.

DESIGN, SETTING, AND PARTICIPANTS

A prospective analysis nested within the HPV Infection in Men (HIM) study was conducted among 3033 men. At each visit, visually distinct EGLs were biopsied; the biopsy specimens were subjected to pathologic evaluation and categorized by pathologic diagnoses. Genital swabs and biopsies were used to identify HPV types using the Linear Array genotyping method for swabs and INNO-LiPA for biopsy specimens.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

EGL incidence was determined among 1788 HPV-positive men, and cumulative incidence rates at 6, 12, and 24 mo were estimated. The proportion of HPV infections that progressed to EGL was also calculated, along with median time to EGL development.

RESULTS AND LIMITATIONS

Among 1788 HPV-positive men, 92 developed an incident EGL during follow-up (9 PeIN and 86 condyloma). During the first 12 mo of follow-up, 16% of men with a genital HPV 6 infection developed an HPV 6-positive condyloma, and 22% of genital HPV 11 infections progressed to an HPV 11-positive condyloma. During the first 12 mo of follow-up, 0.5% of men with a genital HPV 16 infection developed an HPV 16-positive PeIN. Although we expected PeIN to be a rare event, the sample size for PeIN (n=10) limited the types of analyses that could be performed.

CONCLUSIONS

Most EGLs develop following infection with HPV 6, 11, or 16, all of which could be prevented with the 4-valent HPV vaccine.

PATIENT SUMMARY

In this study, we looked at genital human papillomavirus (HPV) infections that can cause lesions in men. The HPV that we detected within the lesions could be prevented by a vaccine.

Effectiveness of a provider-focused intervention to improve HPV vaccination rates in boys and girls

BACKGROUND

HPV vaccination is universally recommended for boys and girls, yet vaccination rates remain low nationwide.

METHODS

We conducted a provider-focused intervention that included repeated contacts, education, individualized feedback, and strong quality improvement incentives to raise HPV vaccination rates at two federally qualified community health centers. To estimate the effectiveness of the intervention, rates of initiation of vaccination, and completion of the next needed HPV vaccination (dose 1, 2 or 3) among boys and girls ages 11-21 were compared at baseline and two follow-up periods in two intervention health centers (n4093 patients) and six control health centers (n9025 patients). We conducted multivariable logistic regression accounting for clustering by practice.

RESULTS

Girls and boys in intervention practices significantly increased HPV vaccine initiation during the active intervention period relative to control practices (girls OR 1.6, boys OR 11; p<0.001 for both). Boys at intervention practices were also more likely to continue to initiate vaccination during the post-intervention/maintenance period (OR 8.5; p<0.01). Girls and boys at intervention practices were more also likely to complete their next needed HPV vaccination (dose 1, 2 or 3) than those at control practices (girls OR 1.4, boys OR 23; p<0.05 for both). These improvements were sustained for both boys and girls in the post-intervention/maintenance period (girls OR 1.6, boys OR 25; p<0.05 for both).

CONCLUSIONS

Provider-focused interventions including repeated contacts, education, individualized feedback, and strong quality improvement incentives have the potential to produce sustained improvements in HPV vaccination rates.

Prevalence of genital warts among sexually transmitted disease clinic patients-sexually transmitted disease surveillance network, United States, January 2010 to December 2011

BACKGROUND

A quadrivalent vaccine that prevents genital warts (GWs) has been recommended by the Advisory Committee on Immunization Practices for women since 2007 and for men since 2011. National estimates of GW burden in sexually transmitted disease (STD) clinic settings are useful to provide a baseline assessment to monitor and evaluate reductions in GW and serve as an important early measure of human papillomavirus (HPV) vaccine impact in this population.

METHODS

Genital wart prevalence among STD clinic patients from January 2010 to December 2011 was determined from a cross-sectional analysis of all patients attending STD clinics in the STD Surveillance Network (SSuN). We conducted bivariate analyses for women, men who have sex with women (MSW), and men who have sex with men (MSM) separately, using χ statistics for the association between GW diagnosis and demographic, behavioral, and clinical characteristics.

RESULTS

Among 241,630 STD clinic patients, 13,063 (5.4%) had GWs. Wide regional differences were observed across SSuN sites. The prevalence of GW was as follows: 7.5% among MSW (range by SSuN site, 3.9-15.2), 7.5% among MSM (range, 3.3-20.6), and 2.4% among women (range, 1.2-5.4). The highest rate was among 25- to 29-year-old MSW (9.8%). Non-Hispanic black women and MSW had a lower prevalence of GWs than did women and MSW in other racial/ethnic groups.

CONCLUSIONS

There is a significant burden of GW in STD clinic populations, most notably in men. Given the opportunity for prevention with a quadrivalent HPV vaccine, STD clinics may be an ideal setting for monitoring trends in GW prevalence among men (MSW and MSM). However, given the observed low GW prevalence among female STD clinic patients, STD clinics may not provide an appropriate setting to monitor the impact of HPV vaccine among women.

Human papillomavirus vaccination uptake and completion as a preventive health measure among female adolescents

BACKGROUND

National coverage for the human papillomavirus (HPV) vaccine falls short of the targeted goals for Healthy People 2020 with disparities in completion rates noted in minority adolescent female populations. The purpose of this study was to provide a review of the literature on HPV vaccination uptake and completion rates among female minority adolescents as well as a discussion of the financial and policy dimensions of HPV vaccination with implications that impact uptake and completion rates.

METHODS

By reviewing the literature, the authors show that the two human papillomavirus (HPV) vaccines, Gardasil and Cervarix, have presented unprecedented opportunities to prevent morbidity and mortality from cervical cancer.

CONCLUSION

The authors recommend that nurses and advanced practice nurses take an active role at the point of care to educate families about HPV vaccination. Nursing interventions for practice changes are provided to improve vaccination initiation and completion rates in disadvantaged populations.

The road ahead for cervical cancer prevention and control

Since the early 1950s, Papanicolaou ("Pap") cytology screening has dramatically reduced cervical cancer mortality in most high-income settings. Currently, human papillomavirus (hpv) vaccination has the greatest potential to reduce the global burden of cervical cancer and precancerous lesions. However, as the prevalence of precancerous lesions declines, maintaining cytology as the primary screening test in settings with established programs might become less efficient. A reduction in test performance (sensitivity, specificity, and positive predictive value) would lead to an increase in unnecessary colposcopy referrals. Fortunately, hpv dna testing has emerged as a suitable candidate to replace cytology. Compared with the Pap test, hpv testing is less specific but much more sensitive in detecting high-grade precancerous lesions, less prone to human error, and more reproducible across settings. Linkage of hpv vaccination and screening registries could serve the added role of monitoring vaccine efficacy. As a triage test, cytology is expected to perform with sufficient accuracy because most hpv-positive smears would contain relevant abnormalities. This approach and others-for example, hpv testing followed by genotyping-are being evaluated in large population studies and have already been recommended in some settings. Other specific biomarkers that might perform well for screening and triage include hpv E6/E7 messenger rna testing, methylation of host or viral genes, and p16(INK4a) staining. Considering the rapid pace of major discoveries and the anticipated arrival of a nonavalent hpv vaccine (currently in phase iii trials), the evidence base in this field has become an elusive target and will continue to be an obstacle for policymakers.

Clinical implications of the cervical Papanicolaou test results in the management of anal warts in HIV-infected women

The Papanicolaou test (or Pap test) has long been used as a screening tool to detect cervical precancerous/cancerous lesions. However, studies on the use of this test to predict both the presence and change in size of genital warts are limited. We examined whether cervical Papanicolaou test results are associated with the size of the largest anal wart over time in HIV-infected women in an on-going cohort study in the US. A sample of 976 HIV-infected women included in a public dataset obtained from the Women’s Interagency HIV Study (WIHS) was selected for analysis. A linear mixed model was performed to determine the relationship between the size of anal warts and cervical Pap test results. About 32% of participants had abnormal cervical Pap test results at baseline. In the adjusted model, a woman with a result of Atypia Squamous Cell Undetermined Significance/Low-grade Squamous Intraepithelial Lesion (ASCUS/LSIL) had an anal wart, on average, 12.81 mm² larger than a woman with normal cervical cytology. The growth rate of the largest anal wart after each visit in a woman with ASCUS/LSIL was 1.56 mm² slower than that of a woman with normal cervical results. However, they were not significant (P = 0.54 and P = 0.82, respectively). This is the first study to examine the relationship between cervical Pap test results and anal wart development in HIV-infected women. Even though no association between the size of anal wart and cervical Pap test results was found, a screening program using anal cytology testing in HIV-infected women should be considered. Further studies in cost-effectiveness and efficacy of an anal cytology test screening program are warranted.

Modifiable influences on female HPV vaccine uptake at the clinic encounter level: a literature review

PURPOSE

A review of the literature to identify modifiable influences on female human papillomavirus (HPV) vaccine uptake relevant to clinical practice in order to support nurse practitioners (NPs) in the prevention of cervical cancer.

DATA SOURCES

PubMed, CINAHL, reference lists of publications that surfaced in the electronic search.

CONCLUSIONS

Six influences are modifiable and potentially amenable to being addressed at the clinic encounter level: (a) cost and insurance coverage, (b) provider recommendation, (c) vaccination opportunity, (d) HPV and HPV vaccine knowledge, (e) vaccine safety concerns, and (f) HPV risk.

IMPLICATIONS FOR PRACTICE

NPs have an important role in improving HPV vaccine uptake and research suggests several areas they can address to increase vaccination during clinic visits.

A brief review of the estimated economic burden of sexually transmitted diseases in the United States: inflation-adjusted updates of previously published cost studies

We conducted a literature review of studies of the economic burden of sexually transmitted diseases in the United States. The annual direct medical cost of sexually transmitted diseases (including human immunodeficiency virus) has been estimated to be $16.9 billion (range: $13.9-$23.0 billion) in 2010 US dollars.

[The first vaccine against cancer: the human papillomavirus vaccine]

The last 20 years is one of the most remarkable periods in the fight against cancer, with the realization that some human papillomaviruses are causally related to cancer and with the development of the vaccine against human papillomavirus infections. This is a historical event in medicine and the prophylactic human papillomavirus vaccines have provided powerful tools for primary prevention of cervical cancer and other human papillomavirus-associated diseases. This is very important as human papillomavirus infection is probably the most common sexually transmitted infection worldwide, and over one million women develop associated cancer yearly, which is about 5% of all female cancers, and half of them die of their disease. Cancers associated with oncogenic human papillomaviruses, mostly HPV16 and 18, include cervical cancer (100%), anal cancer (95%), vulvar cancer (40%), vaginal cancer (60%), penile cancer (40%), and oro-pharingeal cancers (65%). In addition, pre-cancers such as genital warts and the rare recurrent respiratory papillomatosis are also preventable by vaccination. Currently, the human papillomavirus vaccines have the potential to significantly reduce the burden of human papillomavirus associated conditions, including prevention of up to 70% of cervical cancers. Two prophylactic human papillomavirus vaccines are currently available worldwide: a bivalent vaccine (types 16 and 18), and a quadrivalent vaccine (types 6, 11, 16, and 18). Randomized controlled trials conducted on several continents during the last 10 years have demonstrated that these vaccines are safe without serious side effects; they are highly immunogenic and efficacious in preventing incident and persistent vaccine-type human papillomavirus infections, high grade cervical, vulvar and vaginal intraepithelial neoplasia and so on. In addition, the quadrivalent vaccine has been shown to prevent genital warts in women and men. The vaccine is most effective when given to human papillomavirus naive girls. The human papillomavirus vaccines have been incorporated into national immunization programs in 22 European countries. Routine vaccination is recommended for girls aged between 9 and 13 years and catch-up vaccination for females between 13 and 25 years of age. There is no excuse not to incorporate the vaccines into the Hungarian national immunization program. Albeit vaccination is expensive, it is cost-effective in the long run definitely. Anyway, vaccination is a matter of the specialty and the national health program, but not of business. We all are obliged to prevent human suffering.

Patient side cost and its predictors for cervical cancer in Ethiopia: a cross sectional hospital based study

BACKGROUND

Cervical cancer is a leading cause of death from cancer among women in low-resource settings, affecting women at a time of life when they are critical to social and economic stability. In addition, the economic burden is important for policy formulation. The aim of this study is to estimate patient side cost and to determine predictors of its variation for the treatment of cervical cancer.

METHODS

Analytic cross sectional study involving 227 cervical cancer cases at Tikur Anbessa Hospital, Ethiopia was conducted. Cost estimation was based on patients' perspective and using the prevalence-based model as a time frame. Productivity losses were estimated from lost working days.

RESULTS

The mean outpatient cost per patient for cervical cancer was $407.2 (Median = $206.9). Direct outpatient cost (Mean = $334.2) takes the largest share compared with the indirect counterpart ($150). The outpatient cost for half of the respondent falls in a range between $93.7 and $478. The mean inpatient cost for hospitalized patients was $404.4. The average direct inpatient cost was $329 (74% medical costs and 26% non medical costs). The mean value for total inpatient cost for half of the respondents was in the range of $133.5 and $493.9. For every additional day of inpatient hospital stay, there is a daily incremental inpatient cost of $4.2.

CONCLUSION

As has been found in other studies, our findings revealed that cervical cancer creates an immense financial burden on patients. Primary prevention measures, vaccination against HPV and screening, should be initiated and expanded to reduce morbidity from cervical cancer and subsequent costs in both human lives and money resources. Control of co-morbidity and complication should be emphasized during management of cervical cancer patients. Capacitating regional hospitals and provision of low cost or fee exemption schemes should be arranged and strengthened.

Using risk to target HPV vaccines in high-risk, low-resource organizations

Organizations in developed countries with limited financial resources may find it difficult to determine whether it is preferable to use these resources for HPV vaccination, management of HPV-related diseases, or a "hybrid" strategy, such as vaccinating only the highest risk individuals. We determined the organizational costs and clinical impacts of three different organizational approaches to female HPV vaccination in a low-resource setting, including vaccinating everyone, vaccinating no one, or vaccinating only those considered high-risk. To determine patients at highest risk, HPV risk factors were identified using information routinely gathered at the annual preventive maintenance visit. The three vaccination strategies were then compared using a decision tree analysis. The three strategies demonstrated very little difference in cost. However, the least expensive strategy was to vaccinate no one. In contrast, the strategy with the best clinical outcomes was for the organization to vaccinate everyone. Organizations with limited resources must decide how to best allocate these funds to provide the greatest clinical benefits. This study showed little difference in costs but improved clinical outcomes when using the universal HPV vaccination strategy. Thus, the improvement in clinical outcomes when vaccinating everyone may be worth the relatively small increase in cost of vaccinating everyone.