The feasibility of risk-based cervical cancer screening

OBJECTIVE: This study examined the feasibility of risk-based cervical cancer screening in primary care practices in Lansing, Michigan (United States). METHODS: We recruited adult women regardless of the reason for visit from March to June of 2001. Women completed a risk factor questionnaire including number of current and lifetime sexual partners, history of sexually transmitted diseases and smoking. We also explicitly extracted from the patients' medical records: Pap smear results, presence of a sexual history, and screening for sexually transmitted infections (STI). RESULTS: Of 1271 eligible women, 809 (64%) completed the questionnaire and 601 agreed to have their records reviewed. Women of minority race represented 28.6% of the sample and one-third were insured through Medicaid. The mean number of lifetime partners was 9 and average age of first intercourse was 17. Eighty-six percent of women provided complete information. Most women (83%) had at least one risk factor for cervical cancer. We found low rates of documented sexual history taking (54%) and STI testing (4%). CONCLUSION: Women seeking care from a primary care clinician will provide, if asked, sensitive information, making risk-based cervical cancer screening feasible. However, since so many women had at least one identifiable risk factor, multivariate models or alternative approaches to assessing risk need to be developed.     

Barriers to infectious disease care among lesbians

Despite the considerable number of women in the United States who identify as lesbian, few data exist that address lesbians' health needs. The Institute of Medicine emphasized that data on sexually transmitted infections, Pap smear screening, and cervical dysplasia among lesbians were needed to guide clinical practice, policy development, and patient education. Use of surveillance data for this purpose is limited because risk classifications exclude same-gender sex among women or subsume it under behavior considered as higher risk. However, sexual transmission of human papillomavirus, HIV, Treponema pallidum, and Trichomonas vaginalis between women has been reported. Data indicate that lesbians receive routine Pap smear screening less frequently than is optimal. Moreover, lesbians commonly report previous pregnancy, induced abortion, and hormonal contraceptive use. Education of lesbians and their care providers should counter assumptions that sex between women confers no risk for transmission of sexually transmitted infections, and lesbians should receive Pap smears according to current guidelines.     

Beliefs About the Pap Smear Among Mexican Immigrants

Few studies have examined Latinos’ beliefs about the Pap smear or what uses they attribute to the procedure. We conducted qualitative interviews with 28 Mexican immigrant women and 23 Mexican immigrant men recruited through snowball sampling. We found that individuals learned about the Pap smear from a wide variety of sources and often understood the exam to be a screening test for sexually transmitted infections in general. They also related the need for Pap smears and the development of cervical cancer to high risk sexual behaviors. Finally, participants considered men to have a significant role as vectors for disease and as barriers to screening. Our results suggest that interventions to improve cervical cancer prevention among Mexican immigrants may be most effective if they include both men and women and if they recognize and address concerns about STI spread and prevention. Furthermore, interventions must recognize that even when women know how to prevent disease, they may feel disempowered with regard to making behavioral changes that will decrease their risk for STIs or cancer.     

Compliance with Papanicolaou smear screening following tubal ligation in women with cervical cancer

To evaluate patient compliance with Papanicolaou (Pap) smear screening after tubal ligation compared with other methods of birth control in patients who develop cervical cancer, a retrospective review of 262 women with cervical cancer diagnosed at age < or = 70 years was undertaken at the Albert Einstein College of Medicine from January 1987 to December 1995. Demographic data, stage of the disease, histologic type, history of smoking, history of sexually transmitted disease (STD), and birth control use were recorded. The Pap screening history was obtained from all the patients. Women who had a bilateral tubal ligation (BTL) were compared with those who did not have this form of birth control. The date and result of their last Pap test prior to their diagnosis of cervical cancer was noted. Two hundred fourteen women with cervical cancer were evaluable. The clinical stage, mean age, history of smoking, and history of STD were similar for both groups. Gravidity among the BTL group was higher than in the non-BTL group (p < 0.01). Forty-eight (22.4%) women had a previous BTL. Twenty-seven of these 48 patients (56.3%) did not have a Pap smear within 3 years prior to the diagnosis of cervical cancer. Of the 166 patients, 61 (36.7%) did not have a Pap test within 3 years (p < 0.05). Fourteen women (29.2%) in the tubal ligation group never returned for a Pap test following the BTL. An average of 6.2+/-5.9 years elapsed since the last Pap test in the BTL group, with 4.0+/-5.1 years in the nontubal ligation group (p < 0.05). There was a correlation between the number of years since BTL (14.2+/-7.7) to the number of years since the last Pap test (6.2+/-5.9) (p < 0.05). Women who have had a BTL should be considered high risk because of poor screening compliance. A Pap test every 3 years is not adequate in this high-risk population group. We advocate improved counseling regarding the importance of continued annual Pap screening for women who are considering tubal ligation.     

Is a history of trauma associated with a reduced likelihood of cervical cancer screening?

OBJECTIVE: We tested the hypothesis that a history of trauma (especially sexual trauma) was associated with a reduced likelihood of having had medically appropriate cervical cancer screening. STUDY DESIGN: A case-control study using mailed self-report questionnaires. POPULATION: The questionnaires were completed by an age-stratified random sample of adult women members of a large health maintenance organization. The sample included 364 women who had received medically appropriate cervical cancer screening and 372 who had not. OUTCOMES MEASURED: We defined cases as women who, according to their medical record, had not had cervical cancer screening within 2 years before the study. Controls were defined as women who had been screened. We evaluated exposures to trauma that we hypothesized to be associated with the case/control state. RESULTS: Women who had been sexually abused in childhood were less likely to have had a Pap smear within the past 2 years (36.0% vs. 50.4%, P =.050). Other traumatic events were associated with Pap testing in bivariate analyses but not when demographic characteristics and clinic location were controlled. Childhood sexual abuse remained associated with reduced odds of Pap screening in logistic regression analyses that controlled for clinic location, demographics, attitudes about Pap screening, and posttraumatic stress disorder symptoms (adjusted OR = 0.56, 95% CI 0.34 to 0.91). CONCLUSIONS: These findings suggest that childhood sexual abuse may lead to decreased probability of screening for cervical cancer, potentially contributing to the poorer health seen in other studies of women who have been sexually abused.     

Abnormal Pap test results and the rurality factor

Objective: To review the published socio‐cultural determinants that put women in rural areas at greater risk of having an abnormal Pap test result. Design: Literature review. Conclusion: An Australian woman is at increased risk of developing cervical dysplasia if she lives in a rural area, identifies as an Indigenous Australian or is from a non‐English speaking country. Being aged over 50 years, increases the risk of cervical cancer but not cervical intra‐epithelial neoplasia (CIN) 1, which peaks in the 20–24 year age group. Other connections with cervical dysplasia relate to a woman or her partner's sexual history, her nutritional status and possibly even her personality type. Smoking, social isolation, high negative life change events and having lived a ‘troubled’ life are all identified in the literature as increasing a woman's risk of having an abnormal Pap test result. Receiving an abnormal Pap test result often leads to feelings of fear, anxiety, guilt, shock, vulnerability, powerlessness, depression, shame and feeling dirty for the woman concerned. Compounding these negative feelings are social, practical and financial difficulties that have to be addressed. It is argued that social and medical models of health must complement each other to improve the well being of rural women experiencing an abnormal Pap result. What is already known: Innumerable studies have verified that cervical screening significantly reduces the incidence of cervical cancer and the Pap test is promoted as a tool to prevent cervical cancer. However, preventative strategies used in addition to cervical screening have rarely been considered in the literature. What this study adds: This review concludes that optimum health outcomes for rural women are realised when socio‐cultural considerations are articulated with cervical screening programs. It suggests possible strategies for practitioners to use to use to help reduce the incidence and impact of cervical pathology for rural women.     

Cervical cancer screening among Latinas: the importance of referral and participation in parallel cancer screening behaviors

Low cancer screening participation among medically underserved Latinas is largely due to lack of active referral to screening procedures by health care providers. We explored how physicians' referral and instruction on parallel screening procedures discriminates Latinas' cervical cancer screening practices in the context of relevant variables such as sociodemographic characteristics, health insurance, history of cancer, and level of acculturation. Of 153 women surveyed, 100 were compliant with yearly Pap smear while 53 were not compliant. Discriminant function analysis revealed that health care provider interventions and parallel breast cancer screening behaviors were significant discriminators between women who obtained a Pap smear within a year and those who were less compliant. A change in public health policy that facilitates to medically underserved Latinas access to reliable sources of health care referrals and services might increase their regular use of cervical cancer screening, which could potentially result in a reduction in cancer treatment costs and in lives lost to cervical cancer among these women.     

Relative and attributable risk for cervical cancer: a comparative study in the United States and Italy

The attributable risk for invasive cervical cancer in the US and Italian populations has been estimated in relation to main 'aetiological' factors (number of sexual partners, age at first intercourse, parity, oral contraceptive use and smoking) and history of Pap smear using data from two case-control studies conducted in the US (466 cases and 788 controls) and Italy (528 cases and 456 controls). The risk of cervical cancer increased in both studies with multiple sexual partners, decreasing age at first intercourse, higher parity, oral contraceptive use and smoking. Levels of exposure to various risk factors were markedly different in the two countries (ie number of sexual partners, frequency of oral contraceptive use and smoking were greater in the US). Multiple Pap smears and a short interval since last Pap smear strongly reduced risk of cervical cancer in both populations, although screening was much more widespread in the US study population, with only 9% of controls reporting no previous smear versus 38% of the Italian control series. The combined population attributable risk for the five 'aetiological' risk factors was slightly greater in the US study (76%) than in the Italian one (69%), chiefly because of a higher prevalence of exposure to sexual factors in US study women. A substantially larger proportion of Italian cases were due in part to deficiency in screening (46% in US and 84% in Italy). Thus, further inclusion of the effect of screening programmes (number of Pap smears and time since last Pap) led to an overall proportion of cases attributable to the examined risk factors of 87% in the US and 95% in Italy.     

Variation in the duration of protection given by screening using the Pap test for cervical cancer

The duration of protection offered by Pap screening for cervical cancer was examined using data on 101 cases of invasive cervical cancer and 396 controls from a Maryland case-control study. Receipt of a Pap test up to 4 years ago afforded significant protection, compared to women screened 11 or more years ago, or never screened. Smoking, intercourse before age 19, and a history of sexually transmitted disease were significant risk factors for cervical cancer; barrier contraception use was protective. Variation in protection from Pap screening was examined by age, race, age at first intercourse, barrier contraception use, and source of last Pap test (obstetrician-gynecologist vs other provider type). Results showed older women, women with earlier age of first intercourse, and non-users of barrier contraception received slightly less protection from Pap tests, while women who received their last Pap test from an obstetrician-gynecologist received significantly more protection than women who did not. Issues of quality of screening and follow-up are discussed in regard to these results.     

HPV检测技术初筛巴氏涂片分流应用于农村女性宫颈癌筛查效果

目的 分析人乳头瘤病毒（human papillomavirus,HPV）检测技术初筛巴氏涂片分流应用于农村女性宫颈癌筛查中的效果。方法 2015年对35~64岁农村女性使用HPV检测进行宫颈癌初筛,阳性者采用巴氏涂片法分流,巴氏涂片结果为不明确意义的非典型鳞状细胞（atypical squamous cells of undetermined signification,ASC-US）及以上病变的女性转用阴道镜检查。所有阴道镜下检查异常或不满意处均取活检或宫颈管搔刮术（endocervical canal curettage,ECC）,病理结果为中度子宫颈上皮内瘤变（cervical intraepithelial neoplasia grade 2,CIN2）及以上者转诊进行手术治疗。结果 HPV初筛、巴氏涂片分流策略HPV筛查阳性率为10.65%。CIN2及以上者共150人,全部进行阴道镜检查,实际阴道镜转诊率为3.55%,阴道镜顺应性为100%。经病理诊断,本次筛查分别发现轻度子宫颈上皮内瘤变（cervical intraepithelial neoplasia grade 1,CIN1）、CIN2及以上、重度子宫颈上皮内瘤变（cervical intraepithelial neoplasia grade 3,CIN3）及以上分别为16例（0.38%）、29例（0.69%）、15例（0.36%）,未发现宫颈癌病例。结论 HPV初筛、巴氏涂片分流策略能够降低阴道镜转诊率,宫颈疾病检出率较高,可以在有条件的农村地区使用。但宫颈癌前病变及宫颈癌的检出率较HPV初筛不分流低,需要进一步加强对基层细胞学医生技术水平的规范化培训。     

Sentinel Pap smears in 261 invasive cervical cancer patients in Italy

Although cervical cytology screening has dramatically reduced its incidence, cervical cancer still occurs. The clinical history of 261 cervical cancer patients referred to the European Institute of Oncology between 1996 and 2006 was analysed in depth to better understand the difficulties in the diagnosis and prevention of this neoplasia in Italy. Data concerning anagraphical characteristics, tumour type and stage, Pap smear history, colposcopic and histologic data, treatment outcome were reviewed. Patients who had taken Pap smear in the 3-year time span preceding diagnosis were 199 and 55 (27.7%) of these smears were negative. A negative Pap smear was observed in 62.5% of the women with a cancer at stage IV or III. One hundred and seventy-two patients were symptomatic at diagnosis: 43 (25%) had a negative Pap smear in the 3 years preceding diagnosis while 54 (31.4%) had never done a Pap smear or had one taken more than 3 years before. Eighty-nine women were asymptomatic at the time of diagnosis; 13 patients (14.6%) had a negative Pap smear while 8 had no smear taken in the 3 years preceding diagnosis or no smear at all. The present retrospective investigation indicates that the screening system still has some critical points. Although multiple techniques and approaches have been proposed to improve the general performance of the system, prophylactic vaccination may dramatically limit the failures in an easier, and possibly more cost-effective way. We also stress that history taking and clinical examination are important tools to diagnose cervical cancers. However a clinical diagnosis requires experience, which, with the advent of more efficient screening system and prophylactic vaccination, many of the newer practising gynaecologists might lack.     

Cervical cancer screening among Lebanese women

Background

Cervical cancer is a very common malignancy amongst women worldwide. Pap smear is an effective and inexpensive screening test in asymptomatic women. The aim of this paper was to assess the prevalence of Pap smear screening for cervical cancer among Lebanese women and to determine associated sociodemographic and psychosocial characteristics.

Demographic predictors of mammography and Pap smear screening in US women.

OBJECTIVES. Proven screening technologies exist for both breast and cervical cancer, but they are underused by many women. We sought to evaluate the effect of demographic characteristics on the underuse of mammography and Pap smear screening. METHODS. We analyzed responses from 12,252 women who participated in the 1987 National Health Interview Survey Cancer Control Supplement. Demographic profiles were produced to target severely underserved groups of women. RESULTS. Low income was a strong predictor of mammography underuse, as was Hispanic ethnicity and other race, low educational attainment, age greater than 65, and residence in a rural area. A strong predictor of never having had a Pap smear was never having been married; however, the importance of this characteristic is difficult to interpret in the absence of data on sexual activity. Hispanic women and women of other races of all ages and all income levels underused Pap smear screening, as did older women, particularly older Black women. CONCLUSIONS. The tendency of women to underuse screening technologies varies greatly across levels of basic demographic characteristics. The importance of these characteristics differs for mammography screening versus Pap smear screening.     

Limited Pap screening associated with reduced risk of cervical cancer in South Africa

BACKGROUND: We investigated the effect of Pap smear screening on the incidence of invasive cancer of the cervix in the Western Cape, South Africa where screening is limited. METHODS: Data were derived from a case-control study of the association of hormonal contraceptives and invasive cervical cancer. Incident cases (n = 524) of invasive cervical cancer who presented at two tertiary hospitals and controls (n = 1540) series matched for age, race, and place of residence were interviewed. Information on a wide range of variables was collected including whether the women had previously had a Pap smear taken and the number and timing of smears. Odds ratios (OR) and 95% CI were calculated using multiple logistic regression. RESULTS: The OR of cervical cancer was reduced among women who had ever had a smear (OR = 0.3, 95% CI: 0.3-0.4). The OR declined with increasing number of smears to 0.2 for >/=>3 smears (trend P = 0.0003). Among women who had a smear <5 years previously the OR was 0.3, but even if the smear was taken >/=15 years previously the women remained at reduced risk (OR = 0.5). CONCLUSION: The data suggest that even limited Pap smear screening reduces the risk of cervical cancer. Should a screening programme be successfully implemented, the incidence of cervical cancer might be reduced by as much as 70%.     

Coverage and focus of a cervical cancer prevention program in southern Brazil.

OBJECTIVE: To determine the coverage and focus of cervical cancer screening (Pap smears) in a population-based sample in Brazil. METHODS: Cross-sectional cluster survey covering 1730 women aged 20 years or older with a history of sexual activity. Information was collected on social, demographic and behavioral variables, knowledge of and use of the Pap test. RESULTS: Of women aged 25-59 years, who are the target population of the national cervical cancer screening program, 78.7% had had at least one Pap test in their lifetime, and 68.8% had had a Pap test in the last 3 years. Statistics for focus of the program showed that of the 637 women who reported having a Pap test in the last year, only 20.6% actually required one. The remainder were either outside the age range or had had another test less than 30 months previously. Prevalence of not having been tested in the previous 3 years was highest among black (41.7%) and low-income women (64.3%), and among those at greatest risk for cervical cancer (62.3% for women with three or more risk factors). Focus was inversely related to socioeconomic status. CONCLUSION: Coverage rates were similar to those reported in other national studies, but this is the first report to examine the focus of the national program. We show that 8 of every 10 Pap tests were not necessary. Coverage levels remain unacceptably low among women of low socioeconomic status and those at greatest risk for cervical cancer.     

Risk factors for invasive cervical cancer and reduction of risk by 'Pap' smears in Thai women

A case-control study of invasive cervical cancer was conducted in Siriraj Hospital, Thailand, as part of a WHO-sponsored collaborative study of neoplasia and steroid contraceptives. Data from 189 histologically confirmed cases and 1023 randomly selected hospitalized controls who were recruited from October 1979 through March 1983 were analysed to identify risk factors for cervical cancer in Thai women, and to assess the effectiveness of Papanicolaou smears (Pap smears) in preventing invasive cervical cancer in Thailand. Variables that distinguish women at significantly increased risk of invasive cervical cancer, to whom preventive programmes should be directed, include a history of treatment for abnormal vaginal discharge (an indicator of vaginal or cervical infection), a history of venereal disease, and little or no education (an indicator of low socioeconomic status). Risk of invasive cervical cancer decreased significantly as the frequency of Pap smears increased, and was reduced by 75% in women who had at least one Pap smear per year.     

Duration of relative protection of screening for cervical cancer

The reduction in cervical cancer among women with at least one previous negative Pap smear can be assessed in terms of the time elapsed since the last smear was taken. One indicator of the utility of screening is the duration of relative protection, commonly calculated as the inverse of the disease odds ratio. Most investigations of the extent of relative protection provided by Pap testing have relied on data from centrally organized screening programs or case-control studies. For geographic areas without mass screening programs or tumor registries, reliance on subject recall of Pap tests is required. We conducted a case-control investigation of cervical cancer and interviewed 153 Maryland women with invasive disease and two control groups: 153 case-nominated controls and 392 randomly selected controls. The duration of relative protection of screening for disease was 4-6 years for both control groups [relative protection (RP) = 4.30, 95% confidence interval (CI) = 1.5-12.7 for neighborhood controls, RP = 3.63, 95% CI = 1.4-9.6 for random controls]. These findings held after adjusting for education, ever treated for a sexually transmitted disease, smoking, age at menarche and at first sexual intercourse, number of pregnancies, lifetime contraceptive use, and utilization of obstetrician-gynecologist services; the RPs increased upon adjustment. However, there was a decline in the RP with increased duration. Our findings are directly comparable to reports where smears have been verified, suggesting that self-reports of previous tests may be reliable as a method to evaluate the utility of screening.     

Cervical cancer screening beliefs among young Hispanic women

OBJECTIVES: This study examined beliefs, attitudes, and personal characteristics that correlated with self-reported cervical cancer screening history among Hispanic women aged 18 to 25 years old in El Paso, TX, a large metropolitan area on the U.S.-Mexico border. METHODS: Data were collected through a cross-sectional, face-to-face survey. The study questionnaire was based primarily on the Health Belief Model, and included scales that measured perceived susceptibility and seriousness of cervical cancer, and perceived benefits and barriers to Pap test screening. The study questionnaire also included measures of acculturation, Pap test history, pregnancy and sexual history, use of birth control, type of medical insurance, and educational attainment. RESULTS: Sixty-nine percent reported ever having had a Pap test and 56% reported having had a test in the past year. Eighty percent reported that they were sexually active, and of these, 63% reported using birth control. Respondents understood the seriousness of cervical cancer, their susceptibility to cervical cancer, and the benefits of Pap testing; however, only 61% agreed that most young women whom they know have Pap tests. Greater acculturation and the belief that most young unmarried women have Pap tests were positively associated with ever having screening. The perception that the test would be painful and not knowing where to go for the test were negatively associated with ever having a Pap test. CONCLUSIONS: This study found suboptimal rates of screening for cervical cancer in a sample of young Hispanic women residing along the U.S.-Mexico border. Although women may understand the seriousness of cervical cancer and the benefits of screening, perceptions about Pap tests may pose barriers to undergoing screening. Efforts to increase screening also may need to focus specifically on women who are least acculturated, as they also were least likely to have had prior Pap tests.     

Pap smear use in California: are we closing the racial/ethnic gap?

BACKGROUND: Minority women continue to be disproportionately affected by cervical cancer. Minority population groups at high risk for cervical cancer may be failing to fully comply with screening recommendations. The use of Pap smears among women in California was evaluated to identify ethnic groups at higher risk for noncompliance with cervical cancer screening. METHODS: Cross-sectional analysis of 2001 California Health Interview Survey data. Logistic regression was used to assess the independent contribution of race/ethnicity to the use of Pap smears. RESULTS: Hispanic (aPR = 1.03, 95% CI 1.02-1.05) and Black (aPR = 1.03, 95% CI 1.001-1.06) women are more likely to report a Pap smear in the past 3 years as compared to White women. Asians were the least likely to report cervical cancer screening despite a more favorable sociodemographic profile. Screening rates varied among Hispanic or Asian subgroups; Mexicans, Vietnamese, Chinese, and South Asians are particularly underserved. CONCLUSIONS: In contrast to the country as a whole, Hispanic women in California are more likely to report a recent Pap smear as compared to White women. However, racial/ethnic disparities in Pap smear use persist; Asian women are the least likely to report cervical cancer screening as compared to any other group.     

Understanding the Role of Violence in Incarcerated Women's Cervical Cancer Screening and History

In this exploratory study the authors investigated characteristics, including reported experiences of violence, related to incarcerated women's self-report of cervical cancer screening and cancer history and treatment. During a four month period in 2010, 204 women in Kansas City jails were surveyed. Multiple logistic regression models were used to examine the relations of socio-demographic and community characteristics and history of violence among the women to their cervical cancer screening, diagnosis, and treatment histories. Forty percent of the women in the current sample reported abnormal Pap histories, though only 6% of all Pap smears done in the U.S. are abnormal. Women who reported abuse histories in this study were found to be more likely to report having ever had an abnormal Pap smear (for physical abuse Odds Ratio [OR] = 6.05; CI 2.36, 15.54 and for past year intimate partner violence OR = 2.41; CI 1.09, 5.31). Participants who did not fear neighborhood violence were less likely to report an abnormal Pap history (OR = 0.57; CI 0.34, 0.96) and more likely to visit a family doctor for their Pap screenings (OR = 1.91; CI 1.01, 3.60). Women who perceived greater neighborhood violence had increased odds of reporting that they received Pap screenings in a hospital setting (OR = 1.47; CI 1.08, 2.00). Frequency of Pap screening did not differ in women who did and did not have fear of neighborhood violence. This study highlights the heightened cervical cancer risk experienced by women with criminal justice histories and suggests that violence at several levels has implications for cervical cancer prevention for these women.