Knowledge, attitudes, and practices toward cervical cancer prevention among women in Kampong Speu Province, Cambodia

Background There is little information concerning the preventive behaviors against cervical cancer among women in Cambodia, a country without organized cervical cancer screening programs and national human papillomavirus (HPV) vaccination policies. We aimed to examine the cervical cancer knowledge, attitudes, and practices as well as cervical cancer prevention methods among Cambodian women. Methods A community-based cross-sectional survey on cervical cancer prevention was conducted. We conducted a face-to-face interview survey for women aged 20–69 years who lived in Kampong Speu Province. The data collection was conducted by a nurse and a trained health worker using a structured questionnaire from January 8 to February 19, 2016. The questionnaire comprised 46 questions on demographic and reproductive characteristics, knowledge of cervical cancer, related risk factors and preventive methods, and attitudes toward and practices of Pap test and HPV vaccination. A logistic regression analysis was used to evaluate the relationship between preventive behaviors against cervical cancer and related factors such as age, education, income, and knowledge of cervical cancer. Results Among the 440 respondents, 74 and 34% of women had heard about cervical cancer and the Papanicolaou (Pap) Smear test, respectively, and 7% of women had ever been screened by a Pap test. The participants showed high willingness to undergo a Pap test (74%). Furthermore, 35% of women were aware that cervical cancer is preventable by vaccination and 62% of women were willing to get the HPV vaccine, but only 1% of women had been vaccinated against HPV. Women of a younger age (odds ratio: 76.7; 95% confidence interval: 19.2–306.5 among women aged 20–29 years compared to 60–69 years, P-for-trend< 0.0001) and those who were married (odds ratio: 2.8; 95% confidence interval: 1.3–6.3) were more likely to be willing to receive the vaccination. Conclusions Women in the Kampong Speu province of Cambodia had a low awareness of cervical cancer screening and rarely practiced cervical cancer screening. However, the willingness to get Pap test and HPV vaccination is high.


Background
Cervical cancer is one of the most common cancers in women worldwide and an important reproductive health problem in women. Approximately 85% of the global burden of cervical cancer occurs in less-developed regions, where it accounts for almost 12% of all cancers in women [1].
The prevalence of human papillomavirus (HPV), an important cause of cervical cancer, is higher in lessdeveloped countries than in more-developed regions [2,3]. The majority of deaths due to cervical cancer occur in women who were never screened or treated as well as those who had an early sexual debut, a history of multiple sexual partners, and a high number of live births [4]. Strong evidence shows that the progression of cervical cancer into its later stages can be prevented through screening and treatment of premalignant lesions. Thus, in developed countries, the incidence of cervical cancer has been controlled due to effective screening programs, especially the systematic use of the Papanicolaou (Pap) smear test for identifying premalignant changes in the cervix [5]; however, in many developing countries, screening services are lacking or are poorly accessible for the majority of the population [6]. In Cambodia, a country with medium human development [7], cervical cancer is the most-common cause of cancer in women. There is no data registry for cancer in Cambodia, the cancer incidence and mortality rates are estimated from those of neighboring countries or registries in the same area (i.e., Vietnam and Thailand) [8]. In 2012, the age-standardized incidence and mortality rate of cervical cancer were 23.8 and 13.4, respectively, rates that are 3 times higher than those in Singapore [9]. The majority of women affected with cancer in Cambodia present to the clinic/hospital with an incurable advanced clinical stage of disease, which often has a very poor prognosis, eventually resulting in death [10]. In Cambodia, there are no quality data on the cancer burden and no systematic cervical cancer-screening programs and national or governmental HPV vaccination policies [11]. Furthermore, there is little information available on the preventive behaviors against cervical cancer among women in Cambodia. Therefore, this study aimed to investigate the knowledge, attitudes, and practices (KAP) toward cervical cancer screening and HPV vaccination by conducting a KAP survey in a rural area in Cambodia.

Study participants
A community-based cross-sectional KAP survey on cervical cancer prevention was conducted for women aged 20-69 years in Kampong Speu Province, Cambodia, between January 8 and February 19, 2016. Kampong Speu is a rural area located in the southwestern part of Cambodia with 8 districts: Aural, Baset, Chbar Mon, Kong Pisei, Phnom Srouch, Samraong Tong, Thpong, and Udong. Most people living in Kampong Speu belong to the low-and middle-income groups, and the main economic activities in the province are agriculture and industry. For each district, we aimed to interview an equal number of participants in each age category (i.e., 20-29, 30-39, 40-49, 50-59, and 60-69 years). In each district, streets were chosen at random and houses were visited sequentially until the predetermined number of surveys was completed. A face-to-face interview survey of female household members was conducted by trained interviewers using a structured questionnaire. We developed the KAP questionnaire to use in this study. An English version of the questionnaire was developed and it was translated into Khmer version. The English and Khmer versions of the questionnaire were pre-tested in a small group of women before survey to validate and modify the questionnaire. Women who had a hysterectomy or a history of cancer as well as women who were not mentally fit to answer the questions were excluded from the survey. After excluding 5 women who were not eligible for the survey among 445 in total contacted women, 440 women completed the interview. All study participants provided written informed consent before the survey. This study was approved by the National Ethics Committee for Health Research in Cambodia.

Measures
The questionnaire comprised 46 questions on demographic and reproductive characteristics, knowledge of cervical cancer, related risk factors and preventive methods, and attitudes toward and practices of Pap test and HPV vaccination. Demographic characteristics included age, education level, occupation, family monthly income, and marital status. Reproductive characteristics included number of children, family history of cervical cancer, history of sexually transmitted diseases and contraceptive use, number of sexual partners, and smoking and alcohol habits. In addition, knowledge of cervical cancer and related risk factors, Pap test, HPV vaccination, source of information, and health-seeking behavior were also measured. To understand women's attitudes and practices, questions focusing on 5 concepts were adapted from the Health Belief Model: perceived severity, perceived susceptibility, perceived benefits, perceived barriers, and cues to action.
For data collection through the survey, most of the questions were close-ended, i.e., the responses were limited to "Yes," "No," and "I do not know," and some questions had multiple-choice responses. To obtain additional opinions, open-ended questions were also used. The responses to the open-ended questions were categorized into the most relevant pre-existing choices.

Statistical analysis
Categorical variables are presented as numbers or percentages. Differences in distribution were identified using the Pearson chi-square test. A logistic regression analysis was used to evaluate the relationship between preventive behaviors (i.e., Pap test or HPV vaccination) against cervical cancer and related factors such as age, education, income, and knowledge of cervical cancer. Odds ratios (ORs) and 95% confidence intervals (CIs) were also calculated. All analyses were carried out using SAS (version 9.3; SAS Institute, Cary, NC). Table 1 shows the socio-demographic and reproductive characteristics of the respondents. Among the respondents, most women had a low education level (75% with no education or primary school education), worked as a farmer or in fisheries (41%), and earned a low or modest level of income (93% with monthly family income under 375 US dollar). Most women were married (81%) with 3 or more children (67%), were non-smokers (99%), were non-alcohol drinkers (79%), and had 1 or 2 sexual partners (94%). Table 2 shows women's KAP toward cervical cancer and the Pap test. Most women had ever heard about cervical cancer (74%), but a limited number of women had ever heard about the Pap test (34%). Many women (46%) were aware that having multiple sex partners is a risk factor for cervical cancer, but only 2% of women were aware that HPV infection too was a risk factor for cervical cancer. Many women (85%) were aware that cervical cancer is a serious disease, but only 7% of women ever underwent a Pap test, as they had no symptom and believed that the Pap test was not necessary. Further, 74.3% of women were willing to undergo a Pap test. After adjustment, our results showed that women of younger age (P for trend < 0.001) and with knowledge of the Pap test (OR = 1.8; 95% CI: 1.0-3.1) were more likely to be willing to undergo a Pap test (Table 4). Table 3 shows women's KAP towards HPV infection and vaccination. Few women (8.6%) were aware that HPV infection is transmitted by sexual contact, and 35.2% of women were aware that cervical cancer is preventable by vaccination. Only 6 women (1.3%) received an HPV vaccination and 62% of women were willing to receive vaccination for themselves as well as their daughters. The high cost of vaccination and lack of knowledge about the vaccine were the most important barriers to HPV vaccination. Women of a younger age and those who were married were more likely to be willing to receive the vaccination (Table 4).

Discussion
In Cambodia, cervical cancer is the most-common cause of cancer in women. There is no data registry for cancer in Cambodia, the cancer incidence and mortality rates are estimated from those of neighboring countries or registries in the same area (i.e., Vietnam and Thailand).  [8]. The mortality was estimated from national cancer incidence estimates using modeled survival. In 2012, the estimated age-standardized incidence and mortality rate of cervical cancer in Cambodia were 23.8 and 13.4, respectively [9]. In many developing countries, women's knowledge of cervical cancer and preventive measures is limited. In addition, the screening rate of cervical cancer is low in low-income countries. For example, studies have reported that only 13-29% of women in North Korea [12] and 28% in Gabon [13] are aware of cervical cancer screening, and 15% of women in India [14], 26% in Malaysia [15], 32% in Nepal [16], and 36% in Thailand [17] are aware of the HPV vaccine.
In this study, 74% of study women living in Kampong Speu, Cambodia, had ever heard about cervical cancer, 34% of women had ever heard about the Pap test, and only 7% of women ever underwent a Pap test. These findings show that the level of knowledge about cervical cancer screening remains low among this population, which can explain why most patients with cervical cancer present to the clinic late with an advanced stage of disease. Education the public about the cervical cancer is low. Cultural norms often prevent women from speaking up or seeking treatment if they do not have any symptoms. Women get a screening at local health centers, but must be referred to a district hospital for treatment. Both primary national hospitals offering oncology treatment are located only in capital, Phnom Penh [10].
In this study, we also found that 39% of respondents listed the city media (radio/television), followed by medical staffs/hospital (10%), as their source of information of the Pap test. In addition, a majority of the participants  reported having either a radio or television in their homes, which shows that the media plays an important role in disseminating health educational information.
Therefore, there is need for a health-education program about cervical cancer that incorporates the media through diverse channels; such a program could be very impactful. Furthermore, given that the second mostcommon source was hospitals/medical staff, access to healthcare should be improved in the future. According to a WHO's report, the availability of public health facilities has increased in Cambodia. There have been significant increases in the proportion of women attending antenatal care visits, and delivering at health facilities [18]. Improved availability of and demand for skilled maternity care can be an opportunity to provide information on Pap test. With regard to risk factors, 47 and 2% of women reported multiple sexual partners and HPV infection, respectively, as the most important risk factors of cervical cancer. According to a systematic review, which included 39 studies across 11 countries, overall knowledge of the general public about HPV infection is poor, and the findings support our results [19].
In general, the poor uptake of the Pap test could be explained by the fact that people worldwide do not usually undergo health checkups until they experience health problems; therefore, the absence of systematic and active promotion of a screening program in the country may contribute to low utilization of the Pap test. Furthermore, in Cambodia, there is no organized cervical cancer-screening program. Although HPV vaccination has been introduced into two provinces -Svay Rieng and Siem Reap -as part of the demonstration project very recently, they have not been implemented in the national immunization program [11]. In addition, healthcare resources for screening, evaluating, and treating abnormal cases (including trained health personnel, hospitals, and clinics for quality cytological testing) are limited in Cambodia. Nevertheless, this study shows that the women of Cambodia were highly willing to undergo the Pap test (74% of the participants). We did not provide an active education in Pap test during the survey. However, the respondents came to know about Pap test through the survey (informed consents and introduction to the study purpose, etc). The study participants had little chance to meet health workers so they gladly consulted the interviewers who are trained nurses about their health issues. Although the knowledge on cervical cancer and preventive measures were low, their willingness to prevent disease was so high. Therefore, interventions should be targeted toward improving access to screening for cervical cancer. Further, 52% of women were not aware that the Pap test should be performed regularly and believed that it is needed only when a symptom appears or once in a lifetime at any age. This misconception may help explain the low uptake of the Pap test (7%) among women in this study,  and it is critical to raise awareness regarding the importance of regular screening in this population. HPV vaccination can be an effective method to prevent cervical cancer, especially in a country with limited healthcare resources for screening and treatment. In this study, 35% of women were aware that cervical cancer is preventable by vaccination and 62% of women were willing to receive the HPV vaccine, but only 1% of women had been vaccinated against HPV. The willingness to vaccinate HPV vaccine to their girls was also high (62%). However, high cost and lack of knowledge of HPV vaccination were the biggest barriers to vaccination in this study. Therefore, in order to increase the vaccine coverage in Cambodia, it is important to increase awareness of the HPV vaccine and decrease the cost of the vaccine to make it affordable.
According to the United Nations Population Fund (UNFPA), HPV vaccine was introduced into the routine immunization system in Cambodia since 2017, starting with the two provinces -Svay Rieng and Siem Reap as part of the demonstration project. A total of 4850 girls aged 9-year old residing in Svay Rieng province will receive 2 doses of the vaccine free of charge from health centers and through outreach activities to schools and health centers. The first dose was offered in January while the second dose took place in July 2017. GAVI, the Vaccine Alliance has provided financial support to purchase the HPV vaccine while WHO, UNICEF, UNFPA and other stakeholders have actively advocated for its inclusion into the national vaccination program [19].
Despite our important findings, this study has a several potential limitations. First, the sample size was modest (N = 440), and the results from this study cannot be generalized to all Cambodian women. According to census data in 2008, the actual proportion of women in the study area is high in young age group (20-29 years old) and decreases followed by age. However, in considering with statistical power in old age groups which are more affected age group by cervical cancer, same number of study participants (i.e. oversampling in old age groups) was recruited in each age category. Second, some of the questions might be leading. For example, "Do you think cervical cancer can be detected early by screening?" may lead more positive answer than a more neutral question such as "Can cervical cancer be detected through screening?" The questionnaire was asked in Cambodian language, Khmer, and the actual meaning and tone might vary by interviewer. Third, some of the confidence intervals in the results are very wide because of the small sample size. When interpret the results with large confidence interval, p-for-trend should also be considered. Lastly, some respondents may not be able to clearly distinguish between gynecological examination and a Pap test, and the frequency of the Pap test may have been overestimated. Thus, large-scale studies among Cambodian women regarding KAP toward cervical cancer prevention are needed in the future.
Nonetheless, this study has many strengths. For example, this is the first study conducted in the community to investigate women's KAP toward cervical cancer prevention in Cambodia. In addition, this study also had a very high response rate (100%). This is most likely because the women contacted had an opportunity to receive advice about their health concerns from trained health personnel, and the

Conclusions
In conclusion, this study showed that women in the Kampong Speu province of Cambodia had a low awareness of cervical cancer screening and rarely practiced cervical cancer screening. However, the willingness to get Pap test and HPV vaccination is high. Developing strategies and implementing effective programs for cervical cancer prevention in the resource-constrained setting are needed.