Assessment of knowledge, attitude, and practices toward prevention of hepatitis B infection among medical students in a high-risk setting of a newly established medical institution

Introduction

Hepatitis B infection is an ancient disease from the times of Bronze Age[1] which had been suspected as an agent of infection in the 50s which was later reported first as Australian antigen in the 60s,[2] and subsequently discovered under the electron microscope in the 70s.[3] Vaccination for hepatitis B was introduced in the 80s.[4]

Hepatitis B is a major public health problem as one-third of the world population is infected with hepatitis B virus (HBV).[56] Based on the prevalence of hepatitis B surface antigen (HBsAg), different areas of the world are classified as having high (≥8%), intermediate (2%–7%), or low (<2%) HBV endemicity.[7] India is in the intermediate HBV endemicity zone (HBsAg prevalence among the general population ranges from 2% to 8%) with 50 million cases which makes it the second largest global pool of chronic HBV infection.[89]

Among the health-care workers (HCWs), seroprevalence is two to four times higher than that of the general population.[10] They remain at risk of acquiring HBV infection mainly through percutaneous or mucosal exposure to infected blood or body fluids.[11] India contributes to 25%-30% of the global injection load, as injections are overprescribed, often to satisfy the whims of the general population which thinks injections are more efficacious than oral route, and unsafe injection practices are common.[121314] A 2-year surveillance study from India even reported that 59/255 (23.13%) of HCW had needlestick exposure.[15] This high prevalence of infection transmission can be largely attributed to careless handling of infectious material, inadequate sterilization of medical equipment, and improper waste disposal.[1617] The risk might be even greater if the HCW is a trainee, intern, or just a student as they have lack of experience, insufficient training, or plain carelessness.[1819]

Hepatitis B infection transmission chain can be interrupted through vaccination, using of safety precautions while handling infectious material, proper sterilization of medical equipment, and legit waste handling.[20212223] However, the studies have indicated that there is a clear gap of knowledge among trainees of health profession toward the risks of occupational exposure to HBV infection.[2425]

In India, hepatitis B vaccine was launched in 2003 along with a birth dose within 24 h which was expanded to the whole country in 2008.[26] Complete vaccination confers immunity for at least 20 years. Hepatitis B is a DNA virus and is much stable than other RNA virus such as influenza and no mutation has been reported. Thus, hepatitis B can be eliminated if coverage of vaccination is expanded across all ages. Most of the Indian subcontinent population born before 2008 has not received hepatitis B vaccination except few who might have availed from the private sector, currently, the proportion of population engaged in high-risk environments such as the health-care sector hails from this cohort of population. In a resource-limited settings of a low- and middle-income country like India, The current World Health Organization (WHO) guidelines advocate to implement hepatitis B vaccination coverage programs to be tailored within the existing facilities and platforms of medical institutions, national programs, workplaces, government schools, offices, etc., for opportunistic vaccination drives.[2728]

The study institute is a newly established Medical Institution under the Government of National Capital Region of Delhi since 3 years, wherein the department of community medicine organized a vaccination program for hepatitis B for the newly admitted MBBS students with a goal of conferring immunity against hepatitis B infection before the students are exposed to high-risk environments later during their internships and career. This study has been conducted in congruence of the hepatitis B vaccination program to shed some light on the knowledge, attitude, and practices (KAPs) of medical students toward occupational exposure to this disease.

Materials and Methods

This is a cross-sectional study that was conducted from March to April 2018 in the confines of the most recent medical college of the capital of the country. Only two batches (1^st year or second semester and 2^nd year or fourth semester) of medical students were present at that time and all efforts have been made to make them a part of the program and the study. A notice regarding the vaccination program was circulated among all the students of the medical college (only 1^st- and 2^nd-year students are there) through proper channels of the department of community medicine. With a response rate of 81.3%, a total of 161 students participated in the study out of 198. The students were invited to the department on specified dates for awareness and immunization against hepatitis B. Before the distribution of the questionnaire, the objectives of the study were explained to the participants, and they were informed that their participation was voluntary. Each student turning up for the immunization sessions were given a self-administered, semi-structured, and pretested questionnaire which had attached consent form for immunization. The questionnaire, having 22 questions, is divided into four parts – sociodemographic details, knowledge about HBV, attitude toward HBV, and practices related to HBV. The students who had not received any hepatitis B vaccine or had history of incomplete vaccination were enrolled for hepatitis B vaccination. Detailed methodology has been depicted in Figure 1.

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Figure 1

The flow chart of data collection and immunization activity. An official notice was circulated among the 2^nd- and 4^th-semester medical students, whose total number was 198. Out of them, 37 students did not participate in the study and 161 students did. The students who appeared were explained about the study and a knowledge, attitude, and practice questionnaire and consent form was distributed to them. Out of them, 13 students reported that they have received all three doses of hepatitis B vaccine. Rest of the 148 students was vaccinated

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The knowledge score, ranging from 0 to 16, was calculated based on the correct responses out of the 16 knowledge questions. Similarly, the practice score, ranging from 0 to 4, was calculated based on the responses that the student gave to four positive practices questions. KAPs were considered to be dependent variables and age, sex, and semester were considered as independent variables. Data were coded, entered, and analyzed using the Statistical Package for the Social Sciences. Ethical approval of this study was received from the Institutional Ethical Review Board of Dr. BSA Medical College.

Results

Characteristics of the study participants

From the combined strength of 198 of the second and fourth semester (1^st and 2^nd year) students, 161 (81.3%) students turned up for immunization on the specified dates. The students were between the ages of 17 and 25 years. About 37 (18.7%) students did not attend the sessions even after repeated announcements (at least three times) and their status could be ascertained. Majority of the students were male (112, 70%) as compared to females (49, 30%) [Table 1].

Table 1 Descriptive characteristics of students involved in the study (n=161)

Knowledge of students regarding risk, mode of transmission, and prevention of hepatitis B

The knowledge about their risk of acquiring the disease at the hospital was present in less than half of the students. Only 50.3% were aware that it can be transmitted through percutaneous injury, 39.8% knew about the transmission through contact of mucous membrane with potentially infectious material, and 44.1% knew that it can be transmitted if breached skin comes in contact with infectious material. Only 47 (29.2%) students knew that there is a 10%–30% risk of transmission of HBV infection in case of a needlestick injury. The mode of transmission or source of infection was correctly answered by 24%–94% of the students where maximum students (94.5%) knew about the blood or blood products and very few students (24.2%) knew about the breast milk as being the source of infection for hepatitis B. A large number of students knew about the ways of prevention of hepatitis B like 95.2% knew about use of sterile instruments, 92.5% about safe sex, 98% about hepatitis B vaccination, and 81.6% about use of gloves while handling infectious material. The mean knowledge score of 2^nd-year students was 11.3 and that of 1^st-year students was 10.6 out of 16. There was statistically significant difference between the knowledge of 1^st- and 2^nd-year students (P = 0.008) [Table 2]. When the students were asked whether they have been exposed to potentially infectious material, everyone stated that they have not. Similarly, none of the students reported being hepatitis B status positive.

Table 2 The knowledge of medical students regarding the spread and prevention of hepatitis B infection

Attitude of students toward vaccination against hepatitis B

The attitude of the students has been given in Table 3. Out of the four attitude questions, two were positive and two were negative. The attitude of the students was positive as 155 (96.3%) opined that everyone should get hepatitis B vaccination and 145 (90.1%) thought that the vaccine is certainly helpful. Only six (3.7%) students said that they are either not at risk or do not need the vaccine.

Table 3 The attitude of students toward hepatitis B vaccination

Preventive practices of students toward hepatitis B

Out of the 161 study participants, only 13 (8%) students had received a completed course of hepatitis B vaccination in the past, 30 (18.7%) students had a history of inability to complete the three doses of hepatitis B vaccination and the rest 118 (73.3%) students were never immunized against hepatitis B. Majority of the students stated that they ask for a new syringe whenever they get injections, they ask the barber to change the blade before shaving or cutting hair and they ask for sterilized equipment for ear or nose piercing (89.4%, 89.4%, and 88.8%, respectively) [Table 4]. There was no difference in the attitude and practices of the medical students. However, there was a positive correlation between the knowledge scores and practice scores of the students (P = 0.012), implying that better knowledge of the disease has a positive effect on the practices exercised by an individual [Table 5].

Table 4 Preventive practices of students toward Hepatitis B

Table 5 Correlation between knowledge score and healthy practice score

Discussion

Exposure to bloodborne pathogens such as HBV infection remains a significant occupational hazard to HCWs, especially in countries where this infection is highly prevalent.[29] KAP surveys form a useful tool to ascertain the problem, suggest solutions, and form policies. There is a paucity of data on KAP of medical students in the city, and this study has been done to throw some light on the same. The findings mandate a health awareness and hepatitis B vaccination drive among medical colleges as the budding doctors are an invaluable resource and they should be provided with an armor of prevention against hepatitis B which is very likely to encounter them in their medical career.

From the study, it was found that majority of the medical students (59.6%) had not received hepatitis B vaccination previously and 15.2% of them had incomplete vaccination. Status of 18.3% students could be ascertained as they did not turn up for vaccination. The reasons for nonparticipation could be lack of interest, fear of injection or adverse reaction, planning to get immunized later, or already received complete vaccination previously. Other studies have also reported low immunization rates among medical students.[303132] While one can easily assume that HCWs or medical students will show a high level of compliance with regard to beneficial health procedures and program, evidence from literature suggests otherwise.[333435] The vaccination of HCWs become even more important as most of the HBV infections in HCWs are attributable to accidental percutaneous exposure which are deemed trivial to be recalled by HCWs for executing preventive measures.[36]

The WHO seeks to achieve the goal of viral hepatitis elimination by 2030 and lack of general knowledge about viral hepatitis seems to be a barrier to reaching this goal.[37] This study showed that medical students have poor knowledge and lack of awareness about hepatitis B, its routes of transmission, risk factors, and modes of prevention; however, the attitude is largely positive. The findings are congruent with that of other studies.[243839] According to a study on medical students by Al-Ghamdi, anti-HBs levels were significantly low in many students after their primary immunization. Therefore, the testing medical students for anti-HBs levels may be warranted as they represent a high-risk population.[40] A few studies, however, reports good knowledge (>80%) among the medical students.[2529]

The study facilitated to immunize the future budding health-care professionals against hepatitis B infection. The study was planned and executed within the mandate of WHO hepatitis B guidelines in a low- and middle-income country such that maximum gains are attained by existing available resources. The immunization activity served as a good platform for the students for gaining awareness on related subtopics such as standard/universal precautions, biomedical waste management, and postexposure prophylaxis.

Conclusion

Newly enrolled students and other individuals attached to a high-risk setting such as a medical institution should be screened for immunization status during initial medical examination as the number of unimmunized persons, especially against hepatitis B, are high. The study served to screen and enroll individuals with incomplete or no immunization against hepatitis B and immunize them in the catch-up vaccination program. Such screening and catch-up vaccination program can enable policy-makers to achieve elimination levels of hepatitis B.