Abstract
Healthcare workers are susceptible to blood borne pathogens, such as human immunodeficiency virus (HIV). Occupational exposure to HIV infection among healthcare workers is becoming a global public health concern. However, there is limited evidence about occupational exposure of healthcare workers to HIV and utilization of post-exposure prophylaxis in Addis Ababa, Ethiopia. Accordingly, this study was conducted to assess the prevalence of occupational exposure to HIV and utilization of post exposure prophylaxis among healthcare workers at St. Peter’s specialized hospital, Addis Ababa, Ethiopia. A health facility-based cross-sectional study was conducted among 308 randomly selected healthcare workers in April 2022. Structured and pretested self-administered questioner was used to collect data. Occupational exposure to HIV was taken as any percutaneous injury or blood or other body fluids exposure while administering medications, specimen collection, and other procedures with HIV confirmed patients. Multivariable binary logistic regression analysis was used to identify factors associated with occupational exposure to HIV and utilization of post-exposure prophylaxis. Statistically significant association was declared on the basis of adjusted odds ratio with 95% confidence interval and p-value less than 0.05. The study found that 42.3% (95% CI 36.6, 47.9%) of the healthcare workers had occupational exposure to HIV during their career time, out of whom 16.1% (95% CI 11.9, 20.3%) used post-exposure prophylaxis. Healthcare workers with lower-level education such as diploma (AOR: 0.41, 95% CI 0.17, 0.96) and BSc (AOR: 0.51, 95% CI 0.26, 0.92), and healthcare workers who received infection prevention training (AOR: 0.55, 95% CI 0.33, 0.90) had less risk of exposure to HIV. On the other hand, nurses (AOR: 1.98, 95% CI 1.07, 3.67), midwifes (AOR: 3.79, 95% CI 1.21, 11.9), and physicians (AOR: 2.11, 95% CI 1.05, 4.22) had high risk of exposure to HIV compared with other professionals. Moreover, healthcare workers with BSc degree compared with healthcare workers with masters degree (AOR: 3.69, 95% CI 1.08, 12.6), healthcare workers with long service year (AOR: 3.75, 95% CI 1.64, 8.57), and healthcare workers who are working in facilities where prophylaxis is available (AOR: 3.41, 95% CI 1.47, 7.91) had higher odds to utilize post-exposure prophylaxis. Significant proportion of healthcare workers included in the current study had occupational exposure to HIV and very few of them used post-exposure prophylaxis. Healthcare workers need to use appropriate personal protective equipment, safely manage contaminated equipment, and safely administered medications and collect specimen to protect themselves from exposure to HIV. Moreover, use of post-exposure prophylaxis should be promoted when exposure exists.
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Introduction
Occupational exposure to infectious agents is one of the most important risk factors for HIV transmission among healthcare employees. Healthcare workers face a greater challenge as a result of their duties and responsibilities1,2,3. An occupational exposure that may place a healthcare workers at risk of HIV infection is defined as a percutaneous injury (e.g. a needle stick or cut with a sharp object), contact of mucous membrane or contact of skin (especially when the exposed skin is chapped, abraded or afflicted with dermatitis or when the contact is prolonged or involves an extensive area) with blood, tissues or other potentially infectious body fluids4. According to the World Health Organization (WHO), it is estimated that about 3 million HCWs are exposed to blood-borne pathogens each year and occupational exposure causes approximately 170,000 HIV infections5.
The risk of infections from blood-borne pathogens is increased by a number of circumstances, including absence of fundamental personal protection equipment, poor adherence to safety procedures, excessive use of injectable therapy, and needle-stick or sharp injuries6,7,8,9. The prevalence of HIV infection among patients, frequency of incidents in which HCWs are exposed to HIV-infected fluids, and the likelihood of transmission following occupational HIV exposure all affect the occupational risk of HIV infection among healthcare workers1,10. It is believed that 56.2% of healthcare workers worldwide sustained needle-stick and sharp injuries during the course of their careers, making needle-stick injuries the most common form of HIV exposure in healthcare settings11. However, there is a less than 1% chance of contracting HIV through a needlestick wound, and there is a less than 0.1% chance of getting exposed through direct skin contact with the fluid12.
There are many ways to prevent occupational exposure to HIV. Healthcare workers should assume all body fluids are infectious and take precautions such as use of protective covering like gloves and goggles, wash hands and other skin areas right after contact with blood and body fluids, careful handling and disposal of needles and sharp instruments, use of available safety devices to prevent needle stick injuries. If an exposure does occur, induce bleeding at the site of a skin puncture by applying gentle pressure around the wound, rinse the area well with water for a skin or mucous splash, know the infected person’s information, report to supervisor and coworkers, and seek immediate medical care12,13,14,15,16.
Post-exposure prophylaxis use is an important medical care to reduce the risk of HIV after occupational exposure occurred. Post-exposure prophylaxis provide 81% protection when started between 60 min and 72 h and followed for 28 days17. Post-exposure prophylaxis for HIV is the use of antiretroviral medications for a brief period of time to lower the risk of HIV infection following potential occupational or sexual exposure. Post-exposure prophylaxis for HIV should be administered as part of a comprehensive universal precaution package in the health sector18. Occupational exposure to HIV and not using post-exposure prophylaxis cause occupational burnout among healthcare workers due to severe adverse psychological pressure, such as stress and anxiety. This could largely erode the quality of healthcare services and in turn increase the risk of injuries to healthcare workers. The healthcare system needs therefore identify the predisposing factors for high risk of exposure. Accordingly, this study was conducted to assess the prevalence of occupational exposure to HIV, post exposure prophylaxis uses and associated factors among healthcare workers at St. Peter’s specialized hospital, Addis Ababa, Ethiopia.
Methods
Study design and setting
A health facility-based cross-sectional study was employed in St. Peter’s specialized hospital in Addis Ababa, Ethiopia. The hospital is located high in the Entoto mountain range, north of the city. The hospital was established in the era of Emperor Haile Selassie in 1948. Currently, the hospital has a total 936 healthcare workers [289 physicians, 343 nurses, 49 midwifes, 64 pharmacists, 68 laboratory personnels, 29 anesthetists, 39 public health officers, 25 radiographers, 9 dentists, 7 psychiatrists, 3 ophthalmologists, and 11 other healthcare workers (environmental health and optometrists)].
Sample size calculation and sampling procedures
Sample size was calculated using single population proportion formula with the following assumptions: prevalence of occupational exposure to HIV in Dilla university referral hospital, southern Ethiopia = 76.1%19, 95% confidence level, 5% level of significance, 5% margin of error.
n = \(\frac{{Z\alpha^{2} p\left( {1 - p} \right)}}{{d^{2} }}\) = \(\frac{{1.96^{2} *0.761\left( {1 - 0.761} \right)}}{{0.05^{2} }}\) = 280. The final sample size became 308 after considering 10% non-response rate. All healthcare workers who had a potential to be exposed to HIV in their day-to-day professional activities were included in the study. Simple random sampling technique was used to recruit study subjects. We first prepared a sampling frame of eligible healthcare workers using their list obtained from the human resource department, and we then selected the study subjects using computer generated random number.
Measurement of outcome variables
Occupational exposure to HIV, the primary outcome variable of this study was defined as any percutaneous injury and blood or other body fluids splash resulted while administering medications, specimen collection, and other procedures with HIV confirmed patients that may exposed healthcare workers to blood-borne pathogens20. Post-exposure prophylaxis use is the administration of antiretroviral medication within 72 h of contact with potentially contaminated blood or other body fluids in order to reduce the risk of infection20. For low-risk HIV infections, a combination of Tenofovir (TDF) + Lamivudine (3TC) or Zidovudine (AZT) + Lamivudine (3TC) while for high-risk exposures triple therapy should be used i.e., Zidovudine (AZT) + Lamivudine (3TC) + Lopinavir (LPV), Zidovudine (AZT) + Lamivudine (3TC) + Atazanavir (Atv), Tenofovir (TDF) + Lamivudine (3TC) + Dolutegravir (DTG), Tenofovir (TDF) + Lamivudine (3TC) + Lopinavir (LPV) and Tenofovir (TDF) + Lamivudine (3TC) + Atazanavir (Atv)20.
Data collection procedures
Structured and pretested self-administered questionnaire was used to collect data. The questionnaire was adapted from published articles20,21,22,23,24. The questionnaire was initially prepared in English and translated into Amharic version, and back translated to English language to check for consistency. The questionnaire consists of socio demographic characteristics and behavioral factors, exposure to HIV, and post-exposure prophylaxis use. The data collection process was facilitated by three BSc nurses. Data were collected after obtaining written consent from the study participants. Data collection facilitators checked completeness of the questionnaire upon return.
Data processing and analysis
Data were entered to Epi-data version 3.1 epidemiological software and exported to Statistical Package for Social Sciences (SPSS) version 25 for further analysis. For most variables, data were presented by frequencies and percentages. We included predictors to the multivariable binary logistic regression model based on bivariate p value (p < 0.25). Statistically significant associations in the multivariable model were identified on the basis of adjusted odds ratio (AOR) with 95% confidence interval (CI) and p values < 0.05. Model fitness was check using Hosmer and Lemeshow goodness-of-fit test.
Ethics approval and consent to participate
Ethical clearance was obtained from the Institutional Review Board of Addis Ababa Medical and Business College (Reference number: AAMBC/STU/10,842/14) and submitted to St. Peter’s specialized hospital for permission. There were no risks due to participation and the collected data were used only for this research purpose with complete confidentiality. Written informed consent was obtained from the study participants. All the methods were carried out in accordance with relevant guidelines and regulations.
Results
Sociodemographic characteristics of study participants
From a total of 308 study participants, 298 of them returned the completed questioners with a response rate of 96.7%. The study participants were aged between 21 and 45 years and the mean (± SD) age was 30 (± 4.10) years. More than half, 158 (53%) of the study participants were married at the time of data collection and 151 (50.7%) of the study participants were Orthodox Christians by their religion. One hundred and nineteen (63.8%) of the study participants were male. Two-third, 198 (66.4%) of the study participants were Bachelor of Science degree holders and 108 (36.2%) of them were nurses. One hundred and fifty-three (51.3%) of the study participants had less than five years of work experience. One hundred and seventy-nine (60.1%) of the healthcare workers reported that they did not take on job infection prevention training (Table 1).
Occupational exposure of healthcare workers to HIV
One hundred and twenty-six (42.3%) (95% CI: 36.6, 47.9%) of the healthcare workers included in the current study had occupational exposure to HIV during their career time, out of which 27.8% exposed once, 28.6% exposed twice, 36.5% exposed three times, and 7.1% exposed four times and above. Forty-four (35%) of the healthcare workers reported that they exposed to HIV at workplace in the last three months prior to the survey. Fifty-two (42.9%) and 39 (31%) of the healthcare workers experienced needle-stick injuries and blood splash exposures, respectively. Eighty-four (66.7%) of the healthcare workers exposed to HIV while giving injections and 67 (53.2%) of the healthcare workers exposed during recapping needles. Eighty-two (65.1%) of the healthcare workers exposed to HIV during the day-time work shift. Fifty-nine (46.8%) of the healthcare workers did not use personal protective equipment during exposures (Table 2).
Utilization of post exposure prophylaxis
Forty-eight (16.1%) (95% CI 11.9–20.3) of the healthcare workers used post-exposure prophylaxis. One hundred and sixty-seven (56.0%) of the healthcare workers reported that they did not take training on post-exposure prophylaxis and 99 (33.2%) of the healthcare workers reported that post-exposure prophylaxis is not available in their facility (Table 3).
Factors associated with occupational exposure to HIV
Sex, age, marital status, field of study, educational status, work experience, infection prevention training, and availability of post-exposure prophylaxis in the facility were the candidate variables for the multivariable model and in the adjusted model, occupational exposure to HIV was significantly associated with educational status, field of study, and infection prevention training. Healthcare workers who were diploma holders had 59% less risk of exposure to HIV at the workplace compared with healthcare workers who had masters degree in their field of study (AOR: 0.41, 95% CI 0.17, 0.96). Healthcare workers who received infection prevention training had 45% lower odds of occupational exposure to HIV risky conditions compared with healthcare workers who did not receive infection prevention training (AOR: 0.55, 95% CI 0.33, 0.90). Moreover, the odds of having occupational exposure to HIV risky conditions among nurses were 1.98 times higher compared with other healthcare workers (AOR: 1.98, 95% CI 1.07, 3.67) (Table 4).
Factors associated with utilization of post-exposure prophylaxis
Age of respondents, marital status, field of study, educational status, work experience, having training on infection prevention, and availability of post-exposure prophylaxis were the candidate variables for the multivariable binary logistic regression analysis. In the adjusted model, educational status, work experience, and availability of post-exposure prophylaxis in the facility were significantly associated with utilization of post-exposure prophylaxis. The odds of utilization of post-exposure prophylaxis was 3.69 times higher among healthcare workers who had master’s degree and above compared with diploma holders (AOR: 3.69, 95% CI: 1.08, 12.6). Healthcare workers who had long work experience had higher odds to use post-exposure prophylaxis (AOR: 3.75, 95% CI: 1.64, 8.57). Moreover, the odds of utilization of post-exposure prophylaxis was 3.41 times higher among healthcare workers who reported that post-exposure prophylaxis is available in their facility (AOR: 3.41, 95% CI 1.47, 7.91) (Table 5).
Discussion
This hospital-based cross-sectional study was conducted to assess occupational exposure of healthcare workers to HIV and post-exposure prophylaxis use in St. Peter’s specialized hospital, Addis Ababa, Ethiopia and found that 42.3% (95% CI 36.64, 47.92%) of the healthcare workers exposed to HIV risky conditions during their career time and 16.1% (95% CI 11.9–20.3) of the exposed healthcare workers used post-exposure prophylaxis. The prevalence of occupational exposure to HIV in the current study is comparable with findings of studies in Gondar city, northwest Ethiopia (40.4%)25 and Nigeria (45.0%)26. The prevalence of occupational exposure to HIV in the current study is also lower than studies in Bule Hora General Hospital, Ethiopia (61.6%)20 and Tanzania (50.6%)27. On the other hand, this study finding is higher than studies in South Africa (10.6%)28 and Tanzania (35.1%)22. This high prevalence of occupational exposure to HIV risky conditions might be explained by poor safety system that includes lack of basic personal protective equipment, poor adherence to safety practices, and poor sharp waste management in the healthcare facilities. Furthermore, overuse of injectable therapy, suturing, recapping needles, bend or break needles, removing needles from syringes after injection, washing contaminated instruments, workload, working hastily, fatigue, crowded work environment may associate with needle-stick and sharp injuries that may result exposure to HIV. Moreover, 16.1% (95% CI 11.9, 20.3%) of the healthcare workers who had occupational exposure to HIV risky conditions used post-exposure prophylaxis, which is in agreement with studies in Ethiopia (19.6%)29, Cameron (18.9%)17, and Tanzania (16.7%)27. However, this study finding is lower than findings of studies in west Guji zone of Ethiopia (24.3%)20, South Africa (58.8%)28, and Tanzania (26.4%)27. This low-level utilization of post-exposure prophylaxis might be explained by frequent stock-outs and continuous absence of post-exposure prophylaxis. In addition, some individuals who exposed to HIV risky conditions might perceived that their risks to HIV due to occupational exposure might be low.
This study revealed that occupational exposure to HIV risky conditions was associated with educational status. Healthcare workers with lower education level had lower odds of occupational exposure to HIV risky conditions. This might be due to healthcare workers who have higher educational status performing advanced surgical procedures which might increase their exposure to HIV risky conditions30.
In the current study, occupational exposure to HIV risky conditions was significantly associated with infection prevention training. Healthcare workers who received infection prevention training had lower risks of occupational exposure to HIV. This study finding is in line with findings of other studies25,31. This might be due to the fact that infection prevention training is an effective strategy to develop knowledge and skills on safety measures and trained healthcare workers can protect themselves and other coworkers from work place injuries32.
This study found that occupational exposure to HIV risky conditions was statistically associated with field of study. For instance, nurses, midwifes, and physicians had higher odds of exposures compared with other healthcare workers such as public health officers, anesthetists, psychiatrists, radiologists, pharmacists, and optometrists). This finding is in agreement with a study in Serbia33. The possible explanations could be nurses, midwifes, and physicians had more frequent contact with patients during healthcare provision as well as they do invasive procedure like injection of medication, surgery, and delivery that increases their risk to healthcare associated infections34.
Furthermore, this study depicted that utilization of post-exposure prophylaxis among healthcare workers exposed to HIV risky conditions was significantly associated with educational status. Healthcare workers who had master’s degree and above had higher odds of post-exposure prophylaxis use, which is in agreement with a study in Uganda35. This could be due to the fact that healthcare workers at a higher educational level may have awareness about the mechanisms how post-exposure prophylaxis helps to prevent from HIV infection so that they may not have fear of side effects and could develop positive attitude. Moreover, healthcare workers at a higher educational level can identify risky conditions for acquiring HIV infection36.
The current study reported that utilization of post-exposure prophylaxis was associated with work experience. Healthcare workers who had long work experience had higher odds to use post-exposure prophylaxis. This finding is in line with a study in Uganda35. This might be due to the fact that experienced healthcare workers might have information about advantage of post-exposure prophylaxis use over its side effects37. Moreover, as service year increases, the perceived vulnerability to infection might be high that may motivate healthcare workers to use prophylaxis when they are exposed to HIV risky conditions and long work experience might be associated with increased adherence to infection prevention strategies38.
This study also revealed that availability of post-exposure prophylaxis in the facility at the time when healthcare workers were exposed to HIV risky conditions was associated with higher odds of post-exposure prophylaxis utilization. The continuous availability of essential medicines within healthcare facilities plays an important role in promoting utilization of health services. On the other hand, frequent stock-outs of medicines have been shown to influence healthcare utilization. The continued absence of medicines in health facilities influences healthcare utilization and individual decisions39,40,41.
As a limitation, the self-reported data may not be reliable since the study subjects may make the more socially acceptable answer rather than being truthful and they may not be able to assess themselves accurately. The study might be also affected by recall bias since we asked healthcare workers to recall occupational exposures during their career time. There might be also possibility of unmeasured confounders (e.g., medical conditions). Moreover, the variable of interest was not equally important for all departments. It might be more in some departments such as laboratory, emergency, delivery, etc. However, we didn’t address this variation in the analysis. The number of healthcare workers in each profession was not also proportional, even if random sampling was utilized. This study also included only one hospital data in Ethiopia. All these may affect the generalizability of study results.
Conclusion
Significant proportion of healthcare workers included in the current study had occupational exposure to HIV and very few of them used post-exposure prophylaxis. This implies that occupational exposure to HIV in the studied healthcare facility is a great concern that may result exposure of healthcare workers to blood-borne pathogens. Healthcare workers need, therefore, use personal protective equipment (includes gloves, gowns, masks, and eye protection), safely manage contaminated equipment and other items in the patient environment, and follow safety procedures during medication administration, specimen collection, and other procedures to protect themselves from HIV and other blood-borne pathogens including use of post-exposure prophylaxis when needed. Moreover, the health facility needs to strengthen the health and safety culture of the institution and availability of post-exposure prophylaxis.
Data availability
Data will be made available upon requesting DT, who is the primary author of this study.
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The study was designed by D.T.; D.T., B.G., Z.N.M., N.G.D., and Z.G. participated during data collection, data processing and coding, and analysis and interpretation of findings. Z.G. prepared the manuscript. All the authors read and approved the final manuscript. Informed consent was obtained from all subjects for publication of the deidentified information.
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Tsega, D., Gintamo, B., Mekuria, Z.N. et al. Occupational exposure to HIV and utilization of post-exposure prophylaxis among healthcare workers at St. Peter’s specialized hospital in Addis Ababa, Ethiopia. Sci Rep 13, 7021 (2023). https://doi.org/10.1038/s41598-023-34250-4
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DOI: https://doi.org/10.1038/s41598-023-34250-4
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