Knowledge, attitude, and practice of dengue disease among healthcare professionals in southern Taiwan

Journal of the Formosan Medical Association (2013) 112, 18e23 Available online at www.sciencedirect.com journal homepage: www.jfma-online.com ORIGINAL ARTICLE Knowledge, attitude, and practice of dengue disease among healthcare professionals in southern Taiwan Tzong-Shiann Ho a,b,e, Mei-Chih Huang d, Shih-Min Wang b,e, Hsian-Chou Hsu c,e, Ching-Chuan Liu c,e, * a Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan City, Taiwan b Department of Emergency Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan City, Taiwan c Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan City, Taiwan d Department of Nursing, College of Medicine, National Cheng Kung University, Tainan City, Taiwan e Center of Infectious Diseases and Signaling Research, National Cheng Kung University, Tainan City, Taiwan Received 10 September 2012; accepted 5 November 2012 KEYWORDS attitude; dengue; healthcare professionals; knowledge; practice Background/Purpose: Primary physicians and nurses serve as the first-line health care providers of dengue virus infection diagnosis, notification, and treatment. Knowledge, attitude, and practice (KAP) among primary healthcare professionals (HCPs) regarding dengue diseases may pace alarm and improve the outcome of dengue control. Methods: A cross-sectional survey using a structured quiz in 264 HCPs (response rate, 76%) was conducted in Tainan City in southern Taiwan. The quiz consisted of 10 questions regarding the control measures, notification, and clinical practices of dengue diseases. Scores of KAP and demographic characteristics of HCPs were analyzed. Results: One hundred thirty-four physicians and 130 nurses comprise the 264 HCP responders. Forty-three physicians (32%) and 80 nurses (61.5%) were practicing in medical centers, and they scored higher than nonmedical center peers on quizzes on notification (1.18 vs. 0.93 points, p < 0.01) but lower on control measures (3.52 vs. 3.22 points, p < 0.01). Fifty-seven physicians (42.5%) were experienced in reporting suspected dengue cases, and 13.1% of nurses had reported dengue cases. Three-fourths of HCPs failed to respond to the timing of dengue case notification, whereas nurses scored higher than physicians (0.34 vs. 0.16, p < 0.01). In addition, 57.2% of the HCPs failed to respond correctly to the timing of typical skin rashes occurring in the patients with dengue. More than half of the HCPs considered Taiwan an endemic area of dengue diseases. * Corresponding author. Department of Pediatrics, National Cheng Kung University Hospital, Number 138, Sheng-Li Road, Tainan City 70403, Taiwan. E-mail address: liucc@mail.ncku.edu.tw (C.-C. Liu). 0929-6646/$ - see front matter Copyright ª 2012, Elsevier Taiwan LLC & Formosan Medical Association. All rights reserved. http://dx.doi.org/10.1016/j.jfma.2012.11.004

KAP study for dengue in southern Taiwan 19 Conclusion: This pilot study showed a lack of acquaintance with notification timing and important clinical features of dengue among HCPs in southern Taiwan. Future continued medical/ nursing education should place more emphasis on these factors to improve dengue control in this demographic area. Copyright ª 2012, Elsevier Taiwan LLC & Formosan Medical Association. All rights reserved. Introduction Dengue fever is a major arbovirus-borne infectious disease in tropical and subtropical regions of the world. 1 The disease is generally mild and self-limited, but some patients may develop a severe form of infection such as dengue hemorrhagic fever/dengue shock syndrome, which often leads to death. Currently, there is no vaccine available against dengue virus. The major determinants of dengue control are vector eradication, early case recognition, and adequate clinical management. 2,3 Dengue is not considered endemic in Taiwan; however, several outbreaks have been reported in southern Taiwan. 4 Taiwan s dengue outbreaks have a unique type of transmission: starting by import from abroad in early summer, spreading locally, and ending in the winter. This pattern repeats every year. 5 Most dengue cases occurred in Tainan, Pingtung, and Kaohsiung of southern Taiwan. Thus, dengue control has been an important issue for healthcare professionals (HCPs) in these areas. The World Health Organization (WHO) recognized the need for general guidelines for dengue management and published the first and revised editions of the dengue guideline in 1975 and 1997. The 1975/1997 WHO guidelines divided clinical dengue disease into dengue fever, dengue hemorrhagic fever, and dengue shock syndrome. Criticisms of the 1975/1997 guidelines included a rigid definition of dengue hemorrhagic fever and the lack of data from the adult group outside of the southeastern Asia region. 6 The WHO released the newest (third) edition of the dengue guideline in 2009 in response to the criticism after conducting the multicenter dengue control study. By introducing the concepts of warning signs and severe dengue, the 2009 guidelines intended to provide a more clinical management tool than merely a classification for dengue control and management. 7,8 Reliably identifying dengue patients early in their clinical course could direct patient management and reduce the transmission of dengue virus in a community. Timely identification of dengue infection would potentially enable HCPs to prevent additional cases among close contacts by urging patients with a positive dengue screening test to use personal protection measures against mosquito bites. 9 However, there are no accepted clinical guidelines for the recognition of early-stage dengue infection. 10e12 There is also no consensus as to whether clinical features can be used to distinguish dengue infection from other febrile illness. 13,14 Therefore, the identification of patients with dengue depends largely on the alertness of first-line HCPs. In nonendemic areas of dengue infection, reducing mortality is the primary goal of dengue control. Dengue fever is a notifiable infectious disease in Taiwan. According to the Communicable Disease Prevention Act in Taiwan, physicians are obliged to report the suspected dengue cases to the local health department within 24 hours of clinical diagnosis. Contacts of confirmed cases are also obliged to test their blood for dengue virus infection. Once the dengue-infected case is confirmed, the staff of the local health bureau will visit and interview the index case and make inquiries about the patient s travel and contact histories. Blood samples will be drawn from family members, colleagues, and neighbors within a radius of 50 m of the index case to ascertain whether any further spread of infection by a dengue virus-infected mosquito has occurred. The environment, including homes and working places within a radius of 50 m of the index case resident, will be sprayed with insecticides to reduce the vector source. These enforced measures pose a great burden to the healthcare and public heath systems. Primary physicians and nurses serve as the first-line healthcare providers of dengue case diagnosis, notification, and treatment. Knowledge, attitude, and practice (KAP) of primary HCPs regarding dengue diseases also provide early recognition and improve the outcome of dengue control. 15,16 However, KAP studies concerning dengue in HCPs are lacking. The purpose of the current study is to realize the cognitions of primary HCPs of dengue in southern Taiwan. The major goal of the study was to identify targets for further interventional studies. Methods Geographic location This study was performed in Tainan City (23.02 N, 120.17 E) in southwest Taiwan and lies on the rich and fertile Jianan Plain. It has a population of approximately 1,870,000 people. The total area of the city is 2,191.6531 km 2, which is approximately 6.09% of the total land area of Taiwan. Tainan is characterized by year-round high relative humidity and temperatures. The annual average temperature is 24.3 C, and average rainfall is 1698.2 mm during the years 1981e2010. 17 There are 993 clinics and 28 hospitals (including 2 medical centers) providing medical care in Tainan by the end of year 2011. Study population and design A cross-sectional survey using a structured quiz of HCPs in Tainan City, Taiwan prior to a continuing education entitled 2011 Dengue Containment Education Conference for Healthcare Facilities in Tainan City held on August 17, 2011. The quiz, which was developed after reviewing the

20 T.-S. Ho et al. literature and appraised by clinical infectious disease consultants, consisted of 10 questions regarding the control measures (4 points), notification (2 points), and clinical features (4 points) of dengue diseases. Scores and demographic characteristics of HCPs of different backgrounds were analyzed. Statistical analysis Independent Student s t-test and analysis of variance for continuous variables were performed using SPSS for Windows version 17.0 (SPSS, Chicago, IL, USA). Values of p < 0.05 were considered significant. Results A total of 331 test sheets were recovered (response rate, 76%), and 264 copies were included for further analysis after excluding 10 uncompleted and 57 filled by non-hcps. Demographic data Among the 264 responders, there were 134 physicians and 130 nurses. Most physicians are male (86.6%) and most nurses are female (96.6%). Forty-three physician (32%) and 80 nurses (61.5%) were practicing in medical centers. The leading specialty of the physicians was internal medicine (32.8%), followed by family medicine (18.7%) and pediatrics (13.4%). Most of the respondents were experienced healthcare practitioners. Moreover, 59% of physicians and 43.1% of nurses had clinical experiences of more than 10 years. Incomparably, less than half of physicians (42.5%) have experience in reporting suspected dengue cases, and only 13.1% of nurses have reported dengue cases (Table 1). Answers to dengue quizzes among responders Most HCPs are familiar with the roles of mosquitoes and breeding sites for mosquito wigglers in dengue containment (Table 2, Q1-Q3, >90% correct). However, less than half of the HCPs correctly answered Q4, Dengue is an endemic disease throughout Taiwan (scale of infection, 47.7% correct), Q5 A suspected dengue case should be reported to the CDC within 72 hours by law (timing of notification, 25% correct), and Q7 Rash always appears on the second day of dengue fever (important clinical feature, 42.8% correct). Three-fourths of HCPs failed to correctly answer the question about timing of dengue case notification, whereas nurses scored higher than physicians (0.34 vs. 0.16, p < 0.01). In addition, 57.2% of the HCPs failed to correctly answer the question about timing of typical skin rashes in dengue patients. More than half of the participants considered Taiwan an endemic area of dengue diseases. Table 1 Demographic characteristics of healthcare professionals participating in a knowledge, attitude and practice study on dengue diseases in southern Taiwan. All participants (n Z 264) Physicians (n Z 134) Nurses (n Z 130) No. a % No. a % No. a % Sex 264 134 130 Male 120 45.5 116 86.6 4 3.1 Female 144 54.5 18 13.4 126 96.6 Experience b 258 132 126 <2 y 24 9.1 8 6.0 16 12.3 2e10 y 99 37.5 45 33.6 54 41.5 >10 y 135 51.1 79 59.0 56 43.1 Specialty c 260 133 127 Internal medicine 83 31.9 44 32.8 39 30.0 Surgery 36 13.8 10 7.5 26 20.0 Family medicine 40 15.4 25 18.7 15 11.5 Pediatrics 34 13.1 18 13.4 16 12.3 Ear, nose, throat 18 6.9 11 8.2 7 0 Dermatology 5 1.9 5 3.7 0 0 Infectious disease 4 1.5 2 1.5 2 1.5 Others 40 15.4 18 13.5 22 16.9 Practice site 259 131 128 Medical center 123 46.6 43 31.2 80 61.5 Nonmedical center 136 51.5 88 65.7 48 36.9 Reported a dengue case 258 131 127 Yes 74 28.0 57 42.5 17 13.1 No 184 69.7 74 55.2 110 84.6 a Presented as number of respondents. b Defined as years after completing training. c Defined by major practice settings.

KAP study for dengue in southern Taiwan 21 Table 2 Different responses between professions and practice settings to a baseline quiz concerning knowledge, attitude, and practice of dengue fever by healthcare professionals in southern Taiwan prior to a continuing education conference. Category of questions Average score Physician (n Z 134) Nurse (n Z 130) p* Nonmedical center Medical center Control measures 3.39 3.37 0.81 3.52 3.22 <0.01 Q1. The vectors of dengue infection are Aedes aegypti 0.99 0.99 0.98 0.99 0.99 0.94 and Aedes albopictus. (true) Q2. If there are breeding sites for mosquito wigglers, 0.99 0.98 0.63 0.99 0.98 0.92 there is possibility of dengue outbreak. (true) Q3. Vacant lands, houses or abandoned factories are 0.92 0.94 0.52 0.93 0.93 0.82 potential breeding sites for mosquito wigglers in Tainan. (true) Q4. Dengue is an endemic disease throughout Taiwan. 0.49 0.46 0.62 0.61 0.32 <0.01 (false) Notification 1.01 1.08 0.37 0.93 1.18 <0.01 Q5. A suspected dengue case should be reported to the 0.16 0.34 <0.01 0.15 0.37 <0.01 CDC, Taiwan within 72 hours by law. (false) Q6. The patient may serve as an intermediate host for 0.86 0.75 0.03 0.78 0.81 0.50 mosquito transmission at 1 day before up to 5 days after the onset of fever. (true) Clinical features 2.57 2.58 0.93 2.60 2.58 0.86 Q7. Rash always appears on the second day of dengue 0.44 0.42 0.68 0.42 0.46 0.56 fever. (false) Q8. Most cases of dengue hemorrhagic fever are children 0.82 0.84 0.71 0.83 0.83 0.97 in Taiwan. (false) Q9. Low white blood cell counts are observed after the 0.78 0.83 0.27 0.84 0.77 0.18 third day of dengue fever. (true) Q10. Rash usually appears after shock in dengue shock 0.54 0.50 0.55 0.51 0.52 0.83 syndrome patients. (true) Total score 6.98 7.04 0.68 7.04 6.98 0.07 *p < 0.05 is considered statistically significant. CDC Z Centers for Disease Control and Prevention. p* Physicians versus nurses responses to dengue quizzes The overall performance of physicians and nurses is similar except for Q5, A suspected dengue case should be reported to the CDC within 72 hours by law, and Q6, The patient may serve as an intermediate host for mosquito transmission at 1 day before up to 5 days after the onset of fever. Nurses are better than physicians in identifying incorrect descriptions about timing of reporting a dengue case (average score: 0.34 vs. 0.16, p < 0.01). However, physicians are better at answering the period of communicability of dengue infection (average score: 0.86 vs. 0.75, p Z 0.03) (Table 2). Practice settings and responses to dengue quizzes Those practicing in medical centers scored higher than their peers in nonmedical centers in identifying notification timing (Q5, 0.37 vs. 0.15, p < 0.01), but failed to correctly identify the current epidemiologic status (not endemic) of Taiwan (Q4, 0.32 vs. 0.61, p < 0.01) (Table 2). Discussion Previous KAP studies concerning dengue virus control showed the most common problem is the lack of knowledge about clinical features or control measures. 18,19 The current study also found a lack of knowledge about important clinical characteristics of dengue. However, more than 90% of primary HCPs in southern Taiwan are familiar with vector control measures, which is in contrast with previous findings. This might reflect the results of major efforts of health authority for dengue control in Taiwan. Despite the fact that dengue is an obligatorily reportable infectious disease by law in Taiwan, most of the HCPs in our survey are unfamiliar with the notification regulation. In the community/national level of dengue control, primary physicians and nurses serve as the first-line healthcare providers of dengue case diagnosis, notification, and treatment. The knowledge of primary HCPs regarding dengue diseases also determines the outcome of dengue control. The previous KAP studies concerning dengue control showed a variety of different population and geographical areas. A survey of adult Thailand residents showed health education by health personnel played an important role in disseminating dengue hemorrhagic fever (DHF) information

22 T.-S. Ho et al. and prevention methods. 20 A significant association between knowledge of dengue and attitude toward Aedes mosquito control was reported in Malaysia, but good knowledge does not necessarily lead to good practice. 21 Our study found significant differences in knowledge of dengue disease among HCPs in medical centers and other settings. A recent study in Singapore also showed significant variations in clinical practice of primary care physicians by practice setting. 15 More HCPs in medical centers considered Taiwan an endemic area for dengue than those in noncenter settings. Nonetheless, only 47.7% of the responders successfully picked the right answer. One possible explanation may be the frequent dengue outbreaks in Tainan, Kaohsiung, and Pingtung during the past decades. 4 A previous survey on Taiwanese HCPs knowledge on dengue fever found that physicians scored higher than nurses on questions about infectious agents, common symptoms, behavior of disease vectors, and epidemic area. 22 However, different HCPs showed different levels of acquaintance to control measure, notification, and clinical features of dengue diseases in our study. Nurses do better in answering the question about notification timing by law than physicians, but are less familiar with the period of communicability of dengue. A possible explanation of the differences may reflect the different focuses in these two groups; physicians usually are not responsible for notification of clinical settings in Taiwan. However, the overall correct rate for the notification timing question is still low (25%), the difference between two groups of HCPs might warrant further clarification, but the results implied a professiontailored continuing education in different groups of HCPs. Another question that more than half of the respondents failed to answer correctly is the timing of appearance of skin rashes in dengue patients (Q7, correct rate 42.8%). The typical white islands in the sea of red skin rashes do not appear in every patient with dengue, 23 so HCPs are not familiar with this relatively late sign in dengue infection. Continuing medical education with credit certification is a traditional vehicle for updating clinical knowledge for healthcare professionals. 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