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Review Article
Infection
Changes in age-specific seroprevalence of Japanese encephalitis virus and impact of Japanese encephalitis vaccine in Korea
Byung Ok Kwak, Young Jin Hong, Dong Hyun Kim
Clin Exp Pediatr. 2022;65(3):108-114.   Published online September 24, 2021
Since the introduction of a universal Japanese encephalitis (JE) vaccination program and urbanization, the incidence of JE has dramatically decreased in Korea. However, recent JE cases have occurred, predominantly among unvaccinated adults and with a shift in age distribution. Continuous surveillance of the seroprevalence of JE is required to establish a proper immunization policy in Korea.
Original Article
Infection
Prevalence of methicillin-resistant Staphylococcus aureus in Iranian children: a systematic review and meta-analysis
Farhad Sarrafzadeh, Seyed Mojtaba Sohrevardi, Hamid Abousaidi, Hossein Mirzaei
Clin Exp Pediatr. 2021;64(8):415-421.   Published online November 20, 2020
The pooled prevalence of methicillin-resistant Staphylococcus aureus (MRSA) was 42% among culture-positive cases of S. aureus, 51% in hospitalized children, and 14% in healthy children. The high prevalence of MRSA in Iranian children may be due to insufficient infection control measures in hospitals, inappropriate use of methicillin, inadequate staff training, and over-prescription of antibiotics in Iran.
Hematology
Changes in the prevalence of anemia in Korean adolescents, 1998–2018
Jun Young An, Yoo Rha Hong, Seom Gim Kong
Clin Exp Pediatr. 2021;64(2):86-92.   Published online November 16, 2020
Question: Over the past 21 years, has the prevalence of anemia decreased among Korean adolescents?
Finding: The prevalence of anemia in boys aged 10–18 years decreased from 3.0% to 0.5% over the study period, whereas that in girls did not change significantly over time (increased from 7.9% to 8.5%).
Meaning: The prevalence of anemia in female adolescents remains high, requiring attention and efforts to improve it.
Gastroenterology
Celiac disease in children: Increasing prevalence and changing clinical presentations
Hasan M. Isa, Eman Farid, Jaafar J. Makhlooq, Afaf M. Mohamed, Jumana G. Al-Arayedh, Fawzeya A. Alahmed, Shima Medani
Clin Exp Pediatr. 2021;64(6):301-309.   Published online October 17, 2020
Question: What are the prevalence and clinical characteristics of celiac disease (CD) in children in Bahrain?
Finding: We found a significant increase in CD prevalence over the last decade (P=0.0001). A male predominance was noted. Atypical presentations were common. Most patients had poor adherence to a gluten-free diet.
Meaning: CD is an underdiagnosed condition. Atypical symptoms should be considered to prevent missing patients with CD.
Review Article
Allergy
Prevalence, comorbidities, diagnosis, and treatment of nonallergic rhinitis: real-world comparison with allergic rhinitis
Hye Yung Yum, Eun Kyo Ha, Yoon Ho Shin, Man Yong Han
Clin Exp Pediatr. 2021;64(8):373-383.   Published online August 10, 2020
Rhinitis is among the most common respiratory diseases in children. Nonallergic rhinitis, which involves nasal symptoms without evidence of systemic allergic inflammation or infection, is a heterogeneous entity with diverse manifestations and intensities. Nonallergic rhinitis accounts for 16%–89% of the chronic rhinitis cases, affecting 1%–50% (median 10%) of the total pediatric population. The clinical course of nonallergic rhinitis is generally...
Systematic review and meta-analysis
Genetics and Metabolism
Global prevalence of classic phenylketonuria based on Neonatal Screening Program Data: systematic review and meta-analysis
Hamid Reza Shoraka, Ali Akbar Haghdoost, Mohammad Reza Baneshi, Zohre Bagherinezhad, Farzaneh Zolala
Clin Exp Pediatr. 2020;63(2):34-43.   Published online February 6, 2020
Question: What is the global prevalence of classic phenylketonuria based on Neonatal Screening Program Data?
Finding: The overall worldwide prevalence of the disease is 6.002 per 100,000 neonates. The highest prevalence (38.13) was reported in Turkey, while the lowest (0.3) in Thailand.
Meaning: This difference in the prevalence may be due to differences in the number of consanguineous marriages among the different regions, phenylalanine cutoff points, and sample sizes.
Original Article
Allergy
Ten-year trends and prevalence of asthma, allergic rhinitis, and atopic dermatitis among the Korean population, 2008–2017
Jihyun Ha, Seung Won Lee, Dong Keon Yon
Clin Exp Pediatr. 2020;63(7):278-283.   Published online January 29, 2020
Background: Major questions remain regarding the agestratified trends of allergic diseases and asthma in Korea.
Purpose: To identify the estimated recent prevalence and 10- year trends in asthma, allergic rhinitis, and atopic dermatitis among the Korean population from 2008 to 2017. Methods: This nationwide cross-sectional survey (Korean National Health and Nutrition Examination Survey) over 10 years (2008–2017) examined representative samples of the...
Review Article
Endocrinology
Prevalence of obesity and overweight in Iranian children aged less than 5 years: a systematic review and meta-analysis
kamyar mansori, Sorour Khateri, Yousef Moradi, Zaher Khazaei, Hossein Mirzaei, Shiva Mansouri Hanis, Mehran Asadi Aliabadi, Mehdi Ranjbaran, Fatemeh Varse, Serveh Parang
Clin Exp Pediatr. 2019;62(6):206-212.   Published online April 23, 2019

Purpose: The present study aimed to determine the prevalence of childhood obesity and overweight in Iranian children under 5 years of age using a systematic review and meta-analysis. Methods: We searched MEDLINE (PubMed), Web of Science, Google Scholar, Scopus, CINHAL, and the Iranian databases, including Scientific Information Database (www.sid.ir), Iranian Research Institute for Information Science and Technology (Irandoc.ac.ir), Iranmedex (www.iranmedex.com), and...
Original Article
Endocrinology
Prevalence and associates of obesity and overweight among school-age children in a rural community of Thailand
Teechaya Nonboonyawat, Wuttipat Pusanasuwannasri, Nattanon Chanrat, Natta Wongthanavimok, Danutanut Tubngern, Piengkwan Panutrakul, Mathirut Mungthin, Thirapa Nivesvivat, Panadda Hatthachote, Ram Rangsin, Phunlerd Piyaraj
Clin Exp Pediatr. 2019;62(5):179-186.   Published online February 8, 2019

Purpose: Information about overweight and obesity among students in rural areas of Thailand is limited. Therefore, we aimed to determine overweight and obesity prevalences and associated factors among school-aged children in a rural community of Thailand. Methods: We selected 9 public schools through cluster sampling in 2 provinces located in central Thailand in 2016. Anthropometric measurements were measured using standard techniques,...
Review article
Nutrition
Prevalence of underweight and wasting in Iranian children aged below 5 years: a systematic review and meta-analysis
Yousef Moradi, Fatemeh Khosravi Shadmani, Kamyar Mansori, Shiva Mansouri Hanis, Rozhin Khateri, Hossein Mirzaei
Clin Exp Pediatr. 2018;61(8):231-238.   Published online August 15, 2018

Purpose: Wasting and underweight are the 2 main indicators of children’s undernutrition. We aimed to estimate the prevalence of undernutrition at the national level in Iran. Methods: We performed a search for original articles published in international and Iranian databases including MEDLINE, Web of Science, Google Scholar, Scopus, CINHAL (Cumulative Index to Nursing and Allied Health Literature), Scientific Information Database, Irandoc,...
Original Article
General Pediatrics
Sleep problems in children and adolescents at pediatric clinics
Dong Soon Kim, Cho Long Lee, Young Min Ahn
Clin Exp Pediatr. 2017;60(5):158-165.   Published online May 31, 2017
Purpose

To investigate the frequency of childhood sleep problems at pediatric clinics in Seoul and Gyeonggi provinces.

Methods

Children (n=936) and their parents who visited 5 primary and 1 secondary pediatric outpatient clinics were invited to complete a Pediatric Sleep Questionnaire.

Results

Among patients, 901 (96.3%) answered questionnaires in sufficient detail for evaluation. The participant's mean age was 4.35±3.02 years (range, 0–18 years). The male...

Review Article
Allergy
IgE-mediated food allergies in children: prevalence, triggers, and management
Sooyoung Lee
Clin Exp Pediatr. 2017;60(4):99-105.   Published online April 25, 2017

Food allergy (FA) is a serious health problem, and severe FA such as food-induced anaphylaxis can often be life threatening. The incidence of FA has been increasing especially in children. They usually develop early in life and affect up to 10% of children. The 2 most common food allergens worldwide are milk and eggs, while the third one varies depending...

Original Article
Prevalence and comorbidity of allergic diseases in preschool children
Hyeong Yun Kim, Eun Byul Kwon, Ji Hyeon Baek, Youn Ho Shin, Hye Yung Yum, Hye Mi Jee, Jung Won Yoon, Man Yong Han
Clin Exp Pediatr. 2013;56(8):338-342.   Published online August 27, 2013
Purpose

Allergic disease and its comorbidities significantly influence the quality of life. Although the comorbidities of allergic diseases are well described in adult populations, little is known about them in preschool children. In the present study, we aimed to assess the prevalence and comorbidity of allergic diseases in Korean preschool children.

Methods

We conducted a cross-sectional study comprising 615 Korean children (age, 3...

Comparison of air pollution and the prevalence of allergy-related diseases in Incheon and Jeju City
Su Ho Jeong, Jeong Hee Kim, Byong Kwan Son, Seong Chul Hong, Su Young Kim, Geun Hwa Lee, Dae Hyun Lim
Clin Exp Pediatr. 2011;54(12):501-506.   Published online December 31, 2011
Purpose

A high level of air pollutants can increase the number of patients with allergy-related diseases such as asthma and allergic rhinitis (AR). To analyze the association between air pollution and allergic disease, we investigated 2 areas in Korea: Incheon, an industrial area, and Jeju, a non-industrialized area.

Methods

Second grade students at elementary schools (11 schools in Incheon and 45 schools in...

Nationwide surveillance of acute interstitial pneumonia in Korea
Byoung-Ju Kim, Han A Kim, Young-Hwa Song, Jinho Yu, Seonguk Kim, Seong Jong Park, Kyung Won Kim, Kyu-Earn Kim, Dong Soo Kim, June Dong Park, Kang Mo Ahn, Hyo-Bin Kim, Hyang-Min Jung, Chun Kang, Soo-Jong Hong
Clin Exp Pediatr. 2009;52(3):324-329.   Published online March 15, 2009
Purpose : Acute interstitial pneumonia (AIP) is a rare disease, but its prognosis is fatal because of lack of efficient treatment modality. Recently, it has been reported that there was epidemic AIP in Korea. This study aims to investigate the past and current status of AIP in Korea. Methods : We performed a nationwide survey and a prospective study. From August...
Review Article
The prevalence of pediatric endocrine and metabolic diseases in Korea
Dong Hwan Lee
Clin Exp Pediatr. 2008;51(6):559-563.   Published online June 15, 2008
The government neonatal screening program has a 17-years history. Therefore, it can now provide information on the prevalence of endocrine and metabolic diseases which included in neonatal screening. Knowledge of the prevalence of metabolic diseases is very important with these results, the most effective screening methods can be determined and diseases can be identified that should be added to neonatal...
Original Article
An epidemiological study on enuresis in children of two elementary schools in Suwon
Hyun Jung Lee, Kang Gyoon Lee, Eun Jin Kim, Ki-Soo Pai, Sang Don Lee
Clin Exp Pediatr. 2008;51(5):518-522.   Published online May 15, 2008
Purpose : The purpose of this study was to investigate the prevalence of enuresis in association with voiding habits and socioeconomic status in elementary school children. Methods : A dynamic survey was done of 1,514 students from two elementary schools in Suwon, Korea in December 2006. Data regarding gender, age, height and weight, voiding habits, and monthly family incomes were...
Review Article
The prevalences of asthma and allergic diseases in Korean children
Soo-Jong Hong, Kang-Mo Ahn, Soo-Young Lee, Kyu-Earn Kim
Clin Exp Pediatr. 2008;51(4):343-350.   Published online April 15, 2008
Asthma and allergic diseases are one of the most common disorders in children. Due to its increased prevalence, as well as the increased morbidity and mortality from these diseases, asthma and allergic diseases have come to be recognized as a major worldwide public health issue. In addition, socioeconomic burden of asthma and allergic diseases has increased in Korea also. The...
Original Article
Prevalence and Risk Factors of Vancomycin-Resistant Enterococci (VRE) Colonization in Neonates
Hwa Yun Lee, Gi Hwan Kim, Jin Su Choi, Sun Hee Kim, Young Youn Choi, Tai Ju Hwang
Clin Exp Pediatr. 2005;48(9):946-952.   Published online September 15, 2005
Purpose : Vancomycin-resistant enterococci(VRE) are now nosocomial pathogens in Korea. But little is known about the prevalence of stool colonization with VRE in neonates in Korea. So we studied the prevalence and risk factors of VRE colonization in the Neonatal Intensive Care Unit(NICU). Methods : From January 2000 to December 2004, the medical records of 294 neonates(127 cases of VRE group...
The Prevalence of Childhood and Adolescent Obesity in Jeju and Clinical Characteristics according to the Degree of Obesity
Jung Ho Seo
Clin Exp Pediatr. 2004;47(4):362-367.   Published online April 15, 2004
Purpose : Recently, childhood obesity has increased and became a major health concern in Korea. The aim of this study is to examine the prevalence of childhood and adolescent obesity in Jeju and to analyze clinical characteristics according to the degree of obesity. Methods : A total of 3,643 students from April 2002 to August 2002 were studied. To examine the...
Pattern of Occurrence of Mycoplasma pneumoniae Pneumonia in Admitted Children : Southern Central Korea, from 1989 to 2002
Ki Su Kang, Hyang-Ok Woo
Clin Exp Pediatr. 2003;46(5):474-479.   Published online May 15, 2003
Purpose : The determination of exposure and prevalence of Mycoplasma pneumoniae pneumonia of any region should be helpful for clinical diagnosis. We studied the pattern of occurrence of M. pneumoniae pneumonia among children living in southern central Korea during the last 13 years. This area has a relatively small population and less mobility compared with metropolitan areas. Methods : We performed...
Prevalence and Risk Factors of Candida Sepsis in Neonatal Intensive Care Unit
Ic Sun Choi, Suk Hwan Lim, Chang Yee Cho, Young Youn Choi, Tai Ju Hwang
Clin Exp Pediatr. 2002;45(7):836-846.   Published online July 15, 2002
Purpose : With the development of neonatal intensive care and the increased use of systemic antibiotics, candida sepsis has become one of the most important causes of neonatal morbidity and mortality. The purpose of this study was to investigate the prevalence rate and its associated risk factors. Methods : We retrospectively reviewed medical records of 28 cases with candida sepsis who...
The Prevalence of Obesity and Underweight in Adolescents in Incheon Area and the Relationship between Serum Cholesterol Level and Obesity
Myung Hyun Kim, Tae Wan Kim, Young Jin Hong, Byong Kwan Son, Soo Hwan Pai, Kyung Ja Chang, Soon Ki Kim
Clin Exp Pediatr. 2002;45(2):174-182.   Published online February 15, 2002
Purpose : The purpose of this study was to investigate the prevalence of obese and underweight adolescents in Incheon area and to examine the relationship between serum cholesterol level and obesity, then to assess the nutritional condition of adolescents. Methods : With a questionnaire regarding their demographic characteristics, blood samples were obtained from apparently healthy students aged 12 to 24 years...
The Annual and Seasonal Changes in the Prevalence of Rotaviral Infection from; 1993 to 1998
Young Joo Son, Hong Sun Park, Soon Lee Jung, Mira Park, Kyuchul Choeh
Clin Exp Pediatr. 2000;43(1):49-54.   Published online January 15, 2000
Purpose : Rotavirus infection is a leading cause of severe gastroenteritis among infants and young children worldwide. In temperate regions, institutional outbreaks of the disease occur mainly in cold dry weather, whereas in tropical settings its seasonal course is less well defined. We studied the annual changes in the seasonal prevalence of rotavirus infection for 5 years. Methods : The study was conducted on...
A Seroepidemiologic Study on Hepatitis A in Seoul, Korea
Dong Woon Yang, Young Ah Lee, Jung Yeon Shim, Jin Young Park, Hye Lim Jung, Moon Soo Park, Dong Hyeuk Keum
Clin Exp Pediatr. 1999;42(2):180-185.   Published online February 15, 1999
Purpose : The prevalence of hepatitis A(HAV) in a certain community reflects that community’s living standard and hygienic condition. And the pattern of HAV infection differs over time and geography, with varying widely from country to country and even within the same city. Recently a shift in prevalence has been observed in cases from childhood to adulthood. We studied HAV...
Prevalence and Clinical Features of Wolff-Parkinson-White(WPW)- Type Ventricular Preexcitation Syndrome in Children
Byung Ju Kim, Jae Sook Ma
Clin Exp Pediatr. 1998;41(9):1243-1249.   Published online September 15, 1998
Purpose : This study was conducted to establish the prevalence and clinical features of WPW- type ventricular preexcitation syndrome in children. Methods : Eighteen patients were discovered by the mass heart disease screening using ECG on 47,691 elementary school children in Kwangju from September 1992 to December 1994(group 1), and 14 patients were diagnosed at the Department of Pediatrics, Chonnam...
The Incidence of Allergic Disease among the Pediatric Outpatient
Jeong Hee Kim, Jun Hee Park, Dae Hyun Lim, Soon Ki Kim, Byong Kwan Son
Clin Exp Pediatr. 1994;37(1):9-18.   Published online January 15, 1994
The incidence of allergic disease in pediatric outpatient department of a hospital, where primary care is undertaking, was studied from Arp. 1, 1989 to Mar. 32, 1990. The results were as follows, 1) The incidence of respiratory tract disease was the highest with the value of 57.2% of the total patients, followsed by gastrointestinal tract disease (13.9%), infectious disease (6.7%), visit...
Prevalence Study of Anemia among Urban and Rural Middle School Girl Students.
Jeong Ok Hah, Mi Hwa Kang, Jeung Ho Kim
Clin Exp Pediatr. 1990;33(8):1087-1096.   Published online August 31, 1990
This study was conducted to investigate the prevalence rate of anemia and iron deficiency in pubertal girls in urban and rural areas. Venous peripheral blood was sampled from 346 girls who were randomly selected from 1,900 students of one girls’ middle school in Taegu city and all of 311 girls attending two middle schools in rural area, one in Cheungdo county and, another...
The Precalence and Trend of Obesity in Children and Adolescents.
Kyu Bum Cho, Soon Bok Park, Sang Chul Park, Dong Hwan Lee, Sang Jhoo Lee, Sung Jae Suh
Clin Exp Pediatr. 1989;32(5):597-605.   Published online May 31, 1989
The pose of this study is to survey the prevalence and trend of obesity at ages 6 to 11 in Seoul from 1984 to 1988. The number of children and adolescents comprised of 5,391 boys and 5,289 girls. Overweight was defined as weight that exceeded the standard weight for height and sex by more than 20% (relaive weight > 120%). The result was as...
Epidemiologic Study on Hepatitis B Virus Infection in Childhood.
Byoung Tae Kim
Clin Exp Pediatr. 1986;29(6):613-625.   Published online June 30, 1986
We conducted HBsAg, HBsAb and HBcAb determinations by the method of radioimmunoassay on 329 healthy children who visited for the purpose of immunization with HB vaccine, or had been admitted because of miscellaneous diseases except for liver disease from July 1984 to December 1984. The following results were obtained; 1) Among the 329 children, 16(4.9%) were positive for HBsAg. There was...
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