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Original Article
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.
Review Article
Endocrinology
Early menarche and its consequence in Korean female: reducing fructose intake could be one solution
Ji Hyun Kim, Jung Sub Lim
Clin Exp Pediatr. 2021;64(1):12-20.   Published online May 14, 2020
In Korea, the average age of menarche has declined sharply. Early menarche is associated with psychosocial and behavioral problems and cardiometabolic disease. Excess fructose intake has been suggested as one cause of early menarche in recent studies, so reducing fructose intake may be one solution.
Effects of early menarche on physical and psychosocial health problems in adolescent girls and adult women
Jae-Ho Yoo
Clin Exp Pediatr. 2016;59(9):355-361.   Published online September 21, 2016

The menarcheal age of Korean women has been rapidly decreasing for the last 50 years, and the average menarcheal age of women born in the 1990s is approaching 12.6 years. In addition, interest in early puberty has been increasing recently owing to the rapid increase in precocious puberty. Generally, out of concern for short stature and early menarche, idiopathic central...

Original Article
A study on the menstruation of Korean adolescent girls in Seoul
Jin Chul Lee, Byung Keun Yu, Jung Hye Byeon, Kee-Hyoung Lee, Jung Hye Min, Sang Hee Park
Clin Exp Pediatr. 2011;54(5):201-206.   Published online May 31, 2011
Purpose

Westernized eating habits have been associated with early-age menstruation, which increases the incidence of dysmenorrhea and premenstrual syndrome among adolescent girls. We therefore surveyed changes in menarche timing and the general menstrual characteristics of adolescent girls in Seoul, Korea.

Methods

We surveyed 538 teenage girls who visited our hospital between July and November 2007. Items explored included age at menarche, general menstrual...

The timing of sexual maturation and secular trends of menarchial age in Korean adolescents
Mi Jung Park, In-Sook Lee, Eun-Kyung Shin, Hyojee Joung, Sung-Il Cho
Clin Exp Pediatr. 2006;49(6):610-616.   Published online June 15, 2006
Purpose : The purpose of this study was to evaluate the timing of sexual maturation and secular trends of menarchial age in Korean adolescents. Methods : Nine hundred eighty two school students and 119 university female students were included. Tanner's pubertal assessment method was applied using a self-assessment sheet with pictures for their developmental stages. A medical checkup database...
The Prevalence of Obesity, Serum Lipid Levels and Age at Menarche in Adolescent Female Athletes
Bo Young Kang, Yang Kyong Kim, Young Jin Hong, Byong Kwan Son, Kyung Ja Chang, Soon Ki Kim
Clin Exp Pediatr. 2005;48(1):21-26.   Published online January 15, 2005
Purpose : The aim of this study is to find the prevalence of obesity, the serum lipid levels and the age at menarche in adolescent female athletes and to examine the effects of exercise in adolescent stage. Methods : With a questionnaire regarding their age at menarche, physical measurement, body fat, and blood samples of the serum lipid levels to...
A Study of Menarche and Dysfunctional Uterine Bleeding in Adolescent School Girls in Ansan City
Yeon Kyeong Jung, Jae Hee Soh, Dae Hun Pee, Young Kyoo Shin, Kee Hyoung Lee, Baik Lin Eun, Sang Hee Park
Clin Exp Pediatr. 2002;45(1):16-23.   Published online January 15, 2002
Purpose : We investigated the menstrual features of adolescent school girls to know the characteristics of menarche and dysfunctional uterine bleeding in adolescents. Methods : In March, 2001, 1,434 primary and middle school girls(10-15 years of age) in Ansan City were investigated for the menacheal age and several aspects of menstruation through questionnaire. Results : Mean age of the total subjects were...
A Study on Menarchel Age and Monthly Incidence of School Girls in Ansan
Hyung Seok Kim, Jae Yong Kim, Young Kyu Shin, Sang Hee Park, Young Chang Tockgo
Clin Exp Pediatr. 1997;40(4):458-463.   Published online April 15, 1997
Purpose : Menarche is an important life event, making the transition from childhood to early womanhood. It is a significant physical and physiological event that adolescent girls feel sexual identity and it affects on psychological development. The onset of menstruation is considered a practical indication of sexual maturity in girls. On a population level, mean menarcheal age is considered to...
A Study for Menstruation of School Girl in Ansan
Ae Yeon Lim, Dae Hun Pee, Baik Lin Eun, Sang Hee Park, Soon Kyum Kim
Clin Exp Pediatr. 1994;37(11):1586-1595.   Published online November 15, 1994
Purpose : Menstruation is a great part as the procedure for physiological, psychological development and physical growth, and menstrual disorders are very common problems in adolescence period. These problems can be resolved by interview or appropriate education of normal pubertal development. However unlike other developed countries, systematic report or appropriate education for menstruation may not be performed in our country....
The Secular Trend of Menarcheal Age in Korea
Chang-Ho Hong, Hyung Rae Cho, Kye Suk Park
Clin Exp Pediatr. 1993;36(2):239-243.   Published online February 15, 1993
The age of puberty represents a very critical time in the life history of every young woman. The menarche stands as primary indicator of the onset of sexual maturation in females. According to 13.5 years of age in 1980s. This findings show a pronounced secular trend to earlier maturation. The purpose of this study is to determine (1)the average age at...
A Case of Mucinous Cystadenocarcinoma in a Premenarchal Girl.
Hong Hoe Koo, Sang Oh Na, In Sang Jeon, Hyo Seop Ahn, Wan Suk Park, Suk Koo Lee, Kwi Won Park, Chong Jai Kim, Je Geun Chi
Clin Exp Pediatr. 1990;33(1):124-128.   Published online January 31, 1990
In childhood, cancer of the ovary is highly unusual. It is responsible for only 1—2% of cancers found in patients under the age of 17. The frequency with which the various histologic types of ovarian neoplasm occur in childhood differs from that in adults. Epithelial tumors account for 70% to 80% of ovarian neoplasms in adults but only 20% in patients less than...
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