Electronic Media Exposure and Use among Toddlers

OBJECTIVE: These days, young children are exposed to a wide range of smart devices and their usage of smart devices is rapidly increasing worldwide. However, the use of smart devices by young children has not been studied in detail yet because smart device is relatively recent. The purpose of this study was to investigate the exposure status of smart devices among 2–5 years old children in Korea. METHODS: Four hundred parents of 2- to 5-year-old children were invited to enroll. Data on demographic information and the frequency of media use, time of media use, age at first use of media was self-reported. RESULTS: Among 390 toddlers, 39.3% watched TV almost every day, while 12.0% of children used smartphone on a daily basis. During weekdays, 48% of the children watched TV for over an hour. On weekends, 63.1% of the children watched TV for over an hour. On weekends, 23.4% of children use their smartphones for over an hour. Children using smartphones before 24 months of age were 31.3%. CONCLUSION: Research has shown that TV and smartphones are the most popular digital devices used by toddlers. Most toddlers began using smart devices at 12–24 months. This study provides comprehensive information on children’s contemporary use of media.

Effect of Repeated Oral Health Education on the Oral Health of Preschool Children / 치위생과학회지

This study aimed to investigate the effect of repeated oral health education on the oral health of preschool children. This study classified the control group of children of 5~6 years of age where the oral health education was conducted one time, and the experiment group where the oral health education was conducted 4 times. The oral health conditions of each group and their risk of developing dental caries were also assessed. No significant difference was observed in the participants in terms of general characteristics, oral health conditions, risk of developing dental caries, and oral health behavior after oral health education. The two groups did not show a significant difference (p<0.001) in dental plaque index before and after oral health education, and showed a significant difference (p<0.001) according to the number of education sessions. Before oral health education, the participants in both groups were brushing their teeth incorrectly. However, after the third session, 56.7% of the participants in the experimental group and 9.4% in the control group used the correct method of tooth brushing. A significant difference was observed between the two groups (p<0.05). In addition, when the tooth-brushing time was compared, the two groups showed a significant difference (p<0.001), and a significant difference was observed in terms of the number of education sessions (p<0.05). In summary, repeated oral health education had significant influences on the dental plaque index, tooth-brushing method, brushing occlusal surfaces, and tooth-brushing time. Therefore, when oral health education is carried out, repeated oral health education in children is more effective than one-time oral health education as reflected in the changes in dental plaque index and oral health behavior. Moreover, oral health education is considered effective in changing the oral health behavior of children when conducted at least 3 times.

Psychopathology Associated with Participant Role among Bullying Situation / 신경정신의학

OBJECTIVES: In recent years, school violence has been increasing and this situation is complicated by various factors. The objective of this study is to explore the distribution of the participants' roles and to examine the psychopathology associated with these roles among middle school students. METHODS: In a cross-sectional study, 490 middle school students completed the Participant Role Questionnaire (PRQ) for classifying the participants' roles in a bullying situation. The Korean-Youth Self Report (K-YSR), Revised Children's Manifest Anxiety Scale (RCMAS), Rosenberg Self-Esteem Scale (RSE) and Parent Adolescent Communication Inventory (PACI) were also included to evaluate the psychopathology of the students. RESULTS: The distribution rates of the bully, assistant, reinforcer, defender and outsider groups were 4.1%, 3.1%, 5.3%, 53.7%, and 32.0%, respectively. Among the syndrome scales of K-YSR, almost each items' and the total scores (p=0.049), RCMAS (p=0.000), PACI (p=0.000), and RSE (p=0.000) were significantly different among all group. The average scores on the K-YSR and RCMAS were the highest in the assistant and reinforcer groups. CONCLUSION: The assistant and reinforcer groups showed more severe psychopathologies. This means that they suffered from more difficulties than the other groups. Therefore, they need more intensive therapeutic interventions. Except for the defender group, who prevented bullying, the outsider group was the largest group. Therefore, a comprehensive approach that can change outsiders to defenders should be employed for the prevention of bullying in adolescents.

Psychopathology Associated with Cyberbullying among Middle School Students / 신경정신의학

OBJECTIVES: Cyberbullying has recently become a major concern in Korea and especially poses a serious threat to adolescents. The object of this study is to examine the psychopathology of perpetrators and victims of cyberbullying. METHODS: In a cross-sectional study, 490 middle school students completed questionnaires on bullying and victimization experiences in cyberspace. Korean-Youth Self Report (K-YSR) was included to evaluate the psychopathology of the students. RESULTS: The prevalence rates of victims and perpetrators of cyberbullying were 6.92% and 3.33%, respectively. Among 9 sub-scales of K-YSR, the scores of depressed/anxious (p=0.049), thought problems (p=0.002), and attention problems (p=0.039) were significantly different between victim, perpetrator, victim/perpetrator, and control group. Multinomial logistic regression indicated that the victim group was associated with depressed/anxious [odds ratio (OR)=1.10], social immaturity (OR=1.24), thought problems (OR=1.32), and self-destructive identity problems (OR=1.16). The perpetrator group was associated with thought problems (OR=1.37) and attention problems (OR=1.21). The victim/perpetrator group was associated with delinquent behavior (OR=2.04). CONCLUSION: Middle school students involved in cyberbullying were associated with psychopathologies including depression, anxiety, thought problems, attention problems, and delinquent behaviors. The risk of cyberbullying is escalating with the rapid advancement in technology. Therefore, a comprehensive approach should be employed for prediction and prevention of cyberbullying in adolescents.

A clinical survey of prematurity

A clinical observation was performed on 2,122 cases of premature infants who were admitted to Ilsin Christian during the past 5 years from Jan. 1986 to Dec. 1990. The results were as follows; 1) The incidence of prematurity was 5.7%, overall mortality rate was 15.8%, and the sex ratio of male to female was 1.5:1. 2) Concomitant maternal diseases were premature rupture of membrane 457 cases (21.5%), preeclampsia & eclampsia 424 cases (19.9%), multiple pregnancy 250 cases (11.7%) etc, in the order of frequency. 3) Prematurity was most prevalent among multipara over 3. 4) Incidence of prematurity according to maternal age was frequent in woman more than 35 years old. 5) Mortality of prematurity was higher inversely propotional to birth weight & gestational age. 6) Main causes of death were IRDS 45 cases (43%), congenital anomaly 72 cases (21.6%), sepsis 31 cases (9.3%), and unknown 84 cases (25.0%). 7) Clinical problems were hyperbilirubinemia 38.9%, hypoglycemia 28.6%, IRDS 18%, sepsis & other infections 8.1% etc, in the order of frequency. 8) Most deaths were seen within first 24hr (74.5%).