Title Page

Contents

국문요약 7

Ⅰ. INTRODUCTION 8

Ⅱ. MATERIALS AND METHODS 10

Ⅲ. RESULTS 13

Ⅳ. DISCUSSION 19

Ⅴ. CONCLUSION 22

REFERENCES 23

Abstract 26

Table 1. Number of infants participating in the National Health Screening Program 13

Table 2. Comparisons of demographic characteristics between the infants with 2.5-3.99kg and above 4.0kg 14

Table 3. The distribution of body mass index percentile at 60 months of age and 72 months of age 17

Fig. 1. The mean percentile of (A) height, (B) weight, and (C) head circumference by age at health check-up 16

Fig. 2. distribution trends of infants with weight above the 90 th percentile by the birth weight group. 16

Fig. 3. Korean Developmental Screening Test for Infants and Children. 17