학동기 이후의 성장 주기별 신장 및 체중 증가율에 관한 연구 = Growth Rate of Height and Weight according to Biological Growth Cycle in Late Childhood

다국어 초록 (Multilingual Abstract)

This study was carried out to know the growth rate of height and weight in Korean children which was conducted on semi-longitudinal research method. For this study, health records of the sample group that carry information for the period from their first grade of elementary school to the third grade of high school were used, 120 males and 120 females who became third grade of high school in 1994 were selected at random from each of the four cities; Seoul, Chonan, Kumi and Eumsung. Among 917 candidates, 460 males and 457 females born between March 1976 and December 1976 were finally selected as a sample for the purpose of this research.
The results are as follows;
1. Measurement of the physique
Both male and female samples showed constant growth in height and weight. Male
grew from the range of 115.8±4.8㎝ at the age of 6 to 171.5±5.6㎝ at 17 while females grew from the range of 114.6±4.7㎝ to 158.9±5.1㎝.
The Weight of males rose from the range of 19.9±2.5Kg at the age of 6 to 62.5 ±8.1Kg at 17 while that of females increased from the range of 19.3±2.4Kg to 54.1±6.9Kg.
2. Growth and Nutritional Indices
The study revealed that relative weight of the sample group increased as they grew older. The Kaup index also showed an increase in line with the advancement in their ages, and exceeded 2.0 at the age of 15 for males and at the age of 14 for females. The Rohrer index, on the other hand, showed a declining trend for the first several years but began to increase at the age of 13 for males and at the age of 11 for females.
3. Comparative analysis with similar regardless that were performed using sample groups born in 1965 and 1970 revealed the followings;
① Height
- The average height of male samples(born in 1976) under this survey was bigger
than that of male samples born in 1965 in their respective age from 6 to 17.
- The average height of male samples born in 1970 was bigger than that of male
samples born in 1970 from 6 to 14 but showed no difference after 15.
- Female samples born in 1976 showed height that was bigger than the other sample groups born in 1965 and 1970 in their respective age from 6 to 17.
② Weight
Both male and female samples under this survey weighed more than their counterpart sample groups born in 1965 and 1970 in their respective age.
4. The Maximum Growth Age was 12.3 for males and 10.4 for females. Males grew
5.92±2.77㎝ a year on an average when they were 12 and 13 years old while females grew 5.93±2.69㎝ when they were 11 and 12 years old.
In conclusion, the study revealed that like in other countries males and females experienced the second growth spurt during their adolescence and relatively slow growth thereafter. Unlike height which showed constant growth, weight varied; there were incidences where females even experienced weight loss after years of diminishing growth rate in the wake of the adolescence.