In order to assess the physical growth pattern of Korean Youth, the authors measured the body height, body weight, chestgirth and sitting height of 40967 persons (248$2 males and 16135 females) from primary schools, middle and high schools and colleges of metropolitan (urban) and rural areas, and calculated the mene, standard deviation, standard error and oefficient variance of the body weight chestgirth, sitting height and various pertinent index by body height to demonstrate the standard physical growth and development by body height of sex and age.
The following conclusions were obtained.
1. Physical growth and development: Rapid growth of physical growth in terms of body height has been observed among´ males in the age 715 and among female 7-13. Growth in terms of body height turned out to be slower among students of higher age by both sexes. The age of cross over between to sexes is between 10 to 13 years where upon girls out grows boys. Maximum annual growth were upon girls out grows boys. Maximum annual growth were both of 6.16cm from 8 to 9 years old and 12 to 13 years old for boys and 7.2cm from 8. to 9 and 6.lcm from 9 to 10 for girls. This indicates that girls enter a rapidly growing stage 2 years earlier than boys. Meanwhile, prominent improvement in body height of national students over period of ten year was noticed.
2. The distribution status of body height by age: The distribution status of body height by age
were as follows;
7 year of age: boys-30cm range of body height from 104.0cm to 133.9cm,
girls-27cm from 104.Ocm to 130.9cm
8 year of age: boys-30cm from 116.0 to 145.9cm girls-33cm; from 113.0 to 145.9cm
9 year of age: boys-39cm from 116.0 to 145.9cm girls-33c from 113.0 to 145.9cm
10 year of age: boys-39cm from 116.0 to 154.9cm girls-39cm from 119.0 to 157.9cm
it year of age: boys-45cm from 119.0 to 163.9cm girls-39cm from 122.0 to 160.9cm
12 year of age: boys-45cm from 125.0 to 169.9cm
13 year of age: boys-45cm from 128.0 to 172.9cm
girls-42cm from 125.0 to 166.9cm girls-42cm from 128.0 to 169.9cm
14 year of age: boys-48cm from 131.0 to 178.9cm girls-36c from 134.0 to 169.9cm
15 year of age: boys-42cm from 137.0 to 181.9cm girls-33c~ from 137.0 to 169.9cm
16 year of age: boys-39cm from 146.0 to 184.9cm girls-30c: m from 143.0 to 172.9cm
17 year of age: boys-39cm from 146.0 to 184.9cm girls-27cM from 143.0 to 169. 9cm
18 year of age: boys-36cm from 152.0 to 187.9cm girls-27cm from 146.0 to 172.9cm
19 year of age: boys-30cm from 155.0 to 184.9cm girls-24cm from 146.0 to 169.9cm
20 year of age: boys-24cm from 158.0 to 181.9cm girls-18cm from 149.0 to 166.9cm
3. Standard values of body weight, chest-girth and sitting height by body height of age were found all age groups from 7 to 20 years old and listed in tables from3-a to 16-a.
4. Standard values of relative body weight, relative chestgirth and relative sitting height by body height of age were found all age groups from 7 to 20 years old and listed in tables from 3-b to 16-b.
5. Standard values of physical and nutritional indices (Rohrer index, Kaup index, Vervaeck index and Pelidisi index) by body height of age were found all age groups from 7 to 20 years old and listed in tables from 3-c to 16-c.
|