LINEARIZING THE GROWTH STANDARD TABLE OF CHILDREN AGING 36 TO 120 MONTHS

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Thông tin xuất bản: Tạp chí Khoa học Công nghệ và Thực phẩm (Tên mới: Tạp chí Khoa học Đại học Công Thương), 2020

Mô tả vật lý: tr.19

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Anthropometry at different ages released by the World Health Organization (WHO) as well as the Ministry of Health of Vietnam is using for assessing health, nutrition, and social wellbeing. It is really important for children who are at pre-school, and primary school ages. Data is tabular and applying for a jump of half-year intervals. In the case of a child’s age by month is between intervals, the height has to be calculated by deductive method. The linearizing method has been used to convert the table data into the linear equation which can be used for applying in anthropometric assessment to children who have age from 36 to 120 month -old, counting to month-old instead of by half-year jump for ages. The obtained linear equation is y = 0.49x + 79.97, whereas y is standard height corresponding to x months old of boy age. The R2 is 0.9978. By the same method and calculating procedure, the linear equation for the height of girls aging from 36 months to 120 months is y = 0.41x + 86,49. Using these equations when assessing children’s height comparing to the WHO’s standard is more convenient because the counting intervals are detailed to months instead of hafl-year as WHO’s standard table.Keywords: Linearizing, girl and boy’s height, standards of weight and height of childrenTiêu chuẩn chiều cao của trẻ em được Tổ chức Y tế thế giới (WHO) và Bộ Y tế Việt Nam công bố được sử dụng làm cơ sở đánh giá dinh dưỡng cho trẻ, nó đặc biệt quan trọng với trẻ ở lứa tuổi đang học mẫu giáo và tiểu học. Các số liệu được trình bày ở dạng bảng và tính cho tuổi tròn theo bước nửa năm. Trong trường hợp trẻ có số tháng tuổi ở khoảng giữa nửa năm theo mốc số liệu của WHO sẽ phải dùng phép nội suy. Bài báo này công bố kết quả chuyển đổi số liệu bảng thành phương trình tuyến tính áp dụng cho đánh giá nhân trắc cho bé trai từ 36 đến 120 tháng tuổi, tính theo tháng thay vì theo bước nhảy nửa năm bằng phương trình tuyến tính y = 0,49x + 79,97
trong đó, y là tiêu chuẩn chiều cao tương ứng với x là số tháng tuổi, hệ số R2 là 0,9978. Với cách tính tương tự, phương trình tuyến tính cho số liệu chiều cao chuẩn của bé gái từ 36 đến 12 tháng tuổi là y = 0,5x + 78,7. Sử dụng các phương trình tính toán được sẽ thuận lợi hơn cho việc đối chiếu chiều cao của trẻ từ 36 đến 120 tháng tuổi với tiêu chuẩn của WHO bởi có thể đối chiếu chi tiết đến từng tháng tuổi thay vì bước nhảy nửa năm như bảng số liệu của WHO.Từ khóa: Tuyến tính hóa, chiều cao của bé trai và bé gái, tiêu chuẩn về chiều cao và cân nặng của trẻ.

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