Investigation of cut off of Height, Weight and Body Mass Index (BMI) in Healthy 6-11-year-Old Yazd City 2016-2017

One of the applicable methods in determination of nutritional status and health is surveillance and assessment of physical growth. The attention to growth of children can be determined failure to thrive and malnutrition in primary period of life. The aim of this study was to determine of cut off the height, weight and BMI of the children6-11 year-old in the city of Yazd, Iran and comparison with NCHS standards. In this cross-sectional study,2592 students (6-11 years old) were selected by cluster sampling in 26 primary schools and all students in one class from each grade in the academic year2016-2017 inYazd–Iran.Height,weight and body mass index (BMI)of the children were measured. Using the LMS software, the height, weight and body mass index by ageand sex were analyzed and compared with the WHO standards. height ,weight and BMI percentiles tables and curves of both sex were close to NCHS standards features. The 97 percentiles of height for age of boys, 97 percentiles of BMI in both sex , 97 and 75 percentiles weight for age in boys aged over 9 years and same percentiles in girls aged over 7 years were higher than foreign standards. Due to the differences seen between the curves for height, weight and BMI in and it is better to use the norms of this study for Yazdian children 6-11 years old.