ࡱ> ac`y %bjbj a{{ hhT$N(yyyw'y'y'y'y'y'y'$<*,r'yyyyy''Tydw'yw'2K%;' h&.c'(HN( '.`-`-\;'`-;'(yyyyyyy''yyyN(yyyy`-yyyyyyyyyh : Using and interpreting the CDC Growth Charts Purpose This guide instructs health care providers on using and interpreting the revised CDC Growth Charts to assess physical growth in children and adolescents. Using the revised charts, health care providers can compare growth in children and adolescents to a nationally representative reference that includes children of all age, racial and ethnic groups. Comparing body measurements to the appropriate age and gender specific growth chart enables health care providers to monitor growth and identify potential health or nutrition related problems. During ongoing health screening, health care providers assess physical growth using weight, stature, and head circumference measurements. One measurement plotted on a growth chart can be used to screen children who may be at nutritional risk, however it does not provide adequate information to determine the childs growth pattern. When plotted correctly, a series of accurate weights and measures offer important information about a childs growth pattern. Factors such as gestational age, birth weight, and parental stature influence a childs growth pattern. For example, parental stature is considered before assuming there is a health or nutrition concern with the child. Other factors such as the presence of a chronic illness or special health care need must be considered, and further evaluation may be necessary. Step 1. Obtain accurate weights and measures Follow procedures that yield accurate measurements and use equipment that is well maintained when weighing and measuring children. Step 2. Select the appropriate growth chart Select the growth chart to use based on the age and sex of the child being weighed and measured. (Enter the childs name and the record number, if appropriate Use the charts listed below when assessing boys and girls younger than 24 months of age. Length-for-age Weight-for-age Head circumference-for-age Weight-for-Length Use the charts listed below when assessing boys and girls between 2 and 20 years of age when stature is measured. Weight-for-age Stature-for-age BMI-for age Step 3. Record Data After selecting the appropriate chart and entering the patients name and record number, complete the data entry table. In the first section of the data entry table, record information about factors that influence growth obtained at the initial visit. (Enter mother and fathers stature as reported. (Enter the gestational age in weeks. The next line is reserved for recording the childs birth data.(Omit this step when using growth charts for children aged 2-20 years.) (Enter the date of birth. (Enter birth weight, length, and head circumference. (Add notable comments. (e.g., breastfeeding) Record information obtained during the current visit. (Enter todays date. Determine age to the nearest month for infants and -year for children 2 to 20 years of age. (Enter the childs age. Example: Calculating the child=s age To calculate Sams age, subtract the birth date from the date of visit or measurement. To subtract, it may be necessary to convert months to days and years to months. When converting months to days, subtract 1 from the number of months in the date of measurement. Add 29, 30 or 31, whichever is appropriate, to the number of days. When converting years to months, subtract 1 from the number of years in the date of measurement. Add 12 to the number of months.  Year Month Day Date of Measurement 1998 (1997) 4 (15) 4 (34) Birth Date 1994 9 15 Childs age 3 6 19 Sam is 3 years, 6 months and 19 days rounded to 3 years old.  Rounding Guide Days to Month 015 days Previous month1631 daysNext monthMonth to Year 01 monthsPrevious year 24 months -year  57 months -year 810 months- year1112 monthsNext Year ( Enter weight, stature, and head circumference (if appropriate) immediately after taking the measurement. (Add any notable comments (e.g., child wearing light jacket). Step 4 Calculate BMI (Omit this step when using growth charts for children aged 024 months.) BMI is calculated using weight and stature measurements to indicate a childs weight relative to stature compared to other children of the same age and gender. (With a standard hand calculator, determine BMI using the following calculation: BMI = Weight (kg) ( Stature(cm) ( Stature(cm) X 10,000 Or BMI = Weight (lb) ( Stature(in) ( Stature(in) X 703 It is necessary to convert the weight and stature measurements to the appropriate decimal value shown below. Example: 37 lbs. 4 oz = 37.25 lbs. or 41 inches = 41.5 in. Table 1. Decimal Conversions Fraction Ounces Decimal 1/8 3/8 5/8 7/8 2 4 6 8 10 12 14 .125 .25 .375 .5 .625 .75 .875 (Enter BMI to one place after the decimal point. (Example: 18.53 = 18.5) . Step 5. Plot measurements Plot the measurements recorded in the data entry table for the current visit on the appropriate growth chart. (Find the childs age on the horizontal axis. When plotting weight-for-length, find the length on the horizontal axis. Use a straight edge to draw a vertical line up from that point. (Find the appropriate measurement (weight, length, stature, head circumference, or BMI) on the vertical axis. Use a straight edge to draw a horizontal line across from that point until it intersects the vertical line. (Make a small x where the two lines intersect. Step 6. Interpret the plotted measurements The curved lines on the growth chart show selected percentiles indicating the rank of the measure in a group of 100. For example when a cross mark is on the 95th percentile line for BMI-for-age, it means that only 5 of 100 children (5%) of the same age and sex have a higher BMI-for-age. Interpret the plotted measurements based on the percentile ranking and the corresponding nutrition indicator shown in the table below. If the percentile rank indicates a nutrition related health concern, additional monitoring and assessment is recommended. Determine the percentile rank. Determine if the percentile rank indicates a possible nutritional risk. Compare todays percentile rank with the rank from previous visits to identify any major shifts in the childs growth pattern and the need for further assessment.. Anthropometric IndicatorPercentile RankNutrition ImplicationBMI-for-Age Weight-for-Length  At or above the 95th  Overweight BMI-for-Age  Between 85th and 95th  At risk of OverweightBMI-for-Age Weight-for-Length  At or below 5th  Underweight  Stature-for-Age At or below 5th Short Stature  Head Circumference-for-Age  At or below 5th At risk of Developmental Delays References World Health Organization. Physical Status: The use and interpretation of anthropometry. WHO Technical Report Series 854. Geneva: WHO, 1995. American Academy of Pediatrics. Pediatric Nutrition Handbook. 1998; 4: 168169. Kuczmarski RJ, Ogden C, Grummer-Strawn L, et. al. CDC Growth Charts: United States. Advance Data Report No. 314. NCHS. 2000. Himes JH, Dietz WH. Guidelines for overweight in adolescent preventive services: recommendations from an expert committee. American Journal of Clinical Nutrition 1994;59:307-316. Barlow SE, Dietz WH, Obesity evaluation and treatment: expert committee recommendations. 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