View source: R/get_weight_class.R
get_weight_class | R Documentation |
Given vectors of age, BMI, recumbent length, weight, and gender, categorizes weight classes using CDC and WHO categories.
get_weight_class(age_years, age_months, bmi, recumlen, weight, gender)
age_years |
A vector of ages in years. |
age_months |
A vector of ages in months. |
bmi |
A vector of BMIs. |
recumlen |
A vector of heights or recumbent lengths in cm. |
weight |
A vector of body weights in kg. |
gender |
A vector of genders (as 'Male' or 'Female'). |
According to the CDC (https://www.cdc.gov/ncbddd/disabilityandhealth/obesity.html), adult weight classes are defined using BMI as follows:
BMI less than 18.5
BMI between 18.5 and 25
BMI between 25 and 30
BMI greater than 30
For children ages 2 years and older, weight classes are defined using percentiles of sex-specific BMI for age, as follows (Barlow et al., 2007):
Below 5th percentile BMI for age
5th-85th percentile BMI for age
85th-95th percentile BMI for age
Above 95th percentile BMI for age
For children birth to age 2, weight classes are defined using percentiles of sex-specific weight-for-length (Grummer-Strawn et al., 2009). Weight above the 97.7th percentile, or below the 2.3rd percentile, of weight-for-length is considered potentially indicative of adverse health conditions. Here, weight below the 2.3rd percentile is categorized as "Underweight" and weight above the 97.7th percentile is categorized as "Obese."
A character vector of weight classes. Each element will be one of 'Underweight', 'Normal', 'Overweight', or 'Obese'.
Caroline Ring
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Barlow SE. Expert committee recommendations regarding the prevention, assessment, and treatment of child and adolescent overweight and obesity: summary report. Pediatrics. 2007;120 Suppl 4. doi:10.1542/peds.2007-2329C
Grummer-Strawn LM, Reinold C, Krebs NF. Use of World Health Organization and CDC growth charts for children Aged 0-59 months in the United States. Morb Mortal Wkly Rep. 2009;59(RR-9). https://www.cdc.gov/mmwr/preview/mmwrhtml/rr5909a1.htm
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