Body weight and standing height of children aged 2 to 17 years at the
examination, from four releases of the US National Health and Nutrition
Examination Survey (NHANES): 2013-2014, 2015-2016, 2017-2018 and
August 2021-August 2023. Used as the reference population by
sample_nhanes().
Format
A data frame with one row per child and 8 columns:
- CYCLE
NHANES release, e.g.
"2017-18".- SEQN
NHANES respondent sequence number (unique within a release).
- AGE_MONTHS
Age in months at the examination (
RIDEXAGM).- AGE
Age in whole years,
floor(AGE_MONTHS / 12).- SEX
"Male"or"Female"(RIAGENDR).- WT
Body weight in kg (
BMXWT);NAif not measured.- HT
Standing height in cm (
BMXHT);NAif not measured.- MEC_WT
Two-year MEC exam weight (
WTMEC2YR).
Source
National Center for Health Statistics, NHANES public data files
DEMO_H/BMX_H, DEMO_I/BMX_I, DEMO_J/BMX_J and
DEMO_L/BMX_L, https://wwwn.cdc.gov/nchs/nhanes/.
Details
Children are included when they have a positive two-year mobile
examination center (MEC) exam weight and at least one of body weight or
standing height. A child with only one of the two measures is kept, with
the other set to NA; sample_nhanes() uses such children only when
the missing measure is not requested.
The MEC weights are those of each individual release. They are not
combined into an official pooled weight; sample_nhanes() gives each
release an equal share, which is a modelling choice.
NHANES data are produced by the US National Center for Health Statistics
and are in the public domain. The data were built with
data-raw/nhanes_peds.R in the package source.