cdc2000 | R Documentation |

The CDC growth reference (Kuczmarski et al 2000) for height, weight, body mass index and head circumference, fitted by the LMS method and summarised by values of L, M and S by sex from birth to 19 years.

```
cdc2000
```

A tibble with 484 observations on the following 14 variables:

- years
age from 0 to 19 years

- L.ht
numeric vector

- M.ht
numeric vector

- S.ht
numeric vector

- L.wt
numeric vector

- M.wt
numeric vector

- S.wt
numeric vector

- L.bmi
numeric vector

- M.bmi
numeric vector

- S.bmi
numeric vector

- L.hc
numeric vector

- M.hc
numeric vector

- S.hc
numeric vector

- sex
two-level factor with level 1 male and level 2 female

BMI starts at 2 years, and head circumference stops at 3 years.

The L, M and S values for each measurement correspond respectively to the
Box-Cox power, median and coefficient of variation of the distribution by
age and sex (Cole & Green 1992). The short names and units for each measurement
(see `LMS2z`

) are as follows: height (ht, cm), weight (wt, kg),
body mass index (bmi, kg/m2), head circumference (hc, cm).

Cole TJ, Green PJ. Smoothing reference centile curves: the LMS method and penalized likelihood. Stat Med 1992;11:1305-19.

Kuczmarski RJ, Ogden CL, Guo SS, Grummer-Strawn LM, Flegal KM, Mei Z, Wei R, Curtin LR, Roche AF, Johnson CL. 2000 CDC growth charts for the United States: methods and development. Vital Health Stat, 2002, 11, 246, 1-190.

```
data(cdc2000)
## calculate 98th centile for weight in girls from birth to 19 years
round(
setNames(
LMS2z(x = 0:19, y = 2, sex = 2, measure = 'wt', ref = 'cdc2000',
toz = FALSE), 0:19), 1)
```

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