sds_2d: Calculate SDS Values for 2-dimensional matrix of covariates
In mvogel78/childsds: Data and Methods Around Reference Values in Pediatrics

Description Usage Arguments Details Value Author(s)

Calculate SDS values for 2-dimensional matrix of covariates

1 2	sds_2d(value, age, x2, sex, item, ref, type = "SDS", male = "male", female = "female")

`value`	vector of measurement values
`age`	vector of age values
`x2`	second vector of covariates
`sex`	vector of sex
`item`	name of the item e.g. "height"
`ref`	RefGroup object
`type`	"SDS" or "perc"
`male`	coding of sex for male
`female`	coding of sex for male

The function takes a vector of measurement values, and of age and a second covariate (like age and height for blood pressure) of sex and a RefGroup object as arguments. It calculates the sds or percentile values. This function is beta.

the function searches for the nearest given point in the reference grid. From there, the SDS/percentile value will be calculated. Different from sds, no interpolation will be applied. The procedure is according to Neuhauser et al. Blood Pressure Percentiles by Age and Height from Nonoverweight Children and Adolescents in Germany. 2011.

vector containing SDS or percentile values

Mandy Vogel

mvogel78/childsds documentation built on May 23, 2019, 10:55 a.m.