bp_standardsDS {dsBase}

R Documentation

Calculates Blood pressure z-scores

Description

The function calculates blood pressure z-scores in two steps: Step 1. Calculates z-score of height according to CDC growth chart (Not the WHO growth chart!). Step 2. Calculates z-score of BP according to the fourth report on BP management, USA

Usage

bp_standardsDS(
  sex = sex,
  age = age,
  height = height,
  bp = bp,
  systolic = systolic
)

Arguments

sex	the name of the sex variable. The variable should be coded as 1 for males and 2 for females. If it is coded differently (e.g. 0/1), then you can use the ds.recodeValues function to recode the categories to 1/2 before the use of ds.bp_standards
age	the name of the age variable in years.
height	the name of the height variable in cm
bp	the name of the blood pressure variable.
systolic	logical. If TRUE (default) the function assumes conversion of systolic blood pressure. If FALSE the function assumes conversion of diastolic blood pressure.

Value

assigns a new object on the server-side. The assigned object is a list with two elements: the 'Zbp' which is the zscores of the blood pressure and 'perc' which is the percentiles of the BP zscores.

Note

The z-scores of height based on CDC growth charts are calculated by the sds function from the childsds R package.

Author(s)

Demetris Avraam for DataSHIELD Development Team

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