Calculates Blood pressure z-scores — bp

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

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

Demetris Avraam for DataSHIELD Development Team