Add categories of Body Mass Index (BMI = weight in kilograms divided by the square of height in meters).
utlede_bmi_klasse(df)
Returns df
with 2 new columns: bmi_klasse
and bmi_over35
df <- data.frame(bmi_manual = c(15, 15.2, 19, 25, 26.7, 32.1, 41.0, NA))