Converts a continuous BMI variable into a 4-level factor variable:
Underweight if [-Inf, 18.5)
, Normal weight if [18.5, 25)
,
Overweight if [25, 30)
, and Obese if [30, Inf)
.
bmi4(x, labels = TRUE)
Numeric vector of BMI values.
If TRUE
, factor levels are labeled "Underweight"
,
"Normal weight"
, "Overweight"
, and "Obese"
; if
FALSE
, factor levels are [-Inf, 18.5)
, [18.5, 25)
,
[25, 30)
, and [30, Inf)
.
Factor variable with 4 levels.