R: NHANES Data : National Health and Nutrition Examination...
NHANES
R Documentation
NHANES Data : National Health and Nutrition Examination Survey
Description
This is a somewhat large interesting dataset, a data frame of 15
variables (columns) on 9575 persons (rows).
Usage
data(NHANES)
Format
This data frame contains the following columns:
Cancer.Incidence
binary factor with levels No and Yes.
Cancer.Death
binary factor with levels No and Yes.
Age
numeric vector giving age of the person in years.
Smoke
a factor with levels Current, Past,
Nonsmoker, and Unknown.
Ed
numeric vector of {0,1} codes giving the education level.
Race
numeric vector of {0,1} codes giving the
person's race.
Weight
numeric vector giving the weight in kilograms
BMI
numeric vector giving Body Mass Index, i.e.,
Weight/Height^2 where Height is in meters, and missings
(61% !) are coded as 0 originally.
Diet.Iron
numeric giving Dietary iron.
Albumin
numeric giving albumin level in g/l.
Serum.Iron
numeric giving Serum iron in ug/l.
TIBC
numeric giving Total Iron Binding Capacity in ug/l.
Transferin
numeric giving Transferin Saturation which is just
100*serum.iron/TIBC.
Hemoglobin
numeric giving Hemoglobin level.
Sex
a factor with levels F (female) and M (male).
Examples
data(NHANES)
summary(NHANES)
## Missing Data overview :
nNA <- sapply(NHANES, function(x)sum(is.na(x)))
cbind(nNA[nNA > 0])
# Which are just these 6 :
## Not run:
Diet.Iron 141
Albumin 252
Serum.Iron 1008
TIBC 853
Transferin 1019
Hemoglobin 759
## End(Not run)