nhdat: Subset of NHANES 2009 to 2010 Data for Constrained Survey...
In csurvey: Constrained Regression for Survey Data

nhdat

R Documentation

Subset of NHANES 2009 to 2010 Data for Constrained Survey Analysis

Description

A structured subset of the 2009 to 2010 NHANES data designed for illustrating constrained survey estimation methods.

Usage

data(nhdat)

Format

A data frame with 1,680 observations on the following 7 variables:

id: Cluster identifier derived from NHANES sequence number (SEQN).
chol: Binary indicator of high total cholesterol: 1 if total cholesterol > 200 mg/dL, 0 otherwise. Derived from LBXTC in TCHOL_F.XPT.
wcat: Four-level ordinal variable for waist to height ratio category, based on BMXWAIST and BMXHT from BMX_F.XPT.
gender: Gender of the participant (1 = male, 2 = female), from RIAGENDR in DEMO_F.XPT.
age: Age in years (continuous), from RIDAGEYR in DEMO_F.XPT.
wt: Sampling weight within strata, based on WTINT2YR from DEMO_G.XPT.
str: Stratum identifier, based on SDMVPSU from DEMO_G.XPT.

Details

This subset includes participants aged 21 to 45 years, selected for illustrating the estimation of the probability of high cholesterol using order constrained survey methods.