Task 4: How to Estimate Distributions of Usual Intake for a Single Episodically-consumed Dietary Constituent using the NCI Method

In this example, the distribution of the percent of usual energy intake from saturated fat in men will be estimated.

This example uses the demoadv dataset (download at Sample Code and Datasets).   The variables w0304_0 to w0304_16 are the weights (dietary weights and Balanced Repeated Replication [BRR] weights) used in the analysis of 2003-2004 dietary data that requires the use of BRR to calculate standard errors. The model is run 17 times, including 16 runs using BRR (see Module 18, task 4 for more information).  BRR uses weights w0304_1 to w0304_16.  (Note: if 4 years of NHANES data are used, 32 BRR runs are required. Additional weights are found in the demoadv dataset.)

IMPORTANT NOTE

Note: If 4 years of NHANES data are used, 32 BRR runs are required. Additional weights are found in the demoadv dataset.

uld not be expected to vary by more than 1%.