sev: Calculate summary exposure value

In cfree14/nutriR: Nutritional intake functions for R

Calculate summary exposure value

Description

This function calculates the summary exposure value (SEV), i.e., the percent of a population with inadequate nutrient intakes, for a group based on its Estimated Average Requirement (EAR) and its habitual intake distribution. It uses the probability method (NRC 1986). A CV of 0.25 is recommended for the EAR of Vitamin B12 and a CV of 0.10 is recommended for the EAR of all other nutrients (Renwick et al. 2004).

Usage

sev(
  ear,
  cv,
  mean = NULL,
  sd = NULL,
  shape = NULL,
  rate = NULL,
  meanlog = NULL,
  sdlog = NULL,
  plot = F
)

Arguments

ear	Estimated Average Requirement (EAR)
cv	Coefficient of variation (CV) of the EAR
mean	Mean for normal distribution
sd	Standard deviation for normal distribution
shape	Shape parameter for gamma distribution
rate	Rate parameter for gamma distribution
meanlog	Mean parameter for gamma distribution
sdlog	Standard deviation parameter for gamma distribution
plot	Boolean (TRUE/FALSE) indicating whether to plot the distributions relative to the EAR

Value

The percent of a population with inadequate nutrient intakes (SEV)

References

National Research Council (1986) Nutrient Adequacy: Assessment Using Food Consumption Surveys. Washington, DC: The National Academies Press. https://doi.org/10.17226/618.

Renwick AG, Flynn A, Fletcher RJ, Müller DJ, Tuijtelaars S, Verhagen H (2004) Risk-benefit analysis of micronutrients. Food and Chemical Toxicology 42(12): 1903-22. https://doi.org/10.1016/j.fct.2004.07.013

Examples

sev(ear=8.1, cv=0.1, mean=8.5, sd=1.3, plot=T)
sev(ear=8.1, cv=0.1, shape=9.5, rate=1.3, plot=T)
sev(ear=8.1, cv=0.1, meanlog=1.9, sdlog=0.3, plot=T)

cfree14/nutriR documentation built on Oct. 31, 2024, 6:27 p.m.