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epiR (version 2.0.78)

Tools for the Analysis of Epidemiological Data

Description

Tools for the analysis of epidemiological and surveillance data. Contains functions for directly and indirectly adjusting measures of disease frequency, quantifying measures of association on the basis of single or multiple strata of count data presented in a contingency table, computation of confidence intervals around incidence risk and incidence rate estimates and sample size calculations for cross-sectional, case-control and cohort studies. Surveillance tools include functions to calculate an appropriate sample size for 1- and 2-stage representative freedom surveys, functions to estimate surveillance system sensitivity and functions to support scenario tree modelling analyses.

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Version

Install

install.packages('epiR')

Monthly Downloads

15,167

Version

2.0.78

License

GPL (>= 2)

Maintainer

Last Published

December 10th, 2024

Functions in epiR (2.0.78)

Lip cancer in Scotland 1975 - 1980

The library epiR: summary information

Concordance correlation coefficient

Confidence intervals for means, proportions, incidence, and standardised mortality ratios

Write matrix to an ASCII raster file

Number of parameters to be inferred and number of informative priors required for a Bayesian latent class model

Summary measures for count data presented in a 2 by 2 table

R to WinBUGS data conversion

An R version of Wes Johnson and Chun-Lung Su's Betabuster

Bohning's test for overdispersion of Poisson data

Covariate pattern residuals from a logistic regression model

Extract unique covariate patterns from a data set

Estimate the precision of a [structured] heterogeneity term

Empirical Bayes estimates of observed event counts

Estimated dissemination ratio

Directly adjusted incidence rate estimates

Decimal degrees and degrees, minutes and seconds conversion

Convert British National Grid georeferences to easting and northing coordinates

epi.descriptives

Descriptive statistics

Mixed-effects meta-analysis of binary outcomes using the DerSimonian and Laird method

Estimate the characteristics of diagnostic tests applied at the herd (group) level

Kappa statistic

Event instantaneous hazard based on Kaplan-Meier survival estimates

Rates of use of epidural anaesthesia in trials of caregiver support

Fixed-effects meta-analysis of binary outcomes using the Mantel-Haenszel method

Lactation to date and standard lactation milk yields

Fixed-effects meta-analysis of binary outcomes using the inverse variance method

epi.indirectadj

Indirectly adjusted incidence risk estimates

Laryngeal and lung cancer cases in Lancashire 1974 - 1983

epi.interaction

Relative excess risk due to interaction in a case-control study

Estimate herd test characteristics when pooled sampling is used

Estimate population size on the basis of capture-recapture sampling

Create offset vector

An R version of the Winton Centre's RealRisk calculator

Partial rank correlation coefficients

Proportional similarity index

Estimate true prevalence and the expected number of false positives

Fixed-effects meta-analysis of continuous outcomes using the standardised mean difference method

Post-test probability of disease given sensitivity and specificity of a test

Overall concordance correlation coefficient (OCCC)

Confidence intervals and tests of significance of the standardised mortality [morbidity] ratio

epi.ssclus1estb

Sample size to estimate a binary outcome using one-stage cluster sampling

epi.ssclus1estc

Sample size to estimate a continuous outcome using one-stage cluster sampling

Sample size, power or minimum detectable incidence risk ratio for a cohort study using individual count data

Sample size and power when comparing binary outcomes

epi.ssclus2estb

Number of clusters to be sampled to estimate a binary outcome using two-stage cluster sampling

Sample size, power or minimum detectable incidence rate ratio for a cohort study using person or animal time data

Sample size and power when comparing continuous outcomes

Sample size, power or minimum detectable odds ratio for an unmatched or matched case-control study

epi.ssclus2estc

Number of clusters to be sampled to estimate a continuous outcome using two-stage cluster sampling

Sample size for a non-inferiority trial, binary outcome

Sample size and power when comparing time to event

epi.sssimpleestc

Sample size to estimate a continuous outcome using simple random sampling

Sample size for a parallel equivalence or equality trial, binary outcome

epi.sssimpleestb

Sample size to estimate a binary outcome using simple random sampling

Sample size for a non-inferiority trial, continuous outcome

Sample size to detect an event

Sample size for a parallel equivalence or equality trial, continuous outcome

Sample size to estimate the sensitivity or specificity of a diagnostic test

Adjusted risk values

epi.ssstrataestc

Sample size to estimate a continuous outcome using a stratified random sampling design

Sensitivity and specificity of diagnostic tests interpreted in series or parallel

Sample size, power or minimum detectable prevalence ratio or odds ratio for a cross-sectional study

Sample size to validate a diagnostic test in the absence of a gold standard

Sensitivity, specificity and predictive value of a diagnostic test

epi.ssstrataestb

Sample size to estimate a binary outcome using stratified random sampling

Effective probability of disease

Sample size for a parallel superiority trial, binary outcome

Sample size for a parallel superiority trial, continuous outcome

rsu.sep.rbvarse

Surveillance system sensitivity assuming risk based sampling and varying unit sensitivity

Surveillance system sensitivity assuming risk-based sampling on one risk factor

Surveillance system sensitivity assuming risk-based sampling on two risk factors

Equilibrium probability of disease freedom assuming representative or risk based sampling

Probability that the prevalence of disease in a population is less than or equal to a specified design prevalence

Surveillance system sensitivity assuming risk based, two-stage sampling

Surveillance system sensitivity assuming passive surveillance and representative sampling within clusters

Surveillance system sensitivity assuming risk-based sampling and varying unit sensitivity

Surveillance system sensitivity assuming data from a population census

Surveillance system sensitivity assuming representative sampling, imperfect pooled sensitivity and perfect pooled specificity

Calculate the probability of freedom for given population sensitivity and probability of introduction

rsu.sssep.rb2st1rf

Sample size to achieve a desired surveillance system sensitivity assuming risk-based 2-stage sampling on one risk factor at the cluster level

rsu.sep.rsfreecalc

Surveillance system sensitivity for detection of disease assuming representative sampling and imperfect test sensitivity and specificity.

Surveillance system sensitivity assuming representative sampling

rsu.sep.rsvarse

Surveillance system sensitivity assuming representative sampling and varying unit sensitivity

Surveillance system sensitivity by combining multiple surveillance components

Design prevalence back calculation

rsu.sssep.rb2st2rf

Sample size to achieve a desired surveillance system sensitivity assuming risk-based 2-stage sampling on two risk factors at either the cluster level, unit level, or both

Surveillance system sensitivity assuming representative two-stage sampling

Sample size to achieve a desired probability of disease freedom assuming representative sampling

rsu.sssep.rsfreecalc

Sample size to achieve a desired surveillance system sensitivity to detect disease at a specified design prevalence assuming representative sampling, imperfect unit sensitivity and specificity

Surveillance system specificity assuming representative sampling

Sample size to achieve a desired surveillance system sensitivity assuming representative sampling

rsu.sssep.rspool

Sample size to achieve a desired surveillance system sensitivity using pooled samples assuming representative sampling

rsu.sssep.rs2st

Sample size to achieve a desired surveillance system sensitivity assuming two-stage sampling

rsu.sssep.rbmrg

Sample size to achieve a desired surveillance system sensitivity assuming risk-based sampling and multiple sensitivity values within risk groups

rsu.sssep.rbsrg

Sample size to achieve a desired surveillance system sensitivity assuming risk-based sampling and a single sensitivity value for each risk group