lird

Likelihood interval for risk difference of 2-by-2 contingency table. Likelihood function plot is also shown. For faster calculation speed, plot option '0' is recommended.

Currently used CI method has its limitation when the test statistics are asymmetrical (chi-square test, F-test) or the model functions are non-linear. It can be overcome by using the likelihood functions for the interval estimation. 'inteli' package now supports interval estimation for the mean, variance, variance ratio, binomial distribution, Poisson distribution, odds ratio, risk difference, relative risk and their likelihood function plots. Testing functions are also provided.

Kim Minkyu

inteli

Interval Estimation by Likelihood Method

Minkyu Kim

Kyun-Seop Bae

lird function

<dl> <dt>exposure.O_event.O</dt>
<dd>a numeric vector of exposure (+) and event (+), 'a' of 2-by-2 table; mandatory</dd> <dt>exposure.O_TOTAL</dt>
<dd>a numeric vector of exposure (+), 'a' + 'b' of 2-by-2 table; mandatory</dd> <dt>exposure.X_event.O</dt>
<dd>a numeric vector of exposure (-) and event (-), 'c' of 2-by-2 table; mandatory</dd> <dt>exposure.X_TOTAL</dt>
<dd>a numeric vector of exposure (-), 'c' + 'd' of 2-by-2 table; mandatory</dd> <dt>plot</dt>
<dd>likelihood function plots by LI; default is "all". 'OBJ', 'O1', '1' is objective function plot; 'OFV', 'O2', '2' is log likelihood function plot; 'LRT', 'O3', '3' is log LRT function plot.</dd> <dt>conf.level</dt>
<dd>confidence level for the interval estimation</dd> <dt>eps</dt>
<dd>machine epsilon value; default is 1e-08</dd> <dt>k</dt>
<dd>cutoff value for likelihood interval. If not specified, F-test is used.</dd></dl>

Arguments

Kyun-Seop Bae &lt;k@acr.kr&gt;, Minkyu Kim &lt;mkim@acr.kr&gt;

Author

Likelihood Interval for Risk Difference of 2-by-2 Contingency Table. — lird

<dl>

 <dt>exposure.O_event.O</dt>
<dd>a numeric vector of exposure (+) and event (+), 'a' of 2-by-2 table; mandatory</dd>

 <dt>exposure.O_TOTAL</dt>
<dd>a numeric vector of exposure (+), 'a' + 'b' of 2-by-2 table; mandatory</dd>

 <dt>exposure.X_event.O</dt>
<dd>a numeric vector of exposure (-) and event (-), 'c' of 2-by-2 table; mandatory</dd>

 <dt>exposure.X_TOTAL</dt>
<dd>a numeric vector of exposure (-), 'c' + 'd' of 2-by-2 table; mandatory</dd>

 <dt>plot</dt>
<dd>likelihood function plots by LI; default is "all". 'OBJ', 'O1', '1' is objective function plot; 'OFV', 'O2', '2' is log likelihood function plot; 'LRT', 'O3', '3' is log LRT function plot.</dd>

 <dt>conf.level</dt>
<dd>confidence level for the interval estimation</dd>

 <dt>eps</dt>
<dd>machine epsilon value; default is 1e-08</dd>

 <dt>k</dt>
<dd>cutoff value for likelihood interval. If not specified, F-test is used.</dd>

</dl>

lird: Likelihood Interval for Risk Difference of 2-by-2 Contingency Table.

Description

Value

Arguments

Author

Examples