| table.from.odds {vcmeta} | R Documentation |
Computes the cell frequencies in a 2x2 table using the marginal proportions and odds ratio
Description
This function computes the cell proportions and frequencies in a 2x2 contingency table using the reported marginal proportions, estimated odds ratio, and total sample size. The cell frequncies could then be used to compute other measures of effect size. In the output, "cell ij" refers to row i and column j.
Usage
table.from.odds(p1row, p1col, or, n)
Arguments
p1row |
marginal proportion for row 1 |
p1col |
marginal proportion for column 1 |
or |
estimated odds ratio |
n |
total sample size |
Value
A 2-row matrix. The rows are:
Row 1 gives the four computed cell proportions
Row 2 gives the four computed cell frequencies
The columns are:
cell 11 - proportion and frequency for cell 11
cell 12 - proportion and frequency for cell 12
cell 21 - proportion and frequency for cell 21
cell 22 - proportion and frequency for cell 22
References
Bonett DG (2007). “Transforming odds ratios into correlations for meta-analytic research.” American Psychologist, 62(3), 254–255. doi:10.1037/0003-066X.62.3.254.
Examples
table.from.odds(.17, .5, 3.18, 100)
# Should return:
# cell 11 cell 12 cell 21 cell 22
# Proportion: 0.1233262 0.04667383 0.3766738 0.4533262
# Frequency: 12.0000000 5.00000000 38.0000000 45.0000000