Table 4 Contingency table for odd ratio test

F _j,j=i

\(M_{11}=\sum \limits _{j\in G_{1}}c_{j1}\)

\(M_{12}=\sum \limits _{j\in G_{2}}c_{j2}\)

\(n_{1}=\sum \limits _{l=1}^{2}M_{1k}\)

F _j,j≠i

\(M_{21}=\sum \limits _{j\notin G_{1}}c_{j1}\)

\(M_{22}=\sum \limits _{j\notin G_{2}}c_{j2}\)

\(n_{2}=\sum \limits _{l=1}^{2}M_{2k}\)

Sum

\(M_{1}=\sum \limits _{j=1}^{2}M_{j1}\)

\(M_{2}=\sum \limits _{j=1}^{2}M_{j2}\)