${\mathrm{n}}_1^{\text{OC}}$	Number of OC individuals with the variable of interest
${\mathit{n}}_{\mathit{0}}^{\mathit{OC}}$	Number of OC individuals without the variable of interest
${\mathit{n}}_{\mathit{1}}^{\mathit{NOC}}$	Number of non‐OC individuals with the variable of interest
${\mathit{n}}_{\mathit{0}}^{\mathit{NOC}}$	Number of non‐OC individuals without the variable of interest