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	Healthy	Diseased
Treatment	$N_{TH}$	$N_{TD}$
Control	$N_{CH}$	$N_{CD}$

With these tabulations, we can also define the probability of developing the disease in the treatment and control groups: ${\begin{array}{ll}P_{C}=&{\frac {N_{CD}}{N_{CD}+N_{CH}}}\\P_{T}=&{\frac {N_{TD}}{N_{TD}+N_{TH}}}\end{array}}$


Name (symbol)	Equation
Cramér's V, Cramér's phi (φ_c)	${\sqrt {\frac {\chi ^{2}}{N(k-1)}}}$
Phi coefficient (φ)	${\sqrt {\frac {\chi ^{2}}{N}}}$
Odds ratio (OR)	${\frac {N_{TD}/N_{TH}}{N_{CD}/N_{CH}}}$	The odds of developing the disease given the treatment
Relative risk (RR), risk ratio	${\frac {N_{TD}/(N_{TH}+N_{TD})}{N_{CD}/(N_{CH}+N_{CD})}}=P_{T}/P_{C}$
Risk difference (RD)	${\frac {N_{TD}}{N_{TH}+N_{TD}}}-{\frac {N_{CD}}{N_{CH}+N_{CD}}}=P_{T}-P_{C}$
Cohen's h	$2\left(\arcsin {\sqrt {\frac {N_{TD}}{N_{TH}+N_{TD}}}}-\arcsin {\sqrt {\frac {N_{CD}}{N_{CH}+N_{CD}}}}\right)=2\left(\arcsin {\sqrt {P_{T}}}-\arcsin {\sqrt {P_{C}}}\right)$