X_i

Y = 1 = case

Y = 0 = non case

∑_j

X = 1 = exposed

a₃ = 62

b₃ = 210

n₁₃ = 272

X = 0 = non exposed

c₃ = 24

d₃ = 102

n₀₃ = 126

∑_i

m₁₃ = 86

m₀₃ = 312

T₃ = 398