Table 3. Parameter estimates (95% confidence interval) for independence models.

Parameter	Model 9	Model 3	Model 6
X1	7.97 (6.1, 10.8)
X2	6.13 (3.9, 10.2)	7.32 (4.4, 12.5)	6.5 (3.9, 11.5)
X3	4.54 (2.9, 7.4)	5.10 (3.1, 8.8)	4.6 (2.8, 8.0)

Nuisance parameter estimates were as follows: model 3, p₁₅ = 0.97 (0.9, 1.0), p₁₄ = 0.73 (0.6, 0.8), p₁₃ = 0.11 (0.1, 0.2), p₁₂ = 0.01 (0.004, 0.02), p₁₁ = 0.00 (0.0, 0.01); model 6, α = -10.4 (-12.2, -8.9), β = 2.8 (2.4, 3.3); model 9, p₁₁ = 0.002 (0.0, 0.01).