Table 2.

Segregation analysis – Parameter estimates, log-likelihood and AIC associated with the general autosomal mode of transmission and the general, dominant and recessive X-linked modes of transmission.

	Autosomal	X-linked
	General	General	Dominant	Recessive
q2	0.39	0.39	0.54	0.46
f11	0.38	0.29	1	0
f12	0.31	0	0	= f11
f22	0.41	0.88	= f12	1
No.	4	3	1	1
-2 lnL	102.6	82.4	87	87
AIC	110.6	88.4	89	89
χ2(df)			4.6(2)	4.6(2)
P			0.10	0.10

q₂: frequency of the risk allele 2; f₁₁, f₁₂, f₂₂: penetrances of genotypes 11, 12 and 22. No.: No. of independent parameters estimated = (no. of parameters in the model)-(no. of parameters that converged to a boundary); lnL: log-likelihood; AIC: Aikaike criterion (-2 lnL + 2 No). χ² (df): chi-squared test comparing the general X-linked model with the restricted X-linked models. P: associated p-value.