TABLE 3 |.

Indices of model fit.

Group	Model	X2	DF	P	CFI	TLI	RMSEA	AICi	Δi(AIC)	wi(AIC)
Mothers	No Growth	18.521	11	0.070	0.687	0.829	0.070	1400.279	3.23	0.155
	Linear	9.929	8	0.318	0.946	0.960	0.034	1397.049	0	0.778
	Non-linear	10.194	6	0.117	0.825	0.825	0.070	1401.951	4.90	0.067
Fathers	No Growth	17.246	11	0.101	0.766	0.872	0.063	1524.841	4.68	0.088
	Linear	15.021	8	0.059	0.737	0.803	0.079	4319.349	2799.20	0
	Non-linear	6.537	6	0.366	0.980	0.980	0.025	4314.865	2794.71	0
	CNL	6.565	8	0.584	1.000	1.040	0.000	1520.160	0	0.912
Bivariate	Linear/CNL	30.616	28	0.165	0.935	0.924	0.044	2880.914	–	–

Rows in bold indicate the model with best comparative fit (as determined through comparative fit indices) for each observed group [Mothers, Fathers, or the Dyad (Bivariate)]. Models include patterns of no growth, linear growth, non-linear growth, corrected non-linear (CNL) growth and/or a Linear/CNL Mix. Analyses of Cluster 2 are not given; for the mother, father, and dyad, the addition of covariates of litter size and parental age yielded models with exceptionally poor fit/non-converging models. In order from left to right, model fit indices presented are chi-square statistic (X² ), degrees of freedom (DF), p-value (P), Comparative Fit Index (CFI), Tucker-Lewis Index (TLI), Root Mean Square Error of Approximation (RMSEA), Akaike’s Information Criterion (AIC_i), Δ_I(AIC), and Akaike Weights [w_i(AIC)].