Table 3.

Mixed Linear Model Results

	Unconditional Model, Intercept Only			Unconditional Model, Linear Effect of Time			Random Intercept Model with Main Effects Only			Random Intercept Model with Main and Interactive Effects			Random Slope Model with Main and Interactive Effects
	B	SE	95% CI	B	SE	95% CI	B	SE	95% CI	B	SE	95% CI	B	SE	95% CI
Fixed Components
Intercept	0.190***	0.011	0.169, 0.212	0.173***	0.014	0.145, 0.200	0.198	0.028	0.145, 0.251	0.204***	0.027	0.151, 0.256	0.205***	0.027	0.153, 0.256
Level 1
Stressful life events							−0.002	0.007	−0.016, 0.011	−0.007	0.007	−0.020, 0.007	−0.006	−0.008	−0.022, 0.009
Stressful life events x childhood family stress										−0.003	0.008	−0.018, 0.012	0.002	0.009	−0.015, 0.021
Time				0.003**	0.009	0.008, 0.044	0.032**	0.010	0.012, 0.052	0.032**	0.010	0.013, 0.052	0.032**	0.010	0.013, 0.050
Level 2
Stressful life events							0.017***	0.005	0.012, 0.052	0.018***	0.005	0.009, 0.027	0.018***	0.005	0.009, 0.027
Childhood family stress							0.014	0.014	−0.012, 0.040	0.026^	0.014	−0.001, 0.053	0.026^	0.014	−0.001, 0.005
Stressful life events x childhood family stress										−0.011*	0.005	−0.020, −0.003	−0.011*	0.005	−0.020, −0.002
− 1 SD										0.028***	0.007	0.016, 0.041	0.028***	0.006	0.015, 0.041
Mean										0.019***	0.005	0.009, 0.028	0.018***	0.005	0.009, 0.027
+ 1 SD										0.009	0.006	−0.003, 0.020	0.008	0.006	−0.003, 0.020
Interpregnancy interval							−0.002^	0.001	−0.004, 0.000	−0.002^	0.001	−0.004, 0.000	−0.002^	0.001	−0.004, −0.000
Relationship status							−0.013	0.027	−0.065, 0.039	−0.018	0.027	−0.069, 0.033	−0.022	0.027	−0.070, −0.031
Primiparity							−0.031	0.023	−0.076, 0.014	−0.025	0.023	−0.070, 0.019	−0.025	0.023	−0.070, 0.019
Per capita income							−0.010	0.014	−0.036, 0.016	−0.011	0.013	−0.036, 0.015	−0.011	0.013	−0.036, 0.014
Variance Components	Variance	SD		Variance	SD		Variance	SD		Variance	SD		Variance	SD
Intercept	0.006	0.077		0.006	0.080		0.005	0.070		0.005	0.070		0.007	0.081
Residual	0.023	0.153		0.024	0.154		0.023	0.152		0.022	0.150		0.018	0.132
Stressful life events													0.001	0.033
ICC			0.19			0.19			0.18			0.18			0.30
Deviance			−250.53			−252.54			−219.42			−230.73			−238.01
Log-likelihood ratio test															7.30*a

^{^}p < .10;

^*p < .05;

^**p < .01;

^***p < .001

^aLog-likelihood ratio test of whether the random slope model significantly improved model fit from the random intercept model.

Note. B = unstandardized coefficient; SE = standard error; CI = confidence interval; ICC = intraclass coefficient. Simple slopes were probed if interaction term was significant. For visual clarity, covariates are not included in the table. Models adjusted for time since study start, primiparity, income, relationship status, and interpregnancy interval. All continuous predictors and covariates were mean centered for ease of interpretation. Stressful life events were centered within cluster (Level 1) and grand mean centered (Level 2).