. Author manuscript; available in PMC: 2022 Oct 1.

Published in final edited form as: J Atten Disord. 2020 Jun 4;25(12):1676–1686. doi: 10.1177/1087054720925900

Table 4.

ADHD Inattentive and Hyperactive/Impulsive Symptom Dimension Mediation Models.

Outcome Variable	Predictor	β	SE	Est./SE	p	95% CI	R ²
Inattentive Symptom Dimension
Longitudinal Total Effect Model
T3 Depression	T1 ADHD-I (c)^*	.196	.082	2.386	.017	[0.032–0.356]	.238
	T1 Depression^**	.347	.078	4.462	<.001	[0.193–0.497]
	Age	.092	.062	1.478	.139	[−0.036–0.210]
	Gender	.093	.066	1.392	.164	[−0.040–0.220]
Longitudinal Mediation Path Model
T2 Dependent Stress	T1 ADHD-I (a)^**	.167	.060	2.764	.006	[0.046–0.283]	.361
	T1 Dependent Stress^**	.515	.057	9.059	<.001	[0.399–0.621]
	Age	.074	.059	1.256	.209	[−0.042–0.189]
	Gender	−.017	.053	−0.322	.748	[−0.124–0.086]
T3 Depression	T1 ADHD- I (direct effect c’)	.127	.084	1.509	.131	[−0.042–0.268]	.291
	T2 Dependent Stress (b)^**	.257	.066	3.898	<.001	[0.121–0.383]
	T1 Depression ^**	.287	.080	3.581	<.001	[0.128–0.442]
	Age	.080	.059	1.346	.178	[−0.041–0.192]
	Gender	.073	.065	1.119	.263	[−0.055–0.197]
Longitudinal Mediation Path Model Indirect Effects
T1 ADHD-I → T2 Dependent Stress → T3 Depression		.043	.020	2.196	.028^*	[0.010–0.087]
Hyperactive/Impulsive Symptom Dimension
Longitudinal Total Effect Model
T3 Depression	T1 ADHD-H (c)	.097	.080	1.205	.228	[−0.064–0.252]	.216
	T1 Depression^**	.397	.076	5.263	<.001	[0.246–0.542]
	Age	.107	.062	1.733	.083	[−0.019–0.225]
	Gender	.085	.068	1.250	.211	[−0.051–0.215]
Longitudinal Mediation Path Model
T2 Dependent Stress	T1 ADHD-H (a)^*	.115	.058	1.973	.049	[−0.001–0.228]	.349
	T1 Dependent Stress^**	.541	.058	9.390	<.001	[0.424–0.649]
	Age	.085	.059	1.447	.148	[−0.029–0.200]
	Gender	−.024	.055	−0.430	.668	[−0.134–0.085]
T3 Depression	T1 ADHD-H (direct effect c’)	.045	.078	0.577	.564	[−0.109–0.194]	.278
	T2 Dependent Stress (b)^**	.276	.067	4.089	<.001	[0.137–0.402]
	T1 Depression^**	.322	.078	4.132	<.001	[0.170–0.474]
	Age	.089	.059	1.501	.133	[−0.031–0.200]
	Gender	.065	.066	0.987	.324	[−0.064–0.193]
Longitudinal Mediation Path Model Indirect Effect
T1 ADHD-H → T2 Dependent Stress → T3 Depression		.032	.018	1.728	.084	[0.000–0.071]

Note. ADHD-I, inattentive ADHD symptoms; T1, time-point 1; T2, time-point 2; T3, time-point 3.

p < .05.

^**

p < .01. Gender coded as female=2, male=1.