Health and Quality of Life Outcomes

Table 3 Mediational path analyses and Sobel test

From: A biopsychosocial-cultural model for understanding oral-health-related quality of life among adolescent orthodontic patients

	DV	IV	β	R²	ΔR²
PSPS-parents — PACS — PIDAQ				R² (PSPS-parents)
Step 1: Linear regression	PACS	PSPS-parents	.28^***
Step 2: Linear regression	PIDAQ	PSPS-parents	.36^***	.13
Step 3: Linear regression	PIDAQ	PSPS-parents + PACS	.32^* + .16^*	.10	0.03
Step 4: Sobel test			z = 3.04, p = .002
PSPS-peers — PACS — PIDAQ				R² (PSPS-peers)
Step 1: Linear regression	PACS	PSPS-peers	.21^***
Step 2: Linear regression	PIDAQ	PSPS-peers	.31^***	.10
Step 3: Linear regression	PIDAQ	PSPS-peers + PACS	.27^* + .19^*	.07	0.03
Step 4: Sobel test			z = 3.35, p < .001
PSPS-media — PACS — PIDAQ				R² (PSPS-media)
Step 1: Linear regression	PACS	PSPS-media	.19^***
Step 2: Linear regression	PIDAQ	PSPS-media	.21^***	.04
Step 3: Linear regression	PIDAQ	PSPS-media + PACS	.17^* + .21^*	.03	0.01
Step 4: Sobel test			z = 2.34, p = .019

DV Dependent variable, IV Independent variable
^***p < 0.001

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ISSN: 1477-7525

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