Table 6.

Comparison of observed and equated mean Parental Stress scores in parent education groups for the behavior sample and child age groups for the ordinary sample

Samples and subgroups (n)	Observed scores		Adjusted scores		Bias
	Mean	SE	Mean	SE
Behavior sample
Parent educationa
Secondary or less (148)	5.10	.17	5.10	.17	.00
Tertiary (86)	5.21	.22	5.63	.23	−.42
Ordinary sample
Child age groupsb
2–5 years (174)	4.75	.15	4.75	.15	.00
6–10 years (201)	4.18	.13	4.10	.13	.09
11–18 years (196)	3.35	.14	3.14	.14	.22

SE Standard error.

^aDifferences in observed mean scores (χ² (1) = 0.2, p = 0.696), and adjusted mean scores (χ² (1) = 3.5, p = 0.062)

^bDifferences in observed mean scores (χ² (2) = 48.7, p < .001), and adjusted mean scores (χ² (2) = 61.8, p < .001)