Appendix Table 2.

Results of regression analyses for all characteristics tested as potential predictors of different aspects of affiliate stigma (N = 407)

Characteristic	Affective affiliate stigma			Cognitive affiliate stigma			Behavioural affiliate stigma			Total affiliate stigma
	B	SE B	β	B	SE B	β	B	SE B	β	B	SE B	β
Relationship to individuala	−0.03	0.10	−0.01	−0.35	0.12	−0.14**	−0.04	0.08	−0.02	−0.13	0.08	−0.08
Caregiver ageb	0.03	0.04	0.05	−0.15	0.05	−0.15**	0.01	0.03	0.02	−0.03	0.03	−0.05
Ethnicityc	0.46	0.15	0.15**	−0.25	0.18	−0.07	0.15	0.12	0.06	0.12	0.11	0.05
Diagnosesd	−0.04	0.04	−0.05	−0.01	0.05	−0.01	−0.02	0.04	−0.03	−0.03	0.03	−0.04
No. of physical disabilitiese	−0.07	0.05	−0.07	0.18	0.06	0.14**	−0.04	0.04	−0.05	0.02	0.04	0.03
Challenging behaviourf	0.03	0.01	0.15**	0.04	0.01	0.17**	0.03	0.01	0.21**	0.03	0.01	0.23**
R2			0.05			0.10			0.05			0.07
F			3.61**			7.72**			3.52**			5.01**

a. Relationship to individual: 0 = mothers, 1 = all others.

b. Caregiver age: 1 = <30, 2 = 31–44, 3 = 44–54, 4 = 55–65, 5 = 55–65, 6 = >65.

c. Ethnicity: 0 = White, 1 = other.

d. Additional diagnoses: 1 = ID only, 2 = ID + ASD, 3 = ID + DS/Other, 4 = ID + ≥2.

e. Number of physical disabilities: 0 = none, 1 = < 2, 2 = ≥ 3.

**P < 0.01.