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. Author manuscript; available in PMC: 2021 Mar 1.
Published in final edited form as: Psychol Aging. 2019 Oct 14;35(2):177–189. doi: 10.1037/pag0000413

Table 1.

Sample Characteristics by Family Type

DD SMI Comparison Group Differencea
M (SD), % M (SD), % M (SD), %
(n = 134) (n = 308) (n = 5,642)
Parent-level covariates
 Age 71.1 (4.6) 70.5 (3.9) 70.8 (3.9) 13 (2)
 Gender (1 = mother) 49% 63% 53% 12.2 (2)** (b > c)
 Education 13.9 (2.7) 14.2 (2.5) 13.7 (2.4) 6.4 (2)** (b > c)
 Marital status (1 = currently married) 76% 67% 77% 18.96 (2)*** (b < c)
 Number of children alive 3.8 (1.9) 3.6 (1.4) 3.3 (1.4) 14.6 (2)*** (a, b > c)
 Ever diagnosed as MI (1 = yes) 5% 11% 3% 68.0 (2)*** (b > c)
 Has ADLs limitations (1 = yes) 15% 15% 9% 14.7 (2)** (a, b > c)
Parental well-being
 Depressive symptoms 8.3 (6.9) 9.5 (8.8) 7.9 (7.3) 6.43 (2)** (b > c)
 Psychological wellbeing 89.6 (13.4) 89.5 (13.4) 91.1 (12.4) 3.11 (2)* (b < c)
 SF-12 mental health 55.4 (7.6) 54.1 (8.2) 56.1 (6.6) 11.94 (2)*** (b < c)
 Self-rated health 3.5 (1.0) 3.5 (1.0) 3.7 (0.9) 6.68 (2)** (b < c)
 Number of physical symptoms 5.5 (3.4) 5.8 (3.5) 5.0 (3.5) 10.1 (2)*** (b > c)
 SF-12 physical health 44.3 (11.3) 44.8 (11.5) 46.7 (10.5) 6.93 (2)** (a, b < c)
(n = 335) (n = 726) (n = 17,399)
Child-level covariates
 Age 43.5 (7.6) 43.8 (6.3) 43.8 (6.4) 0.4 (2)
 Gender (1 = daughter) 50% 52% 49% 15 (2)
 Relationship to parent (1 = biological) 91% 93% 97% 49.8 (2)*** (a, b < c)
 Marital status (1 = married) 68% 67% 72% 7.5 (2)* (b < c)
 Parental status (1 = yes) 80% 75% 77% 3.2 (2)
 Work status (1 = currently working) 90% 85% 90% 20.9 (2)*** (b < c)
 Education (1 = ever attended college) 57% 66% 67% 12.7 (2)** (a < c)
 Geographical proximity 4.7 (2.1) 4.7 (2.1) 4.6 (2.0) 3.1 (2)*
Parent-child ambivalence
 Ambivalence 1.7 (1.0) 1.7 (1.1) 1.6 (1.0) 8.85 (2)*** (b > c)

DD = Developmental Disabilities; SMI = Serious Mental Illness; MI = Mental Illness; ADL = Activities of Daily Living

Note.

a

Differences of families of an adult child with DD or SMI from comparison group families are noted when the overall three-group differences were significant at p < .05; (a) represents DD, (b) represents SMI, and (c) represents comparison group.

*

p<.05,

**

p<.01,

***

p<.001