Musil and colleagues (2006) are conducting a longitudinal study on GM and families.
Over 450 grandmothers have continued in the study, since the study began in 2001., http://fpb.case.edu/grandmother/
…see their structural equation model Musil, Structural equation model
…read the full article, Musil, GM caregiving and health 2006
Conclusions: “Less self-control, self-regulatory efficacy, subjective and instrumental support, and role reward–but more intrafamily strain and stressful family life events–contributed to perceptions of worse family functioning.
Custodial caregiving led to less instrumental support and more intrafamily strain and self-regulatory efficacy.
Multigenerational caregiving was related to more instrumental support and interfamily strain (p. S95)”.