Influence of Parent-grandparent Coparenting Conflict on Grandparents' Depression Mediated by Grandparents' Sense of Mastery and Moderated by Their Sense of Valued Elder

Background In China, 80% of the grandparents are taking part in caring for grandchildren. However, it has been found by available studies that involvement in taking care of grandchildren may increase the risk of depression among grandparents, which would seriously harm their quality of life, and the risk of depression is associated with parent-grandparent coparenting conflict, grandparents' sense of valued elder and sense of mastery, but the underlying mechanism still requires further investigation. Objective To investigate the influence of parent-grandparent coparenting conflict on grandparents' depression, and to explore the mediating and moderating mechanisms that grandparents' sense of mastery and sense of valued elder may play in it. Methods This study used two surveys. Grandparents (totally 626 cases) who participated in caring for grandchildren were selected by snowball sampling to attend an online survey or by convenience sampling to attend an offline survey from August to November 2021 using four que