Long-term effects of the left-behind experience on health and its mechanisms: Empirical evidence from China

Previous studies have primarily focused on the contemporaneous, short-term and medium-term effects of the childhood left-behind experience on subsequent health, but ignored its long-term effects and the mediating mechanisms of health outcomes. Using nationally representative data from the 2018 China Labor-force Dynamic Survey, this study uses self-rated health as a measure of health outcomes to examine the long-term effects of the left-behind experience and elucidate the underlying mechanisms that contribute to health inequality from a life-course perspective. The results show: (1) the childhood left-behind experience exerts a long-term negative impact on self-rated health in adulthood, and this impact persists and does not fade over time after ending the left-behind status; (2) the influence of the childhood left-behind experience on self-rated health demonstrates a cumulative disadvantage effect, with longer duration of being left-behind resulting in greater negative impacts; additionally, there's a critical window effect, with earlier left-behind experience leading to more significant negative outcomes; (3) the experience of being left behind during childhood has a negative impact and threshold effect on social trust in adulthood, meaning that the left-behind experience negatively affects social trust, but the duration of being left behind doesn't exacerbate this reduction; and (4) social trust is a key mediating factor between left-behind experiences and health, explaining 8.70% of this effect, and explaining 12.15% and 7.71% of mediation effects for adults with left-behind experience in middle and primary school stages, respectively.