The relationship between age and sum recall mediated by right hippocampal volume and SMC score and moderated by hypertension status. Coefficients of a moderated serial mediation model with sex, education, hypertension duration, white matter hyperintensities, and systolic blood pressure as covariates. Lower SMC scores indicate greater memory complaints. *p < .05, **p <. 01, ***p <. 001, SMC = subjective memory complaint, SRT = selective reminding task.