Analysis of urban–rural differences in cognitive function among empty nest older adult in China based on Blinder-Oaxaca decomposition

The proportion of the risk of cognitive impairment among empty nest older adult in rural areas is higher than that in urban areas, and education level is the most important factor affecting the difference in cognitive function between urban and rural areas. It is suggested to improve health education in rural areas, narrow the urban-rural gap in cognitive function of empty nest older adult, and promote fairness in medical service supply.