Interaction effect of midday napping duration and depressive symptoms on subjective memory impairment among older people in China: evidence from the China health and retirement longitudinal study database

• Li TangJinan University
• Yaqi WangJinan University
• Na-ni ZhanJinan University
• Can-Yang LiJinan University
• Zhuang ZhuangJinan University
• Qi-yuan LyuJinan University
• Peng XiongJinan University