Dementia Cases Surge More Rapidly in China Compared to Global Trends

The incidence of dementia is escalating in China at an unprecedented rate, with numbers exceeding four times the historical figures observed over past decades.

Daoying Geng from The University of Hudun conducted an analysis of dementia statistics across 204 countries and regions between 1990 and 2021. The focus was on dementia cases in individuals over 40, particularly other forms like Alzheimer’s and cerebrovascular dementia.

During this timeframe, researchers discovered that global dementia cases surged from nearly 22 million in 1990 to approximately 57 million by 2021. The situation was particularly alarming in China, which saw its case count increase over fourfold to reach about 4 million.

In-depth analysis indicates that population growth plays a pivotal role. China experienced a baby boom in the 1950s, which means those individuals are now in their 70s, the age group presenting the highest risk for dementia. Xi Chen from Yale University, who did not participate in the study, noted the uniqueness of China’s baby boom generation compared to other countries’ cohorts.

The research team identified three additional significant contributors to the escalating dementia rates in China. First, smoking predominantly impacts men, with only 2% of Chinese women being smokers about half of the male population smokes. This contrasts sharply with countries like the US and UK, where smoking rates are on a downward trend, according to Chen.

A Western trend mirrored in China involves rising rates of diabetes and obesity, particularly over recent decades, both recognized risk factors for dementia. This shift may be attributed to the adoption of a Western-style diet, which is generally higher in fat and calories, Chen explains. He posits that as younger generations in China smoke less, dementia rates may eventually mirror those of the US or UK, albeit the present conditions continue to exert a substantial influence on China.

“Dementia is among the costliest diseases globally, necessitating extensive care and treatment,” Chen emphasizes. “As for aging, China possesses the largest elderly population worldwide. There are few young individuals to care for this significant number of seniors living with dementia, presenting numerous challenges.”