The Importance of Birth Year for the Incidence of Dementia

Abstract

This editorial comments on the article by https://doi.org/10.1111/jgs.16027.

Sex differences in dementia risk and risk factors: Individual‐participant data analysis using 21 cohorts across six continents from the COSMIC consortium

“…Women and men may experience parenthood 46 and financial hardship 5,7 differently, possibly mediated by the aforementioned differences in educational and occupational factors 5,7 . These different experiences may be more extreme in those born in the early 20th century, given the adverse global events which took place during that time 42,44 . Nevertheless, population brain health may be shifting around the world, 47 akin to progress in achieving sex and gender equity, 48 and increased effort in equitable cardiovascular disease prevention 21,47 and improved social welfare on a wider population level.…”

Association of Demographic and Early-Life Socioeconomic Factors by Birth Cohort With Dementia Incidence Among US Adults Born Between 1893 and 1949

“… 2 , 4 , 31 Political and economic changes during the first half of the 20th century may have had different implications for dementia risk based on the participant’s age during those experiences. 32 Analysis by birth cohort captures this intersection of age and calendar time. Our results suggest that societal-level changes in the first half of the 20th century that were not captured by the individual early-life measures or the educational levels used in this study may have been associated with decreases in dementia incidence.…”

“…This timing is consistent with participants in the 1929 to 1939 birth cohorts who are entering the eighth decade of life, when dementia risk increases . Political and economic changes during the first half of the 20th century may have had different implications for dementia risk based on the participant’s age during those experiences . Analysis by birth cohort captures this intersection of age and calendar time.…”

Formation and densification of mullite through solid-oxide reaction technique using commercial-grade raw materials

“…Mullite (3Al 2 O 3 •2SiO 2 ) is the only thermodynamically stable compound formed in the alumina-silica binary system, one of the most easily formed, commonly encountered and important mineral useful for various industrial ceramics products [1,2]. Mullite is important because of its excellent characteristics, such as high melting point, low thermal expansion, high thermal shock resistance, excellent corrosion resistance (especially against acidic environments), high hot strength, good micro-hardness and creep resistance up to 1300 • C. Due to its high temperature but low pressure formation conditions, mullite occurs very rarely in nature (the only known natural source is the Island of Mull, Scotland).…”