Table 2.

Incidence of dementia events across categories of period-specific BMI, by sex, pooled CHS and Health ABC.

	Women					Men
	Number of Events	Person-years	IR*	95% CI		Number of Events	Person-years	IR*	95% CI
Overall	493	25581				416	20097
Early Adulthood BMI TWA (ages 20–49)
<25	329	18377	15.9	14.1, 17.8		276	14298	19.0	16.6, 21.4
25–30	115	5469	29.7	22.0, 37.2		114	5190	22.8	18.0, 27.7
>30	49	1735	46.0	27.7, 64.3		26	609	44.6	26.0, 63.2
Midlife BMI TWA (ages 50–69)
<25	215	9947	24.6	19.3, 29.9		129	6551	16.8	13.2, 20.4
25–30	157	9611	17.8	14.7, 20.9		204	10070	22.0	18.8, 25.3
>30	121	6023	15.1	10.6, 19.5		83	3476	26.2	17.4, 34.9
Late life BMI TWA (ages 70–89)
<25	239	10895	22.0	18.8, 25.3		167	7006	29.4	24.0, 34.7
25–30	163	9144	19.5	16.3, 22.6		191	9813	19.4	16.5, 22.2
>30	91	5542	14.3	10.7, 17.9		58	3278	12.8	8.9, 16.6

^*IR: numbers of events per 1000 person-years at risk