Table 1.

Sample size in the Danish surveys, the Health and Retirements Study, and the Nihon University Japanese Longitudinal Study of Aging

Age group	Danish surveysa		HRS		NUJLSOA
	Men	Women	Men	Women	Men	Women
45–49	398	394
50–54	515	499	640	1,013
55–59	507	468	1,051	1,472
60–64	479	480	936	1,463
65–69	299	275	1,537	1,879	187	217
70–74	833	923	1,267	1,560	456	477
75–79	610	938	906	1,128	328	340
80–84	291	493	647	917	299	413
85–89	168	326	344	649	179	312
90+	621	1,777	142	379	56	139
Total	4,721	6,573	7,470	10,460	1,505	1,898

^aDanish surveys: the Study of Middle-Aged Danish Twins, the Longitudinal Study of Aging Danish Twins, the Danish-1905-Cohort Study, the HRS—the Health and Retirement Study; the NUJLSOA—the Nihon University Japanese Longitudinal Study of Aging