Table 1

Demographic characteristics

Age (mean±SD), years66.8±8.4
 Range, years55–97
Gender, frequency of females (%)9761 (52.4)
Education, number and frequency (%)
 Basic7029 (37.7)
 High school6086 (32.7)
 College/university3332 (17.8)
 Missing2186 (11.7)