Table 1.

Selected characteristics of Cache County elders without dementia at Wave I and living at Wave II

CharacteristicsWave II
RespondersNon-respondersNon-completers
* p < 0.01 in comparison with Wave II responders, calculated by two-sample t-tests of means for age and education, and by Pearson χ2 for sex and APOE (excluding missing values).
† Twenty-seven non-completers who died prior to conclusion of the Wave II assessments are not included in this table.
Sex
    Male, n = 1,707 (41.7%)1,380 (80.8%)297 (17.4%)30 (1.8%)*
    Female, n = 2,385 (58.3%)1,910 (80.1%)411 (17.2%)64 (2.7%)
    Total, n = 4,092 (100%)3,290 (80.4%)708 (17.3%)94 (2.3%)
Mean age at Wave I, y (SD)74.00 (6.41)76.11 (6.77)*80.11 (6.95)*
Mean education, y (SD)13.38 (2.86)12.75 (2.71)*12.26 (2.93)*
No. of APOE ε4 alleles (% of column total)
    02,260 (68.7%)456 (64.4%)62 (66.0%)
    1926 (28.1%)190 (26.8%)25 (26.6%)
    279 (2.4%)10 (1.4%)3 (3.2%)
    Missing25 (0.8%)52 (7.3%)4 (4.3%)