Clinical characterization of study samples

Variable* Incident dementia (n = 256) Referents (n = 6, 272) P value+
Age, years 83 ± 8 62 ± 14 < 0.001
Women, n (%) 155 (60.5) 3, 410 (54.4) 0.05
Average number of segments in one recording 209 ± 85 142 ± 54 < 0.001
Average length of each segment, seconds 11.4 ± 4.7 13.0 ± 4.0 < 0.001

One participant could have multiple voice recordings.

Values are n (%), or mean ± SD. One participant could have multiple recordings;

P value was calculated by the Fisher’ exact test for categorical variables, or Mann-Whitney U test for continuous variables