Table 1:
Comparison of Baseline Characteristics of Einstein Aging Study Participants Based on Development of Incident Dementia
| Variable | All Subjects N=1156 Mean(±SD)a | No Dementia N=1071 Mean(±SD)a | Dementia N=85 Mean(±SD)a | Statistics | P-value |
|---|---|---|---|---|---|
| Age, years | 78.28±5.27 | 78.02 (±5.18) | 81.76 (± 5.30) | t=−6.30 | <.001 |
| Female % (N) | 60.7 (702) | 60.7 (652) | 61.0 (50) | X2=.002d | .96 |
| Race Ethnicity %(N) | Fisher’s Exact=2.305 | .73 | |||
| White | 64.4 (763) | 66.1 (710) | 64.6 (53) | ||
| Black | 26.9 (318) | 27.4 (294) | 29.3 (24) | ||
| Hispanic White | 3.4 (40) | 3.4 (37) | 3.7 (3) | ||
| Hispanic Black | 1.0 (12) | 1 (11) | 1.2 (1) | ||
| Asian | .6 (7) | .6 (6) | .5 (1) | ||
| Other | 1.4 (16) | 1.5 (16) | 0 (0) | ||
| Education years | 14.12± 3.43 | 14.16 (± 3.43) | 13.70 (± 3.45) | t=1.18 | .24 |
| Illness Indexb (0-10) | 1.27±1.06 | 1.28 (±1.08) | 1.09 (± 0.79) | t=1.62 | .11 |
| Blessed Score (0-32) | 2.16±2.14 | 2.01 (± 1.95) | 4.11 (±3.27) | t=.8.84 | <.001 |
| Normal Walking Velocity (cm/s) | 94.12±22.89 | 94.42 (±23.07) | 90.19 (±20.11) | t=1.60 | .11 |
| WWT variables | |||||
| Velocity (cm/s) | 69.01 ±25.62 | 69.31 (±25.57) | 65.38 (±26.17) | t=1.34 | .18 |
| Cadence (step/min) | 80.02±20.97 | 80.05 (±.20.89) | 79.55 (±22.16) | t=.21 | .84 |
| Step Length(cm) | 51.29±11.92 | 51.45 (±11.97) | 49.13 (±11.06) | t=1.71 | .09 |
| Swing % | 34.49±5.41 | 34.43 (±5.45) | 35.16 (±4.70) | t=−1.17 | .24 |
| Stance % | 65.52±5.32 | 65.57 (±5.37) | 64.84 (±4.70) | t=1.21 | .23 |
| Double Support % | 31,33±9.34 | 31.40 (±9.43) | 30.35 (±7.99) | t=.98 | .33 |
| Swing Time SD | .15±.72 | .15 (±.74) | .16 (±.33) | t=−.14 | .89 |
| Step Time SD | .16 (±.8) | .16 (±.78) | .15 (±.30) | t=.11 | .92 |
a
Unless otherwise indicated
b
Illness index includes self-report of depression, diabetes, heart failure, hypertension, angina, myocardial infarction, strokes, Parkinson’s disease, chronic obstructive lung disease, and arthritis
c
df=1