Table 2.
Characteristics of All Individuals at First Evaluation, Stratified by Physical Activity
| Physical Activitya |
P Value |
|||
|---|---|---|---|---|
| No (n = 520) |
Some (n = 650) |
Much (n = 710) |
||
| Male sex | 137 (26) | 188 (29) | 262 (37) | .001 |
| Age, mean (SD), y | 77.9 (6.9)b | 77.6 (6.6)b | 76.3 (6.3)b | <.001 |
| Ethnicity | ||||
| White | 136 (26) | 171 (26) | 224 (32) | .06 |
| Black | 173 (33) | 209 (32) | 223 (31) | |
| Hispanic | 207 (40) | 261 (40) | 247 (35) | |
| Other | 4 (1) | 9 (1) | 16 (2) | |
| ≥1 Apolipoprotein E ε4 allele | 114 (22) | 155 (24) | 174 (25) | .77 |
| Education, mean (SD), y | 9.7 (4.9)b | 9.9 (4.7)b | 10.6 (4.7)b | .001 |
| Energy, mean (SD), kcal/d | 1392.7 (571.1)b | 1389.6 (518.5)b | 1496.5 (503.7)b | <.001 |
| Body mass index, mean (SD)c | 28.3 (6.0)b | 27.5 (5.4)b | 26.7 (5.1)b | <.001 |
| Comorbidity index, mean (SD) | 2.2 (1.5)b | 2.0 (1.4)b | 1.8 (1.4)b | <.001 |
| Smoker | 72 (14) | 71 (11) | 96 (14) | .24 |
| Depression | 58 (11) | 49 (8) | 37 (5) | .001 |
| Leisure activities, mean (SD) | 5.3 (2.1) | 5.4 (2.1) | 5.1 (2.2) | .06 |
| Mediterranean-type diet score | ||||
| Low (range, 0–3) | 190 (37) | 191 (29) | 217 (31) | <.001 |
| Middle (range, 4–5) | 230 (44) | 256 (39) | 293 (41) | |
| High (range, 6–9) | 100 (19) | 203 (31) | 200 (28) | |
Values are expressed as number (percentage) unless otherwise indicated. No physical activity was defined as a median of 0 hours per week. Some physical activity was defined as a median of 0.1 hours per week of vigorous, 0.8 hours per week of moderate, or 1.3 hours per week of light physical activity, or a combination thereof. Much physical activity was defined as a median of 1.3 hours per week of vigorous, 2.4 hours per week of moderate, or 3.8 hours per week of light physical activity, or a combination thereof.
P<.05 for subgroup comparisons indicated with a “b” footnote. These comparisons were calculated by post hoc Bonferroni and Tukey tests. The no and some physical activity groups were compared with the much physical activity group.
Calculated as weight in kilograms divided by height in meters squared.