Table 1. Participant Characteristics by Accelerometer-measured Moderate/Vigorous Physical Activity.
| Accelerometer-measured minutes per day of MVPA | |||||
|---|---|---|---|---|---|
| Characteristic | Quartile 1(<25.1) | Quartile 2(25.1-<44.1) | Quartile 3(44.1-<69.3) | Quartile 4(≥69.3) | P -value |
| Age category, No. (%) | <0.001 | ||||
| 63 - 74 years | 182 (13.1) | 324 (23.3) | 501 (36.2) | 688 (49.6) | |
| 75 - 79 years | 196 (14.2) | 313 (22.5) | 278 (20.1) | 274 (19.8) | |
| 80 - 84 years | 461 (33.3) | 442 (31.8) | 382 (27.6) | 309 (22.3) | |
| 85 - 89 years | 401 (29.0) | 266 (19.2) | 189 (13.7) | 102 (7.4) | |
| 90+ years | 145 (10.5) | 44 (3.2) | 35 (2.5) | 13 (0.9) | |
| Race/Ethnicity, No. (%) | <0.001 | ||||
| White | 832 (60.1) | 705 (50.8) | 643 (46.4) | 617 (44.5) | |
| Black | 411 (29.7) | 495 (35.6) | 493 (35.6) | 422 (30.5) | |
| Hispanic/Latina | 142 (10.3) | 189 (13.6) | 249 (18.0) | 347 (25.0) | |
| College Graduate, No. (%) | 507 (36.9) | 550 (39.9) | 589 (42.8) | 601 (43.5) | 0.01 |
| Alcohol use in prior 3 months, No. (%) | <0.001 | ||||
| Non-drinker | 574 (46.0) | 510 (39.9) | 431 (33.8) | 393 (29.9) | |
| Less than 1 per week | 422 (33.8) | 448 (35.1) | 444 (34.9) | 427 (32.5) | |
| 1 or more drinks per week | 251 (20.1) | 320 (25.0) | 399 (31.3) | 493 (37.6) | |
| Excellent or very good vision, No. (%) | 598 (48.2) | 646 (50.8) | 662 (52.0) | 759 (58.0) | <0.001 |
| None or very mild body pain, No. (%) | 420 (33.7) | 491 (38.6) | 590 (46.2) | 702 (53.8) | <0.001 |
| Has depressive symptoms, No. (%) | 99 (8.3) | 68 (5.6) | 73 (6.0) | 66 (5.2) | 0.007 |
| Uses sleep aid ≥1 time/week, No. (%) | 233 (18.9) | 230 (18.0) | 201 (15.7) | 206 (15.8) | 0.08 |
| Number of chronic conditions, No. (%) | <0.001 | ||||
| Zero | 171 (13.1) | 199 (15.4) | 297 (22.9) | 378 (28.9) | |
| One | 408 (31.4) | 508 (39.2) | 503 (38.8) | 548 (42.0) | |
| Two | 400 (30.8) | 366 (28.3) | 343 (26.5) | 275 (21.1) | |
| Three or more | 322 (24.8) | 222 (17.1) | 152 (11.7) | 105 (8.0) | |
| Number of falls in past year, No. (%) | <0.001 | ||||
| None | 836 (63.5) | 921 (68.3) | 970 (72.1) | 964 (70.7) | |
| 1 Fall | 281 (21.3) | 283 (21.0) | 255 (19.0) | 269 (19.7) | |
| 2 or more Falls | 200 (15.2) | 144 (10.7) | 121 (9.0) | 131 (9.6) | |
| Injured from fall in past year, No. (%) a | 239 (40.7) | 192 (37.7) | 183 (40.4) | 181 (38.7) | 0.72 |
| Body mass index, mean (SD), kg/m 2 | 28.6 (6.0) | 28.9 (6.0) | 28.0 (5.5) | 26.8 (4.9) | <0.001 |
| Obese (BMI ≥30 kg/m 2), No. (%) | 486 (35.4) | 523 (37.9) | 415 (30.2) | 300 (21.8) | <0.001 |
| SPPB Score categorized, No. (%) | <0.001 | ||||
| 1 - 4 | 230 (19.0) | 98 (7.8) | 51 (4.0) | 38 (3.0) | |
| 5 - 8 | 611 (50.6) | 610 (48.3) | 491 (38.3) | 373 (29.3) | |
| 9 – 12 | 367 (30.4) | 556 (44.0) | 741 (57.8) | 864 (67.8) | |
a
Among those reporting a fall in the past year. Abbreviations: BMI, body mass index; MVPA, moderate/vigorous physical activity; SD, standard deviation; SPPB, Short Physical Performance Battery. MVPA cutpoint is vector magnitude counts ≥519 per 15-seconds. Percents may not sum to 100 because all variables, except age and race/ethnicity, have some missing data. A higher SPPB score indicates better physical function, scores = 0 were excluded.