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Table 5 Baseline characteristics of 6,126 OPACH participants by quartiles of accelerometer measured physical activity

From: The Objective Physical Activity and Cardiovascular Disease Health in Older Women (OPACH) Study

   Quartiles of average VM per 15-s epoch (adherent days only)  
Total <70.7 70.7–<95.2 95.2–<126.0 ≥126.0 p-value
Age group, years, n (%)
 63–69 627 (10.2) 67 (10.7) 98 (15.6) 169 (27.0) 293 (46.7) <0.001
 70–79 2448 (40.0) 417 (17.0) 600 (24.5) 664 (27.1) 767 (31.3)
 80–89 2794 (45.6) 908 (32.5) 767 (27.5) 663 (23.7) 456 (16.3)
 90+ 257 (4.2) 139 (54.1) 67 (26.1) 36 (14.0) 15 (5.8)
Race/Ethnicity, n (%)
 Non-Hispanic White 3046 (49.7) 911 (29.9) 779 (25.6) 726 (23.8) 630 (20.7) <0.001
 Non-Hispanic Black 2047 (33.4) 489 (23.9) 541 (26.4) 519 (25.4) 498 (24.3)
 Hispanic/Latina 1033 (16.9) 131 (12.7) 212 (20.5) 287 (27.8) 403 (39.0)
Education, n (%)
 High School or less 1237 (20.3) 311 (25.1) 315 (25.5) 307 (24.8) 304 (24.6) 0.05
 Some College 2349 (38.6) 620 (26.4) 610 (26.0) 555 (23.6) 564 (24.0)
 College Graduate or more 2499 (41.1) 590 (23.6) 593 (23.7) 655 (26.2) 661 (26.5)
 Current Smoker, n (%) 159 (2.9) 58 (36.5) 38 (23.9) 38 (23.9) 25 (15.7) 0.001
Alcohol Use, n (%)
 Non-drinker 2089 (37.4) 589 (28.2) 571 (27.3) 500 (23.9) 429 (20.5) <0.001
  < 1 drink per week 1912 (34.2) 477 (25.0) 479 (25.1) 490 (25.6) 466 (24.4)
  ≥ 1 drink per week 1589 (28.4) 290 (18.3) 342 (21.5) 429 (27.0) 528 (33.2)
 Excellent or Very Good Self-Rated Health, n (%) 2852 (51.3) 469 (16.4) 665 (23.3) 781 (27.4) 937 (32.9) <0.001
 RAND SF-36 Physical Function Score, mean (SD) 68.2 (25.8) 50.4 (26.5) 66.0 (24.7) 73.4 (22.0) 82.0 (18.6) <0.001
 Depressive Symptoms Score, mean (SD) 0.03 (0.11) 0.03 (0.12) 0.03 (0.10) 0.02 (0.10) 0.02 (0.10) 0.31
 Self-Reported Physical Activity, MET-hrs/week, mean (SD) 12.0 (14.1) 6.3 (9.1) 9.9 (11.1) 13.3 (13.9) 18.4 (17.6) <0.001
CHAMPS Expenditure, MET-hrs/week, mean (SD) 29.4 (26.9) 18.8 (18.1) 25.0 (20.7) 32.4 (27.4) 41.0 (33.3) <0.001
CARDIA Scale, sedentary hours/week, mean (SD) 56.3 (22.6) 63.2 (23.0) 58.4 (22.6) 54.6 (21.8) 49.6 (20.7) <0.001
Falls in past 12 months, n (%)
 None 4256 (69.5) 1010 (23.7) 1065 (25.0) 1068 (25.1) 1113 (26.2) <0.001
 One time 1195 (19.5) 298 (24.9) 307 (25.7) 307 (25.7) 283 (23.7)
 Two or more times 675 (11.0) 223 (33.0) 160 (23.7) 157 (23.3) 135 (20.0)
 Falls Efficacy Score, mean (SD) 10.7 (4.1) 12.6 (4.9) 10.6 (3.8) 10.2 (3.7) 9.4 (3.3) <0.001
 Short Physical Performance Battery score, mean (SD) 8.2 (2.5) 6.8 (2.7) 8.1 (2.4) 8.7 (2.2) 9.3 (2.1) <0.001
 Systolic Blood Pressure, mean (SD) 125.7 (14.3) 128.1 (15.2) 126.4 (14.5) 125.2 (14.0) 123.2 (13.2) <0.001
 Diastolic Blood Pressure, mean (SD) 72.5 (8.8) 73.1 (9.5) 72.6 (8.9) 72.3 (8.6) 72.1 (8.0) 0.03
 Waist, inches, mean (SD) 35.4 (5.5) 37.4 (5.9) 36.0 (5.2) 34.9 (5.2) 33.3 (4.6) <0.001
 Weight, lbs, mean (SD) 157.9 (34.1) 166.9 (38.2) 160.3 (34.8) 155.9 (31.6) 148.8 (28.5) <0.001
 Body Mass Index, kg/m2, mean (SD) 28.1 (5.7) 29.7 (6.3) 28.7 (5.7) 27.7 (5.5) 26.4 (4.8) <0.001
Body Mass Index Categories, n (%)
  < 25 kg/m2 1868 (32.5) 328 (17.6) 400 (21.4) 495 (26.5) 645 (34.5) <0.001
 25–<30 kg/m2 2076 (36.2) 474 (22.8) 524 (25.2) 562 (27.1) 516 (24.9)
  ≥ 30 kg/m2 1796 (31.3) 597 (33.2) 516 (28.7) 395 (22.0) 288 (16.0)
Medical History
 Stroke 427 (7.0) 164 (38.4) 123 (28.8) 79 (18.5) 61 (14.3) <0.001
 Congestive Heart Failure 124 (2.0) 67 (54.0) 26 (21.0) 22 (17.7) 9 (7.3) <0.001
 Total CVD 1234 (20.1) 441 (35.7) 329 (26.7) 273 (22.1) 191 (15.5) <0.001
 Hip fracture 177 (2.9) 72 (40.7) 49 (27.7) 39 (22.0) 17 (9.6) <0.001
 Any clinical fracture 2060 (33.6) 580 (28.2) 508 (24.7) 508 (24.7) 464 (22.5) <0.001
 Diabetes 1928 (31.5) 603 (31.3) 529 (27.4) 442 (22.9) 354 (18.4) <0.001
 Osteoarthritis 3748 (61.2) 974 (26.0) 960 (25.6) 930 (24.8) 884 (23.6) 0.005
 Invasive cancer 942 (15.4) 292 (31.0) 252 (26.8) 220 (23.4) 178 (18.9) <0.001
 Breast cancer 457 (7.5) 138 (30.2) 124 (27.1) 99 (21.7) 96 (21.0) 0.009
  1. Abbreviations: CARDIA Coronary Artery Risk Development in Young Adults, CHAMPS Community Health Activities Model Program for Seniors, CVD Cardiovascular disease, MET Metabolic equivalents, OPACH Objective Physical Activity and Cardiovascular Health, SD Standard deviation