Table 2. Tri-axial accelerometer-determined PA and SED by sex, age, and BMI.
All (n=1,739) Men (n=660) Women (n=1,079) P-value
Step (steps/day) 4,473 (2,861-6,523) 4,615 (2,987-6,900) 4,402 (2,797-6,356) 0.3529
Age groups <.0001 a
65-69 5,670 (3,976-7,806) 5,767 (4,179-8,021) 5,583 (3,815-7,527)
70-74 4,795 (3,301-6,600) 4,550 (3,229-6,538) 4,925 (3,374-6,713)
75-79 3,986 (2,468-5,609) 4,174 (2,655-6,101) 3,778 (2,407-5,565)
≥80 2,561 (1,396-4,089) 2,986 (1,694-4,716) 2,436 (1,351-3,729)
BMI groups 0.0011 b
BMI <25 4542 (2,922-6,672) 4,757 (3,014-7,084) 4,409 (2,818-6,426)
BMI ≥25 4292 (2,730-6,042) 4,229 (2,779-6,191) 4,295 (2,720-6,042)
SED (minutes/day) 451.6 (122.4) 485.4 (129.6) 431.0 (113.0) <.0001 c
Age groups <.0001 a
65-69 430.8 (122.0) 458.5 (132.6) 413.6 (111.6)
70-74 451.6 (124.1) 492.6 (137.0) 424.8 (106.9)
75-79 456.1 (114.5) 493.8 (111.6) 433.5 (110.4)
≥80 485.3 (122.4) 516.7 (122.4) 468.2 (119.2)
BMI groups 0.0009 b
BMI <25 446.6 (122.5) 482.2 (128.9) 424.3 (112.8)
BMI ≥25 466.8 (120.9) 495.7 (131.5) 450.4 (111.5)
LPA (minutes/day) 332.5 (98.1) 278.8 (89.3) 365.3 (88.3) <.0001 c
Age groups <.0001 a
65-69 350.8 (96.3) 297.2 (88.9) 384.2 (85.1)
70-74 334.8 (99.4) 272.6 (90.6) 375.4 (82.6)
75-79 326.5 (90.5) 278.2 (77.3) 355.4 (85.6)
≥80 301.5 (100.1) 253.2 (95.4) 327.8 (92.6)
BMI groups <.0001 b
BMI <25 338.2 (98.0) 284.0 (87.9) 372.1 (88.3)
BMI ≥25 315.1 (96.5) 262.0 (92.1) 345.3 (85.5)
MVPA (minutes/day) 37.8 (19.0-60.7) 33.7 (16.8-57.9) 40.0(20.2-63.3) <.0001 c
Age groups <.0001 a
65-69 54.2 (33.6-78.1) 53.3 (31.0-69.8) 54.9 (35.6-83.8)
70-74 39.7 (23.3-58.8) 34.7 (21.3-53.2) 40.8 (26.8-66.0)
75-79 31.0 (14.6-50.6) 25.9 (13.0-44.0) 33.3 (15.9-55.1)
≥80 16.8 (7.6-34.5) 14.2 (7.1-32.1) 18.5 (7.7-34.8)
BMI groups 0.0408 b
BMI <25 38.9 (19.4-62.8) 34.6 (17.1-59.3) 41.3 (20.5-66.1)
BMI ≥25 35.8 (17.5-56.4) 32.1 (15.7-49.9) 37.1 (19.4-59.3)
Note: Data are represented as median (interquartile range) or Mean (SD).
a Significant difference among age groups.
b Significant difference between BMI groups.
c Significant difference between sexes.
† Significant age×BMI interaction effect. PA, physical activity; SED, sedentary behavior; BMI, body mass index; LPA, light physical activity; MVPA, moderate-to-vigorous physical activity.