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Table 1 Participant characteristics

From: Dose-response association between physical activity and sedentary time categories on ageing biomarkers

Characteristics Sample ‘Physically active
& low sedentary’
‘Physically active
& high sedentary’
‘Physically inactive
& low sedentary’
‘Physically inactive
& high sedentary’
N = 771 n = 38; 4.9% n = 89; 11.5% n = 154; 20.0% n = 490; 63.6%
Age (years) a 76.8 (4.9) 74.4 (4.0) 74.8 (3.7) 75.9 (4.5) 77.7 (5.1)
Sex b
 Male 355 (46.0) 23 (60.5) 62 (69.7) 50 (32.5) 220 (44.9)
 Female 416 (54.0) 15 (39.5) 27 (30.3) 104 (67.5) 270 (55.1)
Education b
 None 487 (63.2) 19 (50.0) 46 (51.7) 97 (63.0) 325 (66.3)
 Primary school 169 (21.9) 11 (28.9) 26 (29.2) 39 (25.3) 93 (19.0)
 Secundary or more 109 (14.1) 8 (21.1) 17 (19.1) 16 (10.4) 68 (13.9)
 Missing c 6 (0.8) 0 (0.0) 0 (0.0) 2 (1.3) 4 (0.8)
Income b
 Low 369 (47.8) 23 (60.5) 45 (50.6) 66 (42.8) 235 (48.0)
 Medium 299 (38.8) 11 (29.0) 33 (37.1) 75 (48.7) 180 (36.7)
 High 56 (7.3) 3 (7.9) 6 (6.7) 7 (4.6) 40 (8.1)
 Missing c 47 (6.1) 1 (2.6) 5 (5.6) 6 (3.9) 35 (7.1)
Marital status b
 Single 42 (5.4) 2 (5.3) 1 (1.1) 9 (5.8) 30 (6.1)
 Married 541 (70.2) 28 (73.7) 73 (82.0) 112 (72.7) 328 (66.9)
 Widowed 171 (22.2) 7 (18.4) 13 (14.6) 30 (19.5) 121 (24.7)
 Divorced/Separated 12 (1.6) 1 (2.6) 2 (2.2) 0 (0.0) 9 (1.8)
 Missing c 5 (0.6) 0 (0.0) 0 (0.0) 3 (1.9) 2 (2.4)
Body mass index (kg/m2) a 30.3 (4.8) 26.9 (3.8) 28.8 (3.6) 30.2 (4.4) 30.8 (5.0)
 Short physical performance battery (points) a 8.4 (3.2) 10.7 (1.6) 10.2 (2.1) 8.4 (2.9) 7.9 (3.4)
 Missing c 6 (0.8) 0 (0.0) 0 (0.0) 1 (0.6) 5 (1.0)
 Frailty trait scale (points) a 38 (14.5) 23.6 (11.7) 28.9 (11.8) 37.7 (13.9) 40.9 (13.9)
 Missing c 22 (2.9) 0 (0.0) 0 (0.0) 4 (2.6) 18 (3.7)
 Accelerometer wear time (min/valid day) a 786.0 (82.6) 810.0 (84.3) 828.9 (80.1) 799.9 (81.5) 772.0 (79.6)
 Sedentary time (min/valid day) a 539.9 (90.6) 433.2 (46.7) 557.9 (67.4) 447.0 (65.1) 574.0 (76.1)
 Light physical activity (min/valid day) a 226.8 (86.2) 311.6 (50.1) 211.9 (44.0) 337.1 (58.4) 188.2 (64.5)
 Moderate-to-vigorous physical activity (min/valid day) a 19.4 (23.8) 65.2 (22.0) 59.1 (23.8) 15.8 (13.8) 9.8 (12.1)
  ≥ 10-min bouts of moderate-to-vigorous physical activity (min/day) b 9.6 (17.7) 42.6 (18.2) 42.6 (22.3) 4.3 (6.1) 2.7 (5.1)
Meet WHO guidelines b
 Yes 127 (16.5) 38 (100.0) 89 (100.0) 0 (0.0) 0 (0.0)
 No 644 (83.5) 0 (0.0) 0 (0.0) 154 (100.0) 490 (100.0)
Light physical activity-to-sedentary time ratio a 0.45 (0.24) 0.72 (0.11) 0.39 (0.09) 0.78 (0.26) 0.34 (0.13)
  1. aContinuous variable; Mean (Standard Deviation)
  2. bCategorical variable; n (Proportion (%))
  3. cMissing data; n (%)