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Table 1 Participant Characteristics of the Simplified-Chinese version PFS Validation Sample by Perceived Physical Fatigability Severity Strata

From: Validation of perceived physical fatigability using the simplified-Chinese version of the Pittsburgh Fatigability Scale

Characteristics Total sample
N = 457
PFS Physical Score Severity Strata
Less Fatigability
0–14
n = 54
15–24
n = 132
Most Fatigability
25
n= 271
Age, years 84.8 ± 5.8 80.2 ± 8.7 84.5 ± 5.8 85.8 ± 4.5
 ≥ 80 years 404 (92.3) 35 (64.8) 116 (87.9) 253 (93.4)
 Median (IQR) 86.0 (83.0–88.0) 83.0 (72.8–87.3) 85.5 (83.0–88.0) 86.0 (83.0–89.0)
Women 275 (60.2) 26 (48.1) 65 (49.2) 184 (67.9)
Married 280 (61.3) 35 (64.8) 93 (70.5) 152 (56.1)
Education years
 < 12 (Below high school) 127 (27.8) 16 (29.6) 25 (18.9) 86 (31.7)
 = 12 (High school) 109 (23.9) 15 (27.8) 28 (21.2) 66 (24.4)
 > 12 (Above high school) 221 (48.4) 23 (42.6) 79 (59.8) 119 (43.9)
Monthly income, RMB/ USD
 < 10,000/ 1549.4 201 (44.0) 23 (42.6) 51 (38.6) 127 (46.9)
 ≥ 10,000/ 1549.4 256 (56.0) 31 (57.4) 81 (61.4) 144 (53.1)
BMI, kg/m2 24.0 ± 3.5 24.3 ± 3.3 24.2 ± 3.1 23.9 ± 3.7
Smoking status
 Current 8 (1.8) 2 (3.7) 3 (2.3) 3 (1.1)
 Previous a 91 (19.9) 10 (18.5) 31 (23.5) 50 (18.5)
 Never 358 (78.3) 42 (77.8) 98 (74.2) 218 (80.4)
MNA score, 0–14 range 12.9 ± 1.6 13.3 ± 1.0 13.2 ± 1.1 12.7 ± 1.8
 ≤ 11 64 (14.2) 4 (7.4) 12 (9.2) 48 (18.1)
Health Conditions
 Hypertension 320 (70.6) 35 (64.8) 88 (67.2) 197 (73.5)
 CAD 227 (50.3) 23 (42.6) 60 (45.8) 144 (54.1)
 COPD 82 (18.2) 3 (5.6) 27 (20.8) 52 (19.5)
 Diabetes 132 (28.9) 10 (18.5) 33 (25.2) 89 (32.8)
 CKD 45 (10.0) 6 (11.1) 12 (9.2) 27 (10.1)
Number of comorbidities
 0–1 54 (12.5) 20 (15.9) 24 (9.4) 10 (19.2)
 2–4 218 (50.3) 62 (49.2) 124 (48.6) 32 (61.5)
 ≥ 5 161 (37.2) 44 (34.9) 107 (42) 10 (19.2)
Total SPPB score, 0–12 range 8.4 ± 2.8 10.3 ± 1.9 9.1 ± 2.3 7.5 ± 2.8
 10–12 141 (39.9) 37 (71.2) 53 (48.6) 51 (26.6)
 7–9 116 (32.9) 13 (25.0) 42 (38.5) 61 (31.8)
  ≤ 6 96 (27.2) 2 (3.8) 14 (12.8) 80 (41.7)
Gait speed, m/s 0.9 ± 0.3 1.1 ± 0.3 1.0 ± 0.2 0.8 ± 0.2
 < 1 m/s 273 (67.9) 18 (34.0) 74 (57.8) 181 (81.9)
Chair stand test time, s 14.2 ± 4.9 12.5 ± 4.8 12.8 ± 3.1 15.8 ± 5.4
 ≥ 16.7 s or incapable b 133 (35.2) 3 (5.9) 30 (28.6) 100 (45.0)
TUG time, s 12.9 ± 4.9 11.4 ± 5.4 12.1 ± 4.0 14.0 ± 5.3
 ≥ 14.0 s 112 (33.0) 10 (19.6) 33 (26.8) 69 (41.8)
ADL ≤ 80 48 (10.5) 1 (1.9) 0 (0.0) 47 (17.4)
IADL ≤ 7 284 (62.1) 18 (33.3) 67 (50.8) 199 (73.4)
  1. Values are presented in mean ± standard deviation, N (%) and median (IQR)
  2. BMI Body Mass Index, MNA Mini Nutritional Assessment, CAD Coronary Artery Disease, COPD Chronic Obstructive Pulmonary Disease, CKD Chronic Kidney Disease, PFS Pittsburgh Fatigability Scale, SPPB Short Physical Performance Battery, TUG Timed Up and Go Test, ADL Activities of Daily Living, IADL Instrumental Activities of Daily Living, IQR Interquartile Range
  3. a Defined as used to smoke and has quit smoking for more than 6 months
  4. b “Incapable” means the participants did not complete the 5 times chair stand test for physical reasons or safety reasons