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Table 1 Demographic characteristics of participants by frailty level

From: Frailty, nutrition-related parameters, and mortality across the adult age spectrum

Characteristics Frailty index score
≤ 0.1 N = 5119 > 0.1 to 0.2 N = 2009 > 0.2 to 0.3 N = 1014 > 0.3 N = 888
Age (year), mean ± SD 39.7 ± 13.2 54.8 ± 15.8 62.8 ± 14.5 65.3 ± 14.4
Sex, female, N (%) 2540 (48.3) 1114 (58.7) 529 (56.2) 504 (60.9)
Race, N (%)
 Non-Hispanic White 2478 (70.4) 1112 (75.6) 611 (79.9) 493 (73.1)
 Non-Hispanic Black 1057 (10.6) 409 (10.8) 196 (10.7) 212 (15.1)
 Hispanic 1356 (13.5) 416 (8.8) 179 (5.5) 144 (5.8)
 Other 228 (5.5) 72 (4.7) 28 (4.0) 39 (5.9)
Education, N (%)
 Less than high school 1193 (14.3) 614 (19.5) 384 (27.6) 386 (33.1)
 High school 1195 (24.4) 513 (27.4) 277 (30.3) 211 (29.3)
 Some college/associated education 1560 (32.7) 528 (31.1) 226 (26.4) 204 (27.6)
 College graduate or more 1167 (28.6) 352 (22.0) 127 (15.7) 80 (10.0)
Annual household Income (USD), N (%)
 0–19,999 802 (11.1) 478 (18.2) 335 (27.3) 385 (39.2)
 20,000–44,999 1533 (27.0) 686 (33.0) 354 (38.3) 266 (34.6)
 45,000–74,999 1149 (26.2) 391 (25.6) 143 (21.2) 120 (18.4)
 ≥ 75,000 1336 (35.7) 335 (23.3) 107 (13.2) 55 (7.8)
Marital status, N (%)
 Married 3376 (67.8) 1245 (65.4) 569 (59.9) 402 (50.0)
 Widowed 129 (1.9) 280 (10.7) 225 (16.8) 260 (24.2)
 Divorced or separated 500 (10.2) 294 (14.8) 154 (16.7) 164 (18.7)
 Never married 1110 (20.2) 190 (9.1) 65 (6.6) 61 (7.2)
Full-time working, N (%) 3819 (80.7) 882 (53.4) 214 (28.1) 72 (11.7)
Smoking status, N (%)
 Never 2864 (53.5) 988 (47.4) 411 (40.1) 377 (41.2)
 Former 1021 (20.5) 600 (29.7) 414 (38.1) 346 (37.7)
 Current 1234 (26.0) 421 (22.9) 189 (21.8) 165 (21.1)
  1. The percentages and mean values are weighted
  2. USD United States Dollar