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Table 1 Baseline Characteristics in Training and Validation Cohorts

From: A web-based dynamic Nomogram for predicting instrumental activities of daily living disability in older adults: a nationally representative survey in China

Variables Cohorts, No. (%)
Training (4791) Validation (371)
Age (Years)
 60 ~ 2022 (42.2%) 143 (38.5%)
 65 ~ 1209 (25.2%) 103 (27.8%)
 70 ~ 849 (17.7%) 69 (18.6%)
 75 ~ 711 (14.8%) 56 (15.1%)
Gender
 Male 2508 (52.3%) 192 (51.8%)
 Female 2283 (47.7%) 179 (48.2%)
Education
 Illiterate 2501 (52.2%) 209 (56.3%)
 Primary school 1313 (27.4%) 79 (21.3%)
 Middle school 617 (12.9%) 51 (13.7%)
 High school 257 (5.4%) 27 (7.3%)
 College and above 103 (2.2%) 5 (1.4%)
Marital status
 Married/Cohabitated 3873 (80.8%) 293 (79.0%)
 Other 918 (19.2%) 78 (21.0%)
Social activity
 Never 2467 (51.5%) 146 (39.4%)
 Not regularly 526 (11.0%) 46 (12.4%)
 Almost Weekly 506 (10.6%) 39 (10.5%)
 Almost daily 1292 (27.0%) 140 (37.7%)
Smoking
 Never 2947 (61.5%) 217 (58.5%)
 Quit 596 (12.4%) 46 (12.4%)
 Less than 20 /day 556 (11.6%) 58 (15.6%)
 More than 20 /day 692 (14.4%) 50 (13.5%)
Drinking
 Never 2749 (57.4%) 202 (54.4%)
 Quit 487 (10.2%) 37 (10.0%)
 Less than once/month 334 (7.0%) 35 (9.4%)
 More than once/month 1221 (25.5%) 97 (26.1%)
duration of night sleep (hours)
 7–8 1859 (38.8%) 137 (36.9%)
  < 7 2541 (53.0%) 197 (53.0%)
  > 8 391 (8.1%) 37 (9.9%)
BMI
 Normal 2675 (55.8%) 179 (48.2%)
 Underweight 499 (10.4%) 30 (8.1%)
 Overweight 1617 (33.8%) 162 (43.7%)
Comorbidity
 0 1355 (28.3%) 99 (26.7%)
 1 1475 (30.8%) 100 (27.0%)
  ≥ 2 1961 (40.9%) 172 (46.4%)
Self-report health conditions
 Very good 127 (2.65%) 38 (10.2%)
 Good 551 (11.5%) 62 (16.7%)
 Fair 1572 (32.8%) 179 (48.2%)
 Poor 1813 (37.8%) 82 (22.1%)
 Very poor 728 (15.2%) 10 (2.70%)
Depression
 Normal 3086 (64.4%) 252 (67.9%)
 Depression 1705 (35.6%) 119 (32.1%)
  Median(Q1-Q3) Median(Q1-Q3)
Cognitive function 10.0 [6.50;13.50] 11.0 [7.00;13.50]
Gait speed (m/s) 0.64 [0.50;0.79] 0.68 [0.57;0.82]