Skip to main content

Table 1 Characteristics of the full, derivation, and validation samples

From: Development and validation of the fracture risk scale home care (FRS-HC) that predicts one-year incident fracture: an electronic record-linked longitudinal cohort study

Characteristic: Full sample
N = 317,621
Derivation sample
N = 238,011
Validation sample
N = 79,610
N (%) N (%) N (%)
New fractures within one year from initial assessment 11,526 (3.6) 8679 (3.7) 2847 (3.6)
 Hip 5057 (1.6) 3822 (1.6) 1235 (1.6)
 Other fracture (spine, pelvis, humerus, wrist) 6959 (2.2) 5228 (2.2) 1731 (2.2)
Age group
 18 to 50 14,354 (4.5) 10,693 (4.5) 3661 (4.6)
 50 to 64 37,652 (11.9) 28,297 (11.9) 9355 (11.8)
 64 to 80 96,429 (30.4) 72,222 (30.4) 23,207 (30.4)
 80+ 169,137 (53.3) 126,763 (52.3) 42,374 (53.2)
Female 191,510 (60.3) 14,365 (60.3) 48,045 (60.4)
Unsteady gait 216,283 (68.1) 162,021 (68.1) 54,262 (68.2)
Wandering 10,165 (3.2) 7695 (3.2) 2470 (3.1)
Tobacco use 27,793 (8.8) 20,772 (8.7) 7021 (8.8)
Fall in last 180 days 143,666 (45.2) 107,588 (45.2) 36,074 (45.3)
Previous fracture in the last 180 days 43,569 (13.7) 32,564 (13.7) 11,005 (13.8)
Transfer ability
 Independent (0) 207,607 (65.4) 155,698 (65.4) 51,909 (65.2)
 Supervision or set up help (1, 2) 43,085 (13.6) 32,292 (13.6) 10,793 (13.6)
 Limited assistance (3) 28,550 (9.0) 21,244 (8.9) 7306 (9.2)
 Extensive or maximal assistance (4, 5) 27,608 (8.7) 20,750 (8.7) 6858 (8.6)
 Total dependence or did not occur (6, 8) 10,771 (3.4) 8027 (3.4) 2744 (3.4)
Primary mode of locomotion indoors
 No aid 117,271 (36.9) 88,060 (37.0) 29,209 (36.7)
 Cane or walker 158,444 (49.9) 118,524 (49.8) 39,918 (50.1)
 Scooter, wheelchair, or did not occur 41,911 (13.2) 31,427 (13.2) 10,483 (13.2)
Cognitive performance scale
 Intact (0) 107,057 (33.7) 80,222 (33.7) 26,833 (33.7)
 Mild impairment (1, 2) 162,604 (51.2) 121,648 (51.1) 40,954 (51.4)
 Moderate impairment (3, 4) 34,339 (10.8) 25,883 (10.9) 8455 (10.6)
 Severe impairment (5, 6) 13,626 (4.3) 10,258 (4.3) 3368 (4.2)