Table 1.
Baseline characteristics of patients according to LBMI.
| Q1, n = 2,685 | Q2, n = 2,683 | Q3, n = 2,684 | Q4, n = 2,683 | P trend | |
|---|---|---|---|---|---|
| LBMI categories, range | 8.5–15.8 | 12.4–16.9 | 13.3–17.9 | 14.2–29.2 | |
| LBMI (male) | 8.5–15.8 | 15.8–16.9 | 16.9–17.9 | 17.9–29.2 | |
| LBMI (female) | 9.7–12.4 | 12.4–13.3 | 13.3–14.2 | 14.2–26.6 | |
| Men, n (%) | 1,723 (64.2) | 1,722 (64.2) | 1,722 (64.2) | 1,722 (64.2) | |
| Age, years, mean ± SD | 75.5 ± 11.1 | 71.8 ± 11.2 | 69.4 ± 11.0 | 65.0 ± 12.6 | < 0.001 |
| FMI, mean ± SD | 5.0 ± 1.7 | 6.3 ± 1.8 | 7.4 ± 2.0 | 9.3 ± 3.0 | < 0.001 |
| FMI (male) | 4.3 ± 1.6 | 5.4 ± 1.3 | 6.2 ± 1.3 | 7.7 ± 2.0 | < 0.001 |
| FMI (female) | 6.2 ± 1.1 | 8.0 ± 0.9 | 9.5 ± 0.9 | 12.2 ± 2.2 | < 0.001 |
| BMI, kg/m2, mean ± SD | 19.3 ± 1.9 | 22.0 ± 1.4 | 24.0 ± 1.3 | 27.7 ± 3.0 | < 0.001 |
| Risk factors, n (%) | |||||
| Hypertension | 2,030 (75.6) | 2,067 (77.0) | 2,232 (83.2) | 2,314 (86.3) | < 0.001 |
| Dyslipidemia | 1,192 (44.4) | 1,460 (54.4) | 1,666 (62.1) | 1,813 (67.6) | < 0.001 |
| Diabetes mellitus | 720 (26.8) | 770 (28.7) | 843 (31.4) | 1,016 (37.9) | < 0.001 |
| Smoking | 1,565 (58.3) | 1,536 (57.3) | 1,508 (56.2) | 1,577 (58.8) | 0.92 |
| Drinking | 1,006 (37.5) | 1,073 (40.0) | 1,091 (40.7) | 1,039 (38.7) | 0.29 |
| Atrial fibrillation | 799 (29.8) | 621 (23.2) | 541 (20.2) | 459 (17.1) | < 0.001 |
| Chronic kidney disease | 1,042 (38.8) | 917 (34.2) | 824 (30.7) | 780 (29.1) | < 0.001 |
| History of stroke, n (%) | 437 (16.3) | 412 (15.4) | 405 (15.1) | 388 (14.5) | 0.07 |
| Stroke subtype, n (%) | |||||
| Cardioembolism | 743 (27.7) | 573 (21.4) | 503 (18.7) | 406 (15.1) | < 0.001 |
| Small-vessel occlusion | 742 (20.4) | 868 (32.4) | 912 (34.0) | 958 (35.7) | < 0.001 |
| Large-artery atherosclerosis | 439 (16.4) | 465 (17.3) | 478 (17.8) | 485 (18.1) | 0.08 |
| Unclassified | 761 (28.3) | 777 (29.0) | 791 (29.5) | 834 (31.1) | 0.03 |
| Neurological severity | |||||
| NIHSS score, median (IQR) | 3 (1–7) | 3 (1–5) | 2 (1–5) | 2 (1–4) | < 0.001 |
| Reperfusion therapy, n (%) | 322 (12.0) | 334 (12.5) | 317 (11.8) | 267 (10.0) | 0.01 |
Data are expressed as mean ± SD, median (interquartile range), or n (%). Q1–Q4 indicate the quartiles of lean body mass index.
BMI, body mass index; FMI, fat mass index; IQR, interquartile range; LBMI, lean body mass index; Ptrend, P value for trend; SD, standard deviation; NIHSS, National Institutes of Health Stroke Scale.