Table 1.
Baseline characteristics of patients in the primary analysis.
| Characteristics | Total (N = 10,000) | Before tuning (n = 5,000) | After tuning (n = 5,000) | P-value |
|---|---|---|---|---|
| Age, years | 48.5 ± 11.6 | 47.6 ± 11.5 | 49.4 ± 11.6 | < 0.001* |
| Sex (female) | 4345 (43.5%) | 2153 (43.1%) | 2192 (43.8%) | 0.443 |
| BMI | 23.1 ± 3.52 | 23.0 ± 3.48 | 23.1 ± 3.56 | 0.078 |
| Medical history | ||||
| Hypertension | 1706 (17.1%) | 812 (16.2%) | 894 (17.9%) | 0.067 |
| Diabetes mellitus | 395 (4.0%) | 187 (3.7%) | 208 (4.2%) | 0.504 |
| Dyslipidemia | 1670 (16.7%) | 827 (16.5%) | 843 (16.9%) | 0.379 |
| Arrhythmia | 573(5.7%) | 290 (5.8%) | 283 (5.7%) | 0.761 |
| Stroke | 34 (0.34%) | 13 (0.26%) | 21 (0.42%) | 0.389 |
| Dementia | 8 (0.08%) | 3 (0.06%) | 5 (0.1%) | 0.843 |
| Surgery | 3316 (33.2%) | 1615 (32.3%) | 1701 (34.0%) | 0.184 |
| Cerebral aneurysm | < 0.001* | |||
| None | 8962 (89.6%) | 4422 (88.4%) | 4540 (90.8%) | |
| Suspicion | 838 (8.4%) | 478 (9.6%) | 360 (7.2%) | |
| Definite | 200 (2.0%) | 100 (2.0%) | 100 (2.0%) | |
Data are represented as the mean ± standard deviation or n (%).
BMI body mass index.
*P < 0.05.