Table 1 Baseline characteristics.
From: Identifying novel risk factors for aneurysmal subarachnoid haemorrhage using machine learning
Variable | No aSAH | aSAH | p-value |
|---|---|---|---|
n, (%) | 500,954 (99.82) | 893 (0.18) | NA |
Age at baseline, mean (SD) | 56.53 (8.1) | 58.44 (7.64) | < 0.001 |
Female, n (%) | 272,407 (54.49) | 567 (63.50) | < 0.001 |
Hypertension, n (%) | 261,542 (52.22) | 520 (58.24) | < 0.001 |
Smoking status, n (%) | < 0.001 | ||
Current | 52,689 (10.52) | 165 (18.48) | |
Previous | 172,481 (34.43) | 298 (33.37) | |
Never | 272,845 (54.47) | 423 (47.37) | |
Unknown | 2,939 (0.59) | 7 (0.78) | |
Alcohol use, n (%) | 0.001 | ||
Daily | 101,449 (20.25) | 192 (21.50) | |
Often | 244,069 (48.72) | 388 (43.45) | |
Rarely | 113,475 (22.65) | 210 (23.52) | |
Never | 40,463 (8.08) | 101 (11.31) | |
Unknown | 1,498 (0.30) | 2 (0.22) |
