Table 2:
Patient characteristics stratified by tube current
| Characteristic | LmA | HmA | P Value |
|---|---|---|---|
| No. of patients | 288 | 421 | |
| Age, median (IQR) (y) | 74 (62–82) | 73 (62–82) | .904 |
| Sex, male (n) (%) | 163 (56.6) | 233 (55.3) | .741 |
| History of hypertension (n) (%) | 219 (76.0) | 334 (79.3) | .299 |
| Antiplatelet treatment (n) (%) | 123 (42.7) | 191 (45.4) | .484 |
| Anticoagulant treatment (n) (%) | 49 (17.0) | 83 (19.7) | .364 |
| Admission INR (median) (IQR) | 1.03 (1.00–1.20) | 1.10 (1.00–1.20) | .331 |
| ICH location | .227 | ||
| Lobar | 130 (45.1) | 216 (51.3) | |
| Deep | 128 (44.4) | 171 (40.6) | |
| Infratentorial | 30 (10.4) | 34 (8.1) | |
| IVH presence (n) (%) | 138 (47.9) | 174 (41.3) | .083 |
| Baseline ICH volume (median) (IQR) (mL) | 18 (6–46) | 15 (6–36) | .018 |
| Baseline IVH volume (median) (IQR) (mL) | 0 (0–7) | 0 (0–3) | .074 |
| Time from symptom onset to CTA (median) (IQR) (h) | 5 (3–10) | 5 (3–10) | .342 |
| CTA spot sign presence (n) (%) | 60 (20.8) | 62 (14.7) | .034 |
| ICH expansion (n) (%) | 53 (18.4) | 68 (16.2) | .434 |
| CTDIvol (mean ± SD) (mGy) | 43.3 ± 8.9 | 71.4 ± 9.8 | <.001 |
| DLP (mean ± SD) (mGy × cm) | 1258.3 ± 618.3 | 2342.1 ± 864.7 | <.001 |
Note:—CTDIvol indicates volume CT dose index; DLP, dose-length product; INR, international normalized ratio; IQR, interquartile range; IVH, intraventricular hemorrhage.