Table 3 –
Clinical and Imaging Outcomes Upon Arrival In the Comprehensive Center According To The Inter-Hospital Arterial Recanalization Status
| Overall N=520 |
Recanalization N=111 |
No Recanalization N=409 |
P-value | |
|---|---|---|---|---|
| NIHSS change during transfer (n=502)a | 0 (−3 ; 2) | −6 (−9 ; −1) | 0 (−2 ; 2) | <0.01 |
| Infarct growth, mL (n=313)b | 8.7 (1.4–23.9) | 1.5 (0–11.7) | 11.6 (2.1–25.9) | <0.01 |
| MRI-to-MRI (n=136) | 3.8 (0.8–18.8) | 0 (0–2.9) | 7.2 (1.4–19.7) | <0.01 |
| CTP-to-MRI (n=177) | 12.2 (2.5–26.6) | 3.2 (0.5–20.0 | 13.8 (4.8–28.6) | <0.01 |
| Any hemorrhagic transformation (n=479)c | 23 (5) | 8 (8) | 15 (4) | 0.14 |
| Endovascular therapy performed | 324 (62) | 23 (21) | 301 (74) | <0.01 |
Categorical variables are expressed as numbers (%) and continuous variables as median (interquartile range).
Defined as NIHSS at the comprehensive center – NIHSS at the referring hospital. A negative value indicates clinical improvement and a positive value clinical deterioration. Data missing in 18/520 (3%) patients (2 [2%] in the recanalization group and 16 [4%] in the non recanalization group).
Infarct growth was assessed in patients with MRI in both hospitals, or with CT-perfusion in the referring hospital and MRI upon arrival in the comprehensive center (see Methods for details). Data was missing in 207/520 (40%) patients (46 [41%] in the recanalization group and 161 [39%] in the non recanalization group).
Inter-hospital hemorrhagic transformation was not available in 41/520 (8%) patients with direct transfer to angiosuite (i.e. lack of non-invasive control imaging upon arrival in the comprehensive center); 4 [4%] in the recanalization group and 37 [9%] in the non recanalization group).