Characteristics of 200 patients with subarachnoid hemorrhage selected by the propensity score matching method
| NPRIs | No NPRIs | P value | |
| Age (years) | 63.5 | 64.3 | 0.6654 |
| Age >70 years | 67 | 61 | 0.3768 |
| Female | 65 | 70 | 0.4503 |
| WFNS grades 1, 2, and 3 | 40 | 45 | 0.4745 |
| Fisher group 3 | 75 | 72 | 0.6308 |
| Anterior circulation aneurysm | 96 | 96 | 1.0000 |
| Coil/clip | 0/100 | 88/12 | <0.0001 |
NPRI, nicardipine prolonged-release implant; WFNS, World Federation of Neurological Societies.