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Table 2 Comparison of emergency aSAH patients between the current period and the respective time period last year after propensity score matching (PSM)

From: Management protocol for emergency aneurysm craniotomy clipping in non-major COVID-19 epidemic areas in Beijing, China

Characteristics Current Last year P valuea
No. of patients 9 9  
No. of aneurysms 10 10  
Sex (male) 5 (55.6) 4 (44.4) > 0.99
Age, years 50.11 ± 9.3 45.3 ± 11.3 0.342
Admission stratification
 Normal patient 6 (66.7)   
 Mild suspected patient 3 (33.3)   
 Suspected patient 0 (0.0)   
 Confirmed patient 0 (0.0)   
COVID-19 NAT (n = 2) (negative) 2 (100.0)   
False negative COVID-19 NAT 0 (0.0)   
Location of responsible aneurysm
 ACoA 3 (33.3) 3 (33.3) 0.842
 PCoA 3 (33.3) 2 (22.2)
 ACA 0 (0.0) 0 (0.0)
 MCA 3 (33.3) 4 (44.4)
 Others 0 (0.0) 0 (0.0)
Fisher grade 3.0 ± 1.2 2.9 ± 1.1 0.839
Modified Fisher grade 3.2 ± 1.0 2.7 ± 1.2 0.302
Hunt-Hess grade 2.2 ± 0.4 2.2 ± 0.7 > 0.99
WFNS grade 2.4 ± 0.9 2.6 ± 1.2 0.819
GCS 12.6 ± 1.8 12.3 ± 2.3 0.825
Duration between rupture and craniotomy, h 56.9 ± 52.8 56.2 ± 60.5 0.980
Duration between admission and craniotomy, h 35.6 ± 15.3 31.9 ± 12.3 0.577
Preoperative adverse events during hospitalization
 Rebleeding 0 (0.0) 0 (0.0) > 0.99
 Infarction 0 (0.0) 0 (0.0) > 0.99
 Epilepsy 0 (0.0) 0 (0.0) > 0.99
Duration of surgery, h 3.7 ± 1.1 4.9 ± 2.9 0.264
Intraoperative blood loss, ml 188.9 ± 126.9 266.7 ± 188.7 0.320
Mean hospital LOS, days 17.4 ± 13.9 17.9 ± 9.0 0.937
Hospitalization cost, dollarsb 17,354.9 ± 12,110.1 13,147.1 ± 4200.9 0.339
Postoperative complications
 Postoperative hemorrhage 0 (0.0) 0 (0.0) > 0.99
 Postoperative DCI 4 (44.4) 4 (44.4) > 0.99
 Postoperative DVT 3 (33.3) 1 (11.1) > 0.99
 Postoperative intracranial infection 2 (22.2) 2 (22.2) > 0.99
Discharge mRS score
 Mean 1.8 ± 1.7 2.0 ± 1.7 0.788
 0–2 7 (77.8) 6 (66.7) > 0.99
 3–6 2 (22.2) 3 (33.3)
  1. Values are numbers of cases (%) unless otherwise indicated. Mean values are presented with SDs
  2. ACA anterior cerebral artery, ACoA anterior communicating aneurysm, aSAH aneurysmal subarachnoid hemorrhage, COVID-19 coronavirus disease 2019, CT computed tomography, DCI delayed cerebral ischemia, DVT deep vein thrombosis, GCS Glasgow Coma Scale, LOS length of stay, MCA middle cerebral artery, mRS modified Rankin Scale, NAT nucleic acid testing, PCA posterior cerebral artery, WFNS World Federation of Neurological Surgeons
  3. aP values indicate differences between the current period and the respective time period, and P less than 0.05 was considered statistically significant
  4. bThe exchange rate between RMB and USD is 1 USD = 7.0942 RMB