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Table 3 Time variables and major neurological improvement

From: Collateral status evaluation coupled with time window by dynamic axial computed tomographic angiography with a focus on the middle cerebral artery for mechanical thrombectomy

  NIHSS score decrease ≥ 50% at 24 h NIHSS score decrease < 50% at 24 h P
Collateral status: Poor
 n 10 9  
 ASPECTS 10 (10–10) 6 (3.5–8) < 0.001
 OtD hours 1.07 (0.63–3.74) 1.92 (1.18–8.73) ns
 DtI hours 0.35 (0.26–0.41) 0.43 (0.33–0.51) ns
 ItP hours 0.83 (0.55–0.99) 1.21 (0.78–2.0) ns
 PtR hours 0.52 (0.38–0.72) 1.15 (0.74–1.68) < 0.01
 OtR hours 3.26 (2.50–5.35) 5.48 (4.14–11.25) < 0.05
Collateral status: Intermediate
 n 21 4  
 ASPECTS 10 (7–10) 9 (7.5–9.8) ns
 OtD hours 1.83 (0.86–7.96) 11.58 (9.15–13.52) < 0.05
 DtI hours 0.38 (0.28–0.54) 0.44 (0.38–0.52) ns
 ItP hours 0.8 (0.61–1.39) 1.01 (0.72–2.08) ns
 PtR hours 0.55 (0.46–0.95) 0.96 (0.5–1.36) ns
 OtR hours 5.12 (2.9–9.53) 13.98 (11.02–17.20) < 0.05
Collateral status: Good
 n 3 1  
 ASPECTS 10 (7–10) 9  
 OtD hours 7.33 (4.12–12.4) 1.88  
 DtI hours 0.42 (0.33–1.5) 0.32  
 ItP hours 1.15 (0.75–1.35) 1.26  
 PtR hours 0.33 (0.25–0.97) 2.25  
 OtR hours 8.67 (7.93–14.3) 5.72  
Collateral status: Good or Intermediate
 n 24 5  
 ASPECTS 10 (7.3–10) 9 (8–9.5) ns
 OtD hours 3.49 (0.91–9.02) 11.08 (5.19–13.04) < 0.05
 DtI hours 0.39 (0.28–0.55) 0.38 (0.35–0.51) ns
 ItP hours 0.81 (0.63–1.38) 1.24 (0.74–1.81) ns
 PtR hours 0.54 (0.43–0.96) 1.26 (0.55–1.82) ns
 OtR hours 5.64 (3.26–10.40) 13.97 (7.88–16.13) < 0.05
  1. All values are represented as median (interquartile range) unless specified otherwise
  2. OtD Onset-to-door time, ItP Imaging-to-puncture time, OtR Onset-to-reperfusion time