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Table 2 Quality of care indicators of all 17 intervention centers in the Netherlands

From: Improving quality of stroke care through benchmarking center performance: why focusing on outcomes is not enough

  N (%) / Median (IQR) in total population (missing excluded) Center-level range (median or percentage) Total number of patients Missing N (%) P-value*
Structure
 Center volume    3279 0  
 2014 187 (6a) 0–18    < 0.001
 2015 822 (25) 1–13    < 0.001
 2016 1131 (34) 1–14    < 0.001
 2017 1139 (35) 0.3–13    < 0.001
Processes
 Time from arrival at the ED to groin puncture in non-transferred patients (min) 90 (70–119) 74–125 1292 203 (6.2) < 0.001
 Time from arrival at the ED to groin puncture in transferred patients (min) 39 (26–57) 20–60 1722 61 (1.9) < 0.001
 Use of general anesthesia 778 (25) 0–99 3082 197 (6.0) < 0.001
Outcome
 Modified Rankin Scale (mRS) score at 90 days    3065 214 (6.5) < 0.001
 mRS 0 (No symptoms) 209 (7) 1–18    
 mRS 1 (No significant disability) 471 (15) 7–26    
 mRS 2 (Slight disability) 561 (18) 4–29    
 mRS 3 (Moderate disability) 404 (13) 4–20    
 mRS 4 (Moderately severe disability) 366 (12) 7–31    
 mRS 5 (Severe disability) 168 (6) 2–11    
 mRS 6 (Dead) 886 (29) 21–36    
  1. IQR Interquartile range, ED Emergency department, EVT endovascular treatment
  2. aPercentage of all EVT patients treated in the Netherlands in that year (see Fig. 1 for details)
  3. *P-value is based on comparison between 17 centers using a non-parametric Kruskal Wallis test for continuous variables or Pearson’s chi-square statistic for categorical variables
  4. See Supplementary Table 1 for details of quality of care indicators in each intervention center