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Table 2 Characteristics of patients in the unmatched and propensity-matched groups with or without continuous regional arterial infusion a

From: Continuous regional arterial infusion for acute pancreatitis: a propensity score analysis using a nationwide administrative database

  Unmatched groups P Propensity-matched groups P
Patient characteristics CRAI
(n = 247)
Non-CRAI
(n = 1,307)
CRAI
(n = 207)
Non-CRAI
(n = 207)
Mean age (years) 54.6 ± 16.4 60.6 ± 18.1 <0.001 56.7 ± 16.3 56.0 ± 17.6 0.684
Sex       
 Males 69.2% 67.6% 0.622 69.6% 66.7% 0.527
 Females 30.8% 32.4%   30.4% 33.3%  
CCI score       
 0 47.4% 43.1% 0.404 48.8% 48.3% 0.944
 1 or 2 41.7% 46.2%   42.5% 42.0%  
  ≥ 3 10.9% 10.7%   8.7% 9.7%  
JCS score       
 0 89.9% 94.3% 0.407 90.8% 92.3% 0.711
 1 to 3 6.9% 4.5%   6.8% 5.8%  
 10 to 30 2.0% 0.8%   1.4% 0.5%  
 100 to 300 1.2% 0.4%   1.0% 1.4%  
Prognostic factor score      
 0 29.1% 48.3% <0.001 34.3% 35.3% 0.970
 1 12.6% 24.3%   14.0% 14.5%  
 2 17.4% 11.1%   18.4% 15.0%  
 3 20.2% 7.8%   16.9% 16.9%  
 4 12.1% 3.6%   8.2% 8.2%  
 5 2.4% 2.3%   2.4% 2.4%  
  ≥ 6 6.1% 2.7%   5.8% 7.7%  
CT severity score      
 0 13.4% 47.8% <0.001 15.9% 15.5% 0.999
 1 9.3% 20.4%   11.1% 10.6%  
 2 38.9% 21.7%   42.0% 43.0%  
 3 23.9% 6.0%   18.4% 18.8%  
 4 14.6% 4.1%   12.6% 12.1%  
Hospital volume (per 12 months)       
  ≤ 14 21.5% 20.0% 0.324 21.7% 24.6% 0.835
 15 to 22 21.1% 26.3%   22.2% 23.7%  
 23 to 32 24.3% 24.3%   23.7% 21.3%  
  ≥ 33 33.2% 29.4%   32.4% 30.4%  
Hospital type       
 Academic 31.2% 21.3% 0.001 28.0% 24.6% 0.435
 Community 68.8% 78.7%   72.0% 75.4%  
  1. aAge shown as mean and standard deviation. Prognostic factor score and CT severity score were based on the Japanese severity scoring system for acute pancreatitis (2008 revision) [22]. CCI, Charlson comorbidity index; CRAI, Continuous regional arterial infusion; CT, Computed tomography; JCS, Japan Coma Scale.