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Table 3 Characteristics of the patients after using IPW matching

From: Being treated in higher volume hospitals leads to longer progression-free survival for epithelial ovarian carcinoma patients in the Rhone-Alpes region of France

  Low-volume hospital (n = 78 patients) High-volume hospital (n = 189 patients)   
  m m P-value % bias
Age 67.56 65.81 0.568 − 13.5
Cancer history 0.15 0.17 0.830 5.7
Ascites 0.69 0.67 0.920 − 2.5
Neoadjuvant chemotherapy 0.52 0.57 0.712 9.6
Histology:
 - HGSC 0.65 0.59 0.642 −11.7
 - LGSC 0.05 0.03 0.700 − 8.2
 - Mucinous 0.03 0.04 0.739 6.6
 -Endometrioid 0.14 0.11 0.659 − 10.6
 - Clear cell 0.05 0.05 0.995 0.1
 - Unknown 0.08 0.17 0.318 27.5
FIGO Stage:
 - I 0.15 0.15 0.920 2.3
 - II 0.08 0.07 0.916 − 2.9
 - III 0.68 0.66 0.848 − 4.7
 - IV 0.09 0.11 0.793 6.3
Tumor Grade:
 - 1 0.06 0.05 0.717 − 6.5
 - 2 0.14 0.14 0.980 − 0.6
 - 3 0.80 0.82 0.823 5.1
    Mean: 7.3
    Median: 6.3
  1. m: mean (frequency) if the covariate is continuous (binary) / % bias, also known as the standardized difference of the mean
  2. HGSC High-Grade Serous Carcinoma, LGSC Low-Grade Serous Carcinoma