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Table 3 The Wilcoxon Rank - Sum test for two variables without a normal distribution between two groups

From: Long-term survival of femoral neck fracture patients aged over ninety years: Arthroplasty compared with nonoperative treatment

VariablesTreatment regimeWilcoxon WP
Nonoperative group
Median(P75-P25)
Arthroplasty group
Median(P75-P25)
Age91.5 (4.0)92.0 (4.0)805.00.530
Length of stay8 (17)18 (59)458.5<0.001*
Delay of Admission3 (9.60)1 (3.71)630.50.053*
Survival time (months)22 (52)53 (59)514.00.001*
BMI17.7 (3.2)19.1 (3.0)582.00.009*
Laboratory parameters
 WBC7.23 (3.83)7.95 (3.68)846.00.914
 Platelets166 (98)161 (119)794.00.475
 BUN7.51 (5.86)6.92 (3.47)791.50.461
 INR1.09 (0.11)1.08 (0.12)742.00.239
 Creainine75.50 (46)79.60 (37)849.00.821
 Sodium138.15 (7.20)139.20 (6.90)874.00.996
 Billirubin13.05 (10.60)14.60 (7.40)746.00.254
  1. *P < 0.05 was considered statistically significant