Table 3 The Wilcoxon Rank - Sum test for two variables without a normal distribution between two groups
Variables | Treatment regime | Wilcoxon W | P | |
|---|---|---|---|---|
Nonoperative group Median(P75-P25) | Arthroplasty group Median(P75-P25) | |||
Age | 91.5 (4.0) | 92.0 (4.0) | 805.0 | 0.530 |
Length of stay | 8 (17) | 18 (59) | 458.5 | <0.001* |
Delay of Admission | 3 (9.60) | 1 (3.71) | 630.5 | 0.053* |
Survival time (months) | 22 (52) | 53 (59) | 514.0 | 0.001* |
BMI | 17.7 (3.2) | 19.1 (3.0) | 582.0 | 0.009* |
Laboratory parameters | ||||
 WBC | 7.23 (3.83) | 7.95 (3.68) | 846.0 | 0.914 |
 Platelets | 166 (98) | 161 (119) | 794.0 | 0.475 |
 BUN | 7.51 (5.86) | 6.92 (3.47) | 791.5 | 0.461 |
 INR | 1.09 (0.11) | 1.08 (0.12) | 742.0 | 0.239 |
 Creainine | 75.50 (46) | 79.60 (37) | 849.0 | 0.821 |
 Sodium | 138.15 (7.20) | 139.20 (6.90) | 874.0 | 0.996 |
 Billirubin | 13.05 (10.60) | 14.60 (7.40) | 746.0 | 0.254 |