Table 6.

Pearson correlation coefficients (PCC) and Shapiro–Wilk tests

Pearson correlation coefficient			Shapiro–Wilk test
Rank	Feature	abs(PCC)	Rank	Feature	p-value
1	Serum creatinine	0.294	1	Creatinine phosphokinase	7.05×10−28
2	Ejection fraction	0.269	2	Serum creatinine	5.39×10−27
3	Age	0.254	3	Smoking	4.58×10−26
4	Serum sodium	0.195	4	Death event	4.58×10−26
5	High blood pressure	0.079	5	Sex	1.17×10−25
6	Anaemia	0.066	6	High blood pressure	1.17×10−25
7	Creatinine phosphokinase	0.063	7	Diabetes	5.12×10−25
8	Platelets	0.049	8	Anaemia	6.21×10−25
9	Smoking	0.013	9	Platelets	2.89×10−12
10	Sex	0.004	10	Serum sodium	9.21×10−10
11	Diabetes	0.002	11	Ejection fraction	7.22×10−09
			12	Age	5.34×10−05

Results of the univariate application of the Pearson correlation coefficient between each feature and the target feature death event, absolute value (left), and the univariate application of the Shapiro–Wilk test on each feature (right)