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Table 2 Post-cardiac surgery patients’ descriptive analysis for continuous variables mean comparison through t-test

From: Post-surgery survival and associated factors for cardiac patients in Ethiopia: applications of machine learning, semi-parametric and parametric modelling

Variable

Definition

Overall mean

Outcome variable

Standard deviation

T-test

P value

Average Censored

Average Death

Age

Baseline Age of cardiac patient

24.44

23.52003

34.93443

18.65899

-6.5693

< 0.001

Weight in KG

Baseline Weight of cardiac patient

42.48

41.65737

51.86885

22.3574

-4.8743

< 0.001

Systolic Blood Pressure

Baseline Systolic Blood Pressure

107.09

106.9979

108.2049

13.65917

-0.9361

0.349

Diastolic blood pressure

Baseline Diastolic Blood Pressure

66.88

66.82475

67.57377

10.92499

-0.7261

0.468

Pulse rate

Baseline Pulse rate

84.48

84.47568

84.46721

19.11724

0.0047

0.996

SPO2

Baseline Oxygen saturation

94.73

95.07797

90.72951

3.949677

12.2183

< 0.001

INR

International normalized ratio

2.62

2.644356

2.441148

0.7456696

2.8937

0.004

Ejection fraction

Post-surgery Ejection Fraction

59.05

59.32797

55.81148

6.774005

5.5526

< 0.001

ICU stay

Post-surgery Intensive care unit stay

1.91

1.918455

1.786885

1.085273

1.2845

0.199

Cardiac center duration

Post Length of Cardiac Center Stay in days

7.46

7.561516

6.319672

4.721736

2.7922

0.005

Waiting time

Time to surgery

480.55

483.8208

443.0861

600.3805

0.7186

0.473

Hemoglobin

 

12.33

12.38736

11.7042

1.68298

4.3249

< 0.001

Creatinine

 

0.70

0.6805579

0.9468033

0.2774684

-10.5253

< 0.001