Table 4 Results of GEE model (random-effects) assessing the effect of multiple variables on platelet count and haematocrit level across 6 post-operative days

Platelet count

Coef

Std error

95% CI

P value

Day

7.36

0.48

6.42 – 8.31

< 0.001

Male gender

4.87

5.53

-5.98 – 15.72

0.379

Age

-0.10

0.31

-1.61—-0.38

0.002

LV function

0.06

0.27

-0.48 – 0.59

0.838

Valve choice

-31.67

5.87

-43.18—-20.16

< 0.001

Haematocrit

Coef

Std error

95% CI

P value

Day

0.10

0.08

-0.06 – 0.27

0.221

Male gender

0.28

0.38

-0.47– 1.03

0.462

Age

0.01

0.02

-0.03 – 0.05

0.656

LV function

0.03

0.02

-0.00 – 0.07

0.088

Valve choice

-0.32

0.40

-1.10 – 0.47

0.432