Page 113 - Physical activity in recipients of solid organ transplantation - Edwin J. van Adrichem

Physical activity in recipients of solid organ transplantation
model including the non-linear e

.
Figure 1.
Flowchart of inclusion of participants’ data
Testing of possible non-linearity of age in predicting the level of PA resulted in a
signi

cant e

ect of the spline variable, indicating a non-linear association (Figure 2).
e
ect of age explained an additional 8% in variance
compared to the model with age as a linear explanatory variable (
p
-value <.001). Data
visualization of other explanatory variables did not suggest other non-linear relationships
needing to be tested. Signi
limitations, and low expectations and self-con

cant linear variables in the
dence.

e
nal model associated with lower
levels of PA included being female, not actively working or being retired, physical

nal model explained 30%
(adjusted R2
) of the variation in PA.
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