Table 2.

Full data from predictors identified with statistical significance on multivariate analysis according to the outcome variable PEI/ICC score

Outcome—PEI/ICC score (linear regression)
Predictor variables in the model	Coef.	Std. error	P value	VIF	t value
JSPPPE-VP score	0.155	0.023	<0.001	1.005	6.679
Age category	−0.124	0.033	<0.001	1.126	−3.718
Educational level	0.121	0.029	<0.001	1.126	4.178
(Constant)	0.770	0.189	<0.001	—	4.085

R²: 0.158 (adjusted to 0.153). A Poisson regression was performed with the same predictors, to confirm the best fitness of the linear regression (adapted from McCullagh and Nelder (20)). Excluded variables from this model (due to non-significance) were: gender, being professionally active and taking chronic medication. VIF, variance inflation factor for collinearity.