Table 3.

Optimal hybrid tree-based model (GPLTR) analysis for vaccine hesitancy.

	OR [95% CI]	p-value
Age (Ref: <60 years)	0.70 [0.49–1.01]	0.056
Groups (leaves of the tree)
Annual household income before the pandemic >$100,000 AND graduate/university level of education	Ref.
Annual household income before the pandemic >$100,000 AND college or less level of education AND no decrease of monthly household income	1.97 [0.98–3.95]	0.058
Annual household income before the pandemic >$100,000 AND college or less level of education AND decrease of monthly household income	7.34 [3.28–16.44]	<0.001
Annual household income before the pandemic between $50,000 and $100,000 AND born in Canada AND retired	1.32 [0.63–2.76]	0.47
Annual household income before the pandemic between $50,000 and $100,000 AND born in Canada AND not retired	3.61 [2.14–6.08]	<0.001
Annual household income before the pandemic < $50,000 and AND born in Canada	4.83 [2.81–8.31]	<0.001
Annual household income before the pandemic < $100,000 AND born outside Canada	11.75 [6.56–21.05]	<0.001

CI, Confidence interval; GPLTR, Generalized Partially Linear Tree-based Regression; OR, odds ratio; ref, reference.