Table 2.

Differences in Growth in Out of Pocket Costs Between Country Groupings

	Predicted Mean Percent Change in OOP/Capita 1994–2004 vs. 2004–2014	p-value
Group 1 - Historically low OOP costs with higher recent growth	3.63	reference group
Group 2 - Historically moderate OOP costs with lower recent growth	−3.00	< 0.001
Group 3 - Historically high OOP costs with low to no recent growth	−3.56	< 0.001