Table 2.

The results of Poisson regression.

Variables		No of PH (Person No/Person Year)
		Total (1997–2013)
		RR	95% CI		p
			Lower	Upper
Pre vs. Post	Pre (Baseline)	-	-	-	-
	Post	0.739	0.722	0.757	<0.0001
Patient’s Characteristics
Gender	Female (Baseline) Male	-	-	-	-
		1.146	1.119	1.173	<0.0001
Age	Every 10 years old	1.005	0.988	1.012	0.977
Comorbidities (CCI)	Every 1 score	2.152	2.116	2.188	<0.0001
Insurance Premium	<USD 620 (Baseline)	-	-	-	-
	Dependency	0.945	0.918	0.973	0.001
	USD 620–760	0.868	0.841	0.897	<0.0001
	USD 761–1210	0.765	0.720	0.813	<0.0001
	USD 1211–1526	0.721	0.672	0.773	<0.0001
	>USD 1526	0.725	0.673	0.780	<0.0001
Provider’s Characteristics
Location	North (Baseline)	-	-	-	-
	West	1.182	1.147	1.219	<0.0001
	South	1.122	1.092	1.152	<0.0001
	East	1.196	1.104	1.296	<0.0001
	Off-Island	1.150	1.061	0.914	0.436
Level	Med Center (Baseline)	-	-	-	-
	Reginal Hospital	1.057	1.016	1.099	0.006
	District Hospital	0.985	0.946	1.026	0.473
	Clinics	0.834	0.807	0.862	<0.0001