Table 2. Simple linear and polynomial regression statistics assessing the association between all-cause age-specific mortality trends and age-specific population size trends, Qatar, both genders.

Age group	Year	All-cause death rate (per 100,000)	Annual percent change (%)	Population (thousand)	Population growth (%)	R-squared	p-value
Under 5 years	1990	446	-	52		0.837a	0.0105
	1995	397	-2.2	49	-1.2
	2000	344	-2.7	56	2.9
	2005	293	-2.9	72	5.8
	2010	256	-2.5	89	4.9
	2015	188	-5.4	132	9.7
5–14 years	1990	40	-	83		0.988b	0.0013c
	1995	38	-1.4	84	0.2
	2000	33	-2.4	98	3.4
	2005	27	-3.4	125	5.4
	2010	23	-3.6	149	3.9
	2015	18	-4.2	215	8.8
15–49 years	1990	159	-	306		0.953a	0.0008c
	1995	168	1.2	330	1.6
	2000	168	-0.1	384	3.3
	2005	138	-3.6	552	8.7
	2010	98	-5.8	1382	30.0
	2015	87	-2.2	1705	4.7
50–69 years	1990	849	-	32		0.914a	0.0029
	1995	918	1.6	34	1.5
	2000	909	-0.2	50	9.2
	2005	741	-3.7	82	13.0
	2010	498	-6.6	134	12.6
	2015	515	0.7	167	4.9
70+ years	1990	7,054		3		0.892a	0.0045
	1995	7,164	0.3	4	3.9
	2000	6,666	-1.4	5	6.3
	2005	6,111	-1.7	6	2.4
	2010	3,988	-6.9	12	19.6
	2015	4,080	0.5	17	8.1

a: simple linear regression

b: polynomial regression order 2

c: statistically significant (F-test)