Trends in suicide by hanging, strangulation, and suffocation in Serbia, 1991-2020: A joinpoint regression and age-period-cohort analysis

Table 2 Joinpoint regression analysis¹ of suicide mortality by hanging/strangulation/suffocation in both sexes in Serbia, by age, 1991-2020

Age2	Year 1991		Year 2020		Number of joinpoints	AAPC		Lower 95%CI	Upper 95%CI
	No of cases	rates	No of cases	rates
Age-specific rates3
10-19	9	0.9	4	0.6	0	- 2.71	-4.4		-1.1
20-29	56	5.8	20	2.5	0	- 1.51	-2.4		-0.6
30-39	101	8.4	45	4.7	0	- 1.21	-1.8		-0.6
40-49	133	14.1	69	7.1	0	- 1.51	-2.2		-0.8
50-59	190	17.5	100	10.8	0	- 1.41	-1.8		-1.1
60-69	219	23.7	123	12.4	0	- 2.81	-3.1		-2.4
70-79	161	48.6	107	18.5	0	- 3.51	-4.1		-2.9
80+	109	76.5	78	24.5	0	- 3.41	-3.9		-3.0
Age-standardized rates3
All ages	978	9.1	546	4.5	1	-2.11	-2.4		-1.8

¹Statistically significant trend.

²Joinpoint results are not shown for the subgroups aged < 10 yr, because during the observed period, a total of 2 cases of suicide by hanging/strangulation/suffocation deaths occurred in both sexes.

³Per 100000 people.

AAPC: Average annual percentage change; CI: Confidence interval.