Table 4.

Differences in the regional population aging index.

Level 1 Indicators		Population Aging Index	Breadth	Depth	Speed
East	average value	0.448	0.263	5.930	0.001
	standard error	0.107	0.087	1.081	0.005
	coefficient of variation	0.239	0.331	0.182	3.579
Central section	average value	0.418	0.218	6.701	0.001
	standard error	0.070	0.052	1.253	0.004
	coefficient of variation	0.169	0.241	0.187	3.017
West	average value	0.374	0.182	7.236	0.001
	standard error	0.097	0.053	0.994	0.004
	coefficient of variation	0.258	0.292	0.137	3.899