Table 4. The relative contributions of decreasing trend of exomphalos prevalence of each city in Liaoning Province during 2006–2015.

City	Decreasing trend		Increasing trend
	β	Contribution rate (%)	β	Contribution rate (%)
Shenyang	−0.03	5.36	—	—
Dalian	−0.02	2.37	—	—
Anshan	−0.05	7.41	—	—
Fushun	−0.10	15.14	—	—
Benxi	−0.12	19.24	—	—
Dandong	−0.01	1.58	—	—
Jinzhou	—	—	0.04	15.50
Yingkou	−0.18	28.39	—	—
Fuxin	−0.01	1.10	—	—
Liaoyang	—	—	0.03	11.63
Panjing	—	—	0.13	49.22
Tieling	−0.12	18.14	—	—
Chaoyang	—	—	0.06	23.64
Huludao	−0.01	1.26	—	—