Table 4. The relative contributions of decreasing trend of gastroschisis prevalence of each city in Liaoning province during 2006 to 2015.

City	β	Contribution rate (%)
Shenyang	−0.18	11.84
Dalian	−0.07	4.65
Anshan	−0.12	7.78
Fushun	−0.11	7.05
Benxi	−0.12	7.85
Dandong	−0.09	5.85
Jinzhou	−0.04	2.59
Yingkou	−0.16	10.31
Fuxin	−0.10	6.58
Liaoyang	−0.10	6.72
Panjing	−0.02	1.40
Tieling	−0.23	15.03
Chaoyang	−0.15	9.64
Huludao	−0.04	2.73