Iodine status five years after the adjustment of universal salt iodization: a cross-sectional study in Fujian Province, China

Table 1 Number of samples by population and geographical locations in 2009 and 2017

Location	Schoo-age childrenl (n)		Adults (n)		Pregnant women (n)		Lactating women (n)
Location	2009	2017	2009	2017	2009	2017	2009	2017
Coastal urban area	155	418	61	255	90	203	93	200
Non-coastal urban area	212	505	158	310	110	253	98	250
Coastal rural area	400	631	163	363	242	313	254	301
Non-coastal rural area	160	315	63	185	101	150	111	154
Total	927	1869	445	1113	543	919	556	905

ISSN: 1475-2891