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Table 1 Demographic characteristics of vulnerable populations by region

From: Geographical influences on the iodine status in pregnant women, neonates, and school-age children in China

Population

Demographic characteristics

Inland

Coast

Pregnant women

N

895

902

Age, mean ± SD (years)

30.4 ± 5.2

29.9 ± 4.9

Gestational age, mean ± SD (weeks)

22.3 ± 9.1

21.8 ± 9.3

Trimester, N (%)

1 (≤13 weeks)

184 (20.6)

229 (25.4)

2 (14–27 weeks)

403 (45.0)

378 (41.9)

3 (≥28 weeks)

308 (34.4)

295 (32.7)

Neonates

N

20,730

63,270

Girls, N(%)*

9759 (47.1)

29,222 (46.2)

Age, mean ± SD (days)

3.6 ± 0.8

3.6 ± 0.8

School-age children

N

1948

1936

Girls, N(%)

995 (51.1)

980 (50.6)

Age, mean ± SD (years)

8.7 ± 0.8

8.9 ± 0.8

  1. *: p < 0.05