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Table 1 Summary statistics of CH and other pollutant indices in China

From: Maternal exposure to PM2.5 may increase the risk of congenital hypothyroidism in the offspring: a national database based study in China

Indicators a

Mean

SD

P25

P50

P75

CH

4.049

4.570

2.818

3.615

5.038

PM2.5

58.131

16.842

48.142

57.458

67.688

PM10

100.611

27.491

81.083

102.292

116.938

AQI

88.958

20.746

77.023

89.015

103.312

Per capital GRP

51.458

22.089

35.113

41.221

63.904

Pb

2439.287

4218.210

129.150

784.650

3890.950

Hg

24.870

34.464

5.025

10.550

30.575

As

3484.770

7180.292

70.825

872.800

3387.625

  1. SD: standard deviation; P25, P50, P75: 25th, 50th, 75th percentile
  2. a The unit of measurement for each indicator: per 10,000 for CH; μg/m3 for PM2.5 and PM10; thousand yuan for per capital GRP; million tons for Pb, Hg and As
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BMC Public Health

ISSN: 1471-2458

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