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Table 3 Relationship between adverse reproductive outcomes and estimated fish mercury exposure, stratified by race, all live births, South Carolina, 1995-2005 a

From: Mercury in fish and adverse reproductive outcomes: results from South Carolina

Exposure estimate

Low birth weight

Preterm birth

 

European American

African American

European American

African American

 

(n = 218,319)

(n = 118,241)

(n = 217,187)

(n = 117,697)

 

OR

95% CI

OR

95% CI

OR

95% CI

OR

95% CI

Predicted Mercury in Fishb

        

  Quartile 1

Ref

-

Ref

-

Ref

-

Ref

-

  Quartile 2

1.01

0.96, 1.07

1.06

1.00, 1.13

1.06

1.02, 1.11

1.14

1.08, 1.21

  Quartile 3

0.98

0.92, 1.04

1.13

1.07, 1.20

1.03

0.98, 1.08

1.18

1.11, 1.25

  Quartile 4

0.96

0.91, 1.02

1.13

1.07, 1.20

0.96

0.92, 1.01

1.10

1.04, 1.17

Fish Advisory Categories

        

  <0.25 ppm

Ref

-

Ref

-

Ref

-

Ref

-

  0.25-0.66 ppm

0.95

0.90, 1.00

1.10

1.05, 1.15

0.96

0.92, 1.00

1.12

1.07, 1.17

  0.67-0.99 ppm

0.95

0.90, 1.01

1.08

1.02, 1.14

0.92

0.87, 0.97

1.01

0.95, 1.06

  ≥1.0 ppm

0.97

0.97, 1.07

1.18

1.07, 1.30

0.98

0.90, 1.07

1.13

1.02, 1.24

8-Kilometer Buffer Zones

        

  No restrictions

Ref

-

Ref

-

Ref

-

Ref

-

  1 meal a week

0.88

0.82, 0.94

1.04

0.98, 1.10

0.96

0.91, 1.02

1.06

1.00, 1.12

  1 meal a month

1.08

0.98, 1.19

1.14

1.06, 1.23

0.86

0.79, 0.94

0.86

0.80, 0.93

  Do not eat

0.94

0.86, 1.02

1.15

1.08, 1.24

0.96

0.89, 1.03

0.98

0.92, 1.05

  1. aAdjusted for: mother’s age, education, smoking status, the number of previous live births and stillborns. bBased on kriged interpolation model, Q1: ND-0.17 ppm; Q2: >0.17-0.29 ppm; Q3: >0.29-0.62 ppm; Q4: >0.62 ppm. Q: quartile; OR: odds ratio; CI: confidence interval; ppm: parts per million. N’s are smaller than those presented in Table 1 due to missing data.
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International Journal of Health Geographics

ISSN: 1476-072X