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Table 2 Relationship between adverse reproductive outcomes and predicted mercury exposure, 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 (N = 359,804)

Preterm birth (N = 357,996)

 

Odds ratio

95% Confidence interval

Odds ratio

95% Confidence interval

Predicted Mercury in Fishb

    

  Quartile 1 (≤0.17 ppm)

Ref

-

Ref

-

  Quartile 2 (>0.17-0.29 ppm)

1.03

0.99, 1.07

1.09

1.06, 1.13

  Quartile 3 (>0.29-0.62 ppm)

1.06

1.02, 1.10

1.09

1.05, 1.13

  Quartile 4 (>0.62 ppm)

1.04

1.00, 1.09

1.02

0.98, 1.06

Fish Advisory Categories

    

  <0.25 ppm

Ref

-

Ref

-

  0.25-0.66 ppm

1.03

1.00, 1.07

1.03

1.00, 1.06

  0.67-0.99 ppm

1.02

0.98, 1.06

0.96

0.93, 0.99

  ≥1.0 ppm

1.06

0.99, 1.14

1.03

0.97, 1.10

8-Kilometer Buffer Zones

    

  No restrictions

Ref

-

Ref

-

  1 meal a week

0.95

0.91, 1.00

1.01

0.97, 1.05

  1 meal a month

1.09

1.03, 1.16

0.86

0.82, 0.91

  Do not eat

1.05

1.00, 1.11

0.97

0.92, 1.01

  1. aAdjusted for: mother’s age, race, education, smoking status, and number of previous live births and stillborns bBased on kriged interpolation model (see Figure 1) ppm: parts per million. N’s are smaller than those presented in Table 1 due to missing data). ND - below the limit of detection.
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International Journal of Health Geographics

ISSN: 1476-072X