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Table 1 Selection and Enrollment According to Women's PCE Exposure Status, Cape Cod, Massachusetts

From: Prenatal exposure to tetrachloroethylene-contaminated drinking water and the risk of congenital anomalies: a retrospective cohort study

 

Initial Exposure Status*

 

Number Exposed

Number Unexposed

Total Number

Selected

1,492

1,704

3,196

Excluded during

Enrollment

   

   Never located

132

136

268

   No response

245

336

581

   Ineligible or Deceased

7

8

15

   Refusal

149

137

286

Returned Questionnaire

959

1,087

2,046

% of selected

64.3%

63.8%

64.0%

% of located

70.5%

69.3%

69.9%

  1. *The exposure status was based on the initial visual assessment. See text for details.