Skip to main content

Advertisement

Table 3 Distribution of cumulative PCE exposure before LMP and average monthly PCE exposure during LMP year among exposed index pregnancies

From: Prenatal drinking-water exposure to tetrachloroethylene and ischemic placental disease: a retrospective cohort study

  Cumulative exposure (g) before LMP month and year (N = 1,188).a Average monthly exposure (g) during LMP month and year (N = 1,091).a
Minimum 2.8 × 10-4 1.2 × 10-4
5th percentile 3.4 × 10-1 1.7 × 10-2
10th percentile 1.0 4.0 × 10-2
Median 28.9 0.9
75th percentile 117.2 2.9
90th percentile 333.4 7.7
Maximum 3,600 89.2
  1. Abbreviations: LMP last menstrual period, PCE tetrachloroethylene.
  2. aThere were 1,091 pregnancies that were exposed both before and during the LMP year. All pregnancies exposed during the LMP year were also exposed before the LMP year, but 97 pregnancies exposed before the LMP year were unexposed during the LMP year. Thus, average monthly exposure during the LMP year includes 1,188 exposed pregnancies (1,091 + 97).