Skip to main content

Advertisement

Table 1 Study population

From: Concentrations of persistent organic pollutants in maternal and cord blood from the maternal-infant research on environmental chemicals (MIREC) cohort study

Characteristic Frequency Percent
Maternal age group   
 <25 139 7.01
 25–29 459 23.15
 30–34 709 35.75
 35+ 676 34.09
Smoking status   
 Current 237 11.96
 Former 542 27.36
 Never 1202 60.68
Country of birth   
 Foreign born 371 18.71
 Canadian born 1612 81.29
Maternal education   
 High school or less 175 8.83
 Some college or college degree 572 28.87
 Undergraduate degree or higher 1234 62.29
Marital status   
 Married 1424 71.81
 Other 559 28.19
Income   
 ≤$50,000 347 17.49
 $50,001–$100,000 786 39.64
 More than $100,000 757 38.17
Parity   
 0 874 44.12
 1 800 40.38
 2+ 307 15.5
Body mass index (BMI)   
 Underweight to normal (BMI <25) 1164 63.36
 Overweight (25 ≤ BMI <30) 404 21.99
 Obese (BMI >30) 269 14.64
Fasting status   
 No 1914 98
 Yes 39 2
Season of sampling (1st trimester)   
 Fall 575 29.41
 Spring 448 22.92
 Summer 464 23.73
 Winter 468 23.94
Infant gender   
 Male 1034 52.51
 Female 926 47.03
Babies   
 Singletons 1934 97.53
 Twins 47 2.37
 Triplets 2 0.10
  1. Note: for income and infant gender, sum of percent is not 100, because there is a group (don’t know) was not included