Skip to main content

Table 9 Hypothesis testing summary

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

 

Beta-HCH

DDE

Oxychlordane

PBDE47

PCB118

PCB138

PCB153

PCB180

Transnonachlor

PFHxS

PFOA

PFOS

Increasing parity

-

-

-

NS

-

-

-

NS*

-

-

-

-

Increasing maternal age

NA

+

+

NS*

NA

+

+

+

NA

-

-

NS*

Current smokers

-

-

-

NS*

-

-

+

-

-

NS*

-

NS*

High household income > $100,000 CDN

+

NS*

+

NS*

+

+

+

+

+

NS*

+

+

High pre-pregnancy BMI

+

-

-

+

-

-

-

-

-

NS*

NS

NS

Foreign born

+

+

+

-

+

+

+

+

+

-

NS

-

Fasting at time of sample

NS

-

-

NS

NS

-

NS

NS

-

NS

NS

NS

Lower maternal education

-

-

-

NS*

-

-

-

-

-

NS

NS*

-

Sampling year (2011 vs 2008)

NA

-

-

-

-

-

-

-

-

NS

-

-

Fish consumption

+

+

+

NS*

+

+

+

+

+

NS

NS

NS

Bacon consumption

NA*

-

NS

NA*

NS*

NS

NS

NS

NS

NS

NS

NS

Hamburger consumption

-

-

NS*

NS

-

-

-

-

NS*

NS

NS

NS

Pork consumption

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

Poultry consumption

NS

NS

NS*

NS

NS*

NS

NS*

NS*

NS

NS

NS

NS

Steak consumption

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

NS

Cook with non-stick cooking vessels

         

NS

+

NS

  1. NA = not sufficient detection (>70 % below LOD) in categories for analysis
  2. NA* = significant interaction with chemical and lipids. See Additional file 1 for details
  3. NS = No statistically significant differences between groups
  4. NS* = overall a significant effect was seen for this characteristic (i.e. parity, maternal age, smoking status, income, BMI, education level) but the test could not identify with sufficient confidence which pairs of means differ. The Bonferroni-adjusted confidence intervals are a very conservative method
  5. - means a significant negative association (e.g. as parity increases DDE concentrations decrease)
  6. + means a significant positive association (e.g. as maternal age increases DDE concentrations increase)