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Table 4 Regression coefficients1 and odds ratios2 (OR) from unadjusted and multivariate linear and logistic regression models of maternal serum log p,p'-DDE and birth weight, gestational age and premature birth

From: Association of maternal serum concentrations of 2,2', 4,4'5,5'-hexachlorobiphenyl (CB-153) and 1,1-dichloro-2,2-bis (p-chlorophenyl)-ethylene (p,p'-DDE) levels with birth weight, gestational age and preterm births in Inuit and European populations

 

Birth weight (grams)

Gestational age (weeks)

Prematurity

 

Regression coefficient

95% C.I.

p

Regression coefficient

95% C.I.

p

OR

95% C.I.

p

Unadjusted 3 model

        

Greenland

-71.4

(-114.7; -28.1)

< 0.01

-0.2

(-0.4; 0.0)

0.02

1.13

(0.87; 1.47)

0.37

Kharkiv

-32.2

(-90.8; 26.4)

0.28

-0.2

(-0.4; 0.0)

0.09

1.43

(0.72; 2.82)

0.31

Warsaw

-131.3

(-231.5; -31.1)

0.01

-0.5

(-0.9; -0.1)

0.02

1.45

(0.73; 2.88)

0.30

Multivariate model 3,4

        

Greenland

-56

(-99.5; -12.5)

0.01

-0.2

(-0.4; 0.0)

0.04

1.07

(0.81; 1.41)

0.64

Kharkiv

-48.9

(-109.7; 11.9)

0.12

-0.2

(-0.4; 0.0)

0.06

1.60

(0.75; 3.44)

0.23

Warsaw

-146.9

(-248.8; -45.0)

0.01

-0.6

(-1; -0.2)

< 0.01

2.44

(0.99; 6.06)

0.05

Multivariate model, with gestational age

       

Greenland

-39.4

(-79.0; 0.2)

0.05

      

Kharkiv

-30.5

(-88.7; 27.7)

0.3

      

Warsaw

-104.3

(-202.5; -6.1)

0.04

      
  1. 1 Per one unit increase of natural log p,p'-DDE
  2. 2 Per twofold increase of untransformed p,p'-DDE
  3. 3 Number of subjects in unadjusted/multivariate models: Greenland birth weight 519/519, gestational age 547/547, prematurity 547/547; Kharkiv birth weight 565/565, gestational age 577/577, prematurity 577/577; Warsaw birth weight 186/186, gestational age 198/198, prematurity 198/198
  4. 4 Models for birth weight controlled for: smoking status (Greenland); age of mother (Kharkiv); age of mother, mother's BMI (Warsaw);
  5. Models for gestational age controlled for: passive smoking (Greenland); mother's age (Kharkiv); mother's education (Warsaw);
  6. Models for prematurity controlled for: mother's education level, mother's age, mother's BMI, marital status, passive smoking (Greenland); mother's age (Kharkiv); education level, smoking status, marital status, mother's age (Warsaw);