# Table 7 Associations between exposure and motor development in terms of milestones (beta coefficients)

Milestonesss
Total Group Grasping
T = 109
♀ = 56
♂ = 53
rolling over
T = 98
♀ = 50
♂ = 48
sitting up
T = 99
♀ = 50
♂ = 49
Crawling
T = 46
♀ = 28
♂ = 18
First steps alone
T = 46
♀ = 28
♂ = 18
Sum PCB ng/g lipid −.178 .020 .212 .230 .338**
Girls NS NS NS NS NS
Boys −.371* −.427* NS NS NS
Calux-TEQ pg/g lipid .043 −.015 .015 .145 .078
Girls NS NS NS NS NS
Boys NS NS NS NS NS
PCB-118 ng/g lipid .013 −.090 −.064 −.016 .451***
Girls NS NS NS NS NS
Boys NS NS NS NS .577**
PCB-170 ng/g lipid −.081 −.043 .049 .193 .366**
Girls NS NS NS NS NS
Boys NS NS NS NS .378*
HCB ng/g lipid .049 .039 .049 .175 .330**
Girls NS NS NS NS NS
Boys NS NS NS NS .450*
DDE ng/g lipid .082 .019 −.260*** .028 .119
Girls NS NS NS NS NS
Boys NS NS −.296* NS .642**
Sum PCB*HCB −.065 −.101 −.032 .278** .463***
Girls NS NS NS .327* NS
Boys NS NS NS NS .538**
Sum PCB*DDE −.183 −.077 −.163 .279* .343**
Girls −.312* NS NS NS NS
Boys NS NS NS NS .630**
1. Milestones: see overview tests in Table 1
2. PCBs, Calux-TEQ, DDE, HCB: see blood sampling and measurements
3. Sum PCB*HCB, sum PCB*DDE: see statistical analysis
4. * = 0.050 ≤ p < 0.10, ** = 0.010 ≤ p < 0.050, *** = 0.001 ≤ p < 0.010 