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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Neurotoxicol Teratol. 2011 Aug 10;33(5):558–566. doi: 10.1016/j.ntt.2011.08.003

Table 4.

Mulitvariable Models of Associations between Maternal Phthalate and BPA Measures at Two Times and Early Infant Neurobehavior for NNNS Scales with Significant Bivariate Findings at p<.10

NNNS Subscale Covariates Included n Beta SE p
DBP

Arousal – 26w 332 −0.072 0.036 0.04
 Higher DBP exposure
 associated with lower
 (improved) arousal
Log2 creatinine 0.105 0.052 0.04
Age at exam 0.011 0.008 0.16
Sex −0.015 0.078 0.84
Weight change −.0002 .0001 0.07
Drink1 −0.060 0.085 0.48
Drink2 −0.270 0.113 0.02
Log2 cotinine max 0.014 0.011 0.18

Regulation – 26w 329 0.080 0.041 0.05
 Higher DBP exposure
 associated with higher
 (improved) self-
 regulation
Log2 creatinine −0.109 0.060 0.07
Age at exam −0.001 0.009 0.91
Sex −0.144 0.089 0.11
Weight change 0.0004 0.0002 0.02
Marital status1 −0.419 0.137 0.002
Marital status 2 −0.246 0.123 0.05
Drink1 0.063 0.097 0.52
Drink2 0.242 0.129 0.06
High risk status −0.195 0.132 0.14

Handling - 26w 325 −0.038 0.016 0.02
 Higher DBP exposure
 associated with less
 handling needed
Log2 creatinine 0.049 0.023 0.03
Age at exam 0.005 0.003 0.12
Sex −0.030 0.034 0.39

Movement Quality – 26w 339 0.054 0.029 0.067
 Higher DBP exposure
 associated with trend of
 improved movement
 quality
Log2 creatinine −0.100 0.043 0.02
Age at exam 0.014 0.006 0.02
Sex −0.060 0.063 0.34
Marital status1 −0.262 0.097 0.008
Marital status 2 −0.130 0.087 0.14
High risk status −0.393 0.095 <.0001

Hypotonia* - 16w 346 0.186 0.114 0.10
Log2 creatinine −0.037 0.166 0.82
Age at exam −0.035 0.026 0.17
Sex −0.109 0.258 0.67
Hypotonia* - 26w 332 0.197 0.122 0.11
Log2 creatinine −0.167 0.175 0.35
Age at exam −0.36 0.027 0.18
Sex 0.030 0.264 0.91

DEHP

Nonoptimal Reflexes **
26w males
158 0.216 0.090 0.02
 Higher DBP exposure
 associated with more
 nonoptimal reflexes
Log2 creatinine −0.018 0.140 0.90
Age at exam −0.011 0.024 0.65
Income 0.005 0.003 0.14
Weight change 0.0003 0.0004 0.52
26w females 174 0.019 0.082 0.82
Log2 creatinine −0.034 0.143 0.81
Age at exam 0.016 0.028 0.58
Income 0.007 0.004 0.05
Weight change 0.0003 0.0005 0.52

BPA

Hypotonia* - 16w 346 0.179 0.104 0.09
 Higher BPA exposure
 associated with trend of
 more hypotonia
 (reduced tone)
Log2 creatinine 0.067 0.153 0.66
Age at exam −0.038 0.026 0.14
Sex −0.118 0.261 0.65
Black race −0.341 0.310 027
*

Logistic regression applied. Manuscript text reports odds ratio.

**

Sex by phthalate interaction p-values: non-optimal reflexes and DEHP at 26 weeks p=0.04

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