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Table 4 Incidence rate ratios for ABC scores among DD and ASD in relation to dust phthalate concentrations, CHARGE study

From: Phthalate concentrations in house dust in relation to autism spectrum disorder and developmental delay in the CHildhood Autism Risks from Genetics and the Environment (CHARGE) study

  Hyperactivity/ Impulsivity Inattention
  IRR 95% CI IRR 95% CI
Boys and Girls     
Dimethyl phthalate 0.97 [0.82; 1.15] 1.02 [0.91; 1.14]
Diethyl phthalate 1.16 [0.95; 1.42] 1.06 [0.95; 1.19]
Dibutyl phthalate 1.35 [0.98; 1.85] 1.13 [0.91; 1.39]
Butylbenzyl phthalate 1.02 [0.86; 1.21] 1.03 [0.90; 1.18]
Di(2-ethylhexyl) phthalate 0.80 [0.61; 1.06] 1.03 [0.88; 1.20]
Boys only     
Dimethyl phthalate 0.98 [0.82; 1.17] 1.01 [0.90; 1.12]
Diethyl phthalate 1.25 [1.02; 1.54] 1.13 [1.03; 1.24]
Dibutyl phthalate 1.63 [1.22; 2.19] 1.25 [0.96; 1.62]
Butylbenzyl phthalate 1.10 [0.88; 1.37] 1.03 [0.91; 1.17]
Di(2-ethylhexyl) phthalate 0.94 [0.68; 1.30] 1.15 [0.95; 1.39]
  1. Analyses adjusted for child age at assessment, child gender and race, maternal education and date of dust collection
  2. Associations between phthalates and ABC subscales are not reported among TD because of the high prevalence of 0 score in this group (~50 %)
  3. IRR Incidence rate ratio