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. 2018 Aug 1;6(3):42. doi: 10.3390/toxics6030042

Table 2.

Education Level and Tertiles of Exposure.

Exposure Level Less Than 9th Grade (±SE%) 9–11th Grade (Includes 12th Grade) (±SE%) High School Grad/GED Equivalent (±SE%) Some College or AA Degree (±SE%) College Graduate or Above (±SE%)
N 802 1600 2928 3587 3215
Tertile 1 61.1% (2.3) * 67.4% (2.2) + 73.8% (1.2) ^ 79.1% (1.0) ^^ 80.3% (1.4) ^^^
Tertile 2 32.1% (2.0) ** 28.6% (2.1) ++ 23.9% (1.2) 18.5% (0.9) 18.4% (1.3)
Tertile 3 5.9% (0.8) *** 3.1% (0.4) +++ 2.0% (0.4) 2.3% (0.4) 1.1% (0.3)
Total 100% 100% 100% 100% 100%

* p < 0.05 significant difference between less than 9th grade and all other education categories. ** p < 0.05 significant difference between less than 9th grade and High school graduate/GED equivalent, Some college or AA degree, and college graduate or above. *** p < 0.05 significant difference between less than 9th grade and all other educational attainments in exposure group. + p < 0.10 moderately significant difference between 9th and 11th grade (including 12th grade) and High school graduate/GED equivalent. ++ p < 0.05 significant difference between 9th and 11th grade (including 12th grade), some college or AA degree, and college graduate or above. +++ p < 0.05 significant difference between 9th and 11th grade (includes 12th grade) and High School graduate/GED equivalent, and College graduate or above. ^ p < 0.05 significant difference between High school graduate/GED equivalent and all other educational categories. ^^ p < 0.05 significant difference between some college or AA degree and High School graduate/GED equivalent, 9–11th grade (including 12th grade), and Less than 9th grade. ^^^ p < 0.05 significant difference between college graduate or above and high school graduate/GED equivalent, 9–11th grade (includes 12th grade), and less than 9th grade.