Percentages of participants eligible for high school and with higher grade scores in the different dose categories, Chi-square test with 3 categories.
Note 1: *According to known treatment, N = 381.Note 2: **Dose range: 22.2–49.4 mGy, Mean: 45.2 mGy, and N = 126.Note 3: ***Dose range: 50.2–157.4 mGy, Mean: 78.2 mGy, and N = 126.Note 4: ****Higher grade score is a grade over 195.63 points.