Question

Problem #1

1. A study is conducted to estimate the association between exposure to lead paint in childhood and attention-deficit hyperactivity disorder (ADHD). Data on n = 400 children are collected, and data on exposure and ADHD diagnosis are shown in Table 9–26.

TABLE 9–26 Exposure to Lead Paint and ADHD
Exposure to Lead Paint	ADHD	No ADHD	Total
Yes	34	71	105
No	29	266	295

The information from Problem #1 is needed to answer Question 2.

TABLE 9–27 Exposure to Lead Paint and ADHD by Father’s Diagnosis
Father with ADH
Exposure to Lead Paint	ADHD	No ADHD
Yes	27	39
No	7	37
Father without ADHD
Exposure to Lead Paint	ADHD	No ADHD
Yes	7	32
No	22	229

2. In the study described in Problem #1, data are also available reflecting whether or not the child’s father has ADHD. The relationship between the father’s diagnosis, the child’s exposure to lead paint, and the child’s diagnosis are shown in Table 9–27.

a. Estimate the relative risks and odds ratios for a child’s diagnosis of ADHD relative to exposure to lead paint, stratified by the father’s diagnosis of ADHD (i.e., for fathers with and without the diagnosis).

b. How do the results in Part (a) of this problem compare to the results in Problem 1.

Answer 1