Applied Statistics for the Social and Health Sciences by Gordon Rachel A

Applied Statistics for the Social and Health Sciences by Gordon Rachel A

Author:Gordon, Rachel A.
Language: eng
Format: epub
Publisher: Taylor & Francis Ltd


10.4.2: Literature Excerpt 10.3

Our second literature excerpt, published in the journal Public Health Reports, provides an example of presenting confidence intervals for regression coefficients, a practice that is standard in public health but less common in social science journals. The authors, Leo Morales, Peter Guitierrez, and Jose Escarce were interested in extending the established finding that Hispanic children have higher blood lead levels than non-Hispanic children by exploring variation in blood lead levels among Hispanic children.

Literature Excerpt 10.3 shows Table 3 from the article which presents point estimates and confidence intervals from two multiple regression models predicting children's blood lead levels. Let's first examine the similarities and differences between this table's layout and contents and those of Literature Excerpt 10.2 and Literature Excerpt 9.1. Most salient is that the authors present the point estimate and confidence interval, but not the standard error nor t-ratio, within the table. The notes tell us that all significance levels are indicated with superscript letters (a for p < .01 and b for p < .05). Scanning the results, we can see that the only cases which do not have a superscript letter are confidence intervals that include zero, as expected (i.e., second-generational status; Spanish and English home language; educational attainment of 7 to 12 in Model 2; and well drinking water).

Literature Excerpt 10.3

Table 3. Continuous measure of lead among Mexican-American youth 1 to 17 years of age



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