This Article  • References  • Full text PDF  • Send to a friend  • Save in My Folder  • Save to citation manager  • Permissions  Citing Articles  • Contact me when this article is cited  Related Content  • Similar articles in JAMA  Social Bookmarking   What's this?

Robert C. Morrow, MD, MPH
Norfolk, Va

JAMA. 1993;269(6):744.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

To the Editor.

—Rosenblatt et al¹ conclude, as a result of correlational analysis, that the organization, location, and mission of US medical schools are closely related to the production of rural practitioners. These conclusions are strengthened and refined by factor analysis of the matrix of intercorrelations between 10 selected variables that they provide in Table 4 (p 1563).

Three underlying factors account for 66% of the variance of this correlation matrix. Factor analysis is appropriate for this data set since the variables are intercorrelated (Kaiser-Meyer-Olkin measure of sampling adequacy = 0.69; Bartlett test of sphericity,P<.001). The percent of variance accounted for and eigenvalues of the first three factors are 35.8% (3.579), 16% (1.603), and 14.8% (1.48). The fourth factor accounts for less than 10% of the variance and has an eigenvalue less than 1.000. A three-factor model seems appropriate.

The factor loadings (of.6000 or greater) of the study . . . [Full Text PDF of this Article]

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter     What's this?