If you are fuzzy about the details of your topic (which pathogens or other agents cause food safety concerns?), check an encyclopedia. Health-related encyclopedias often include a discussion of risk factors. Some* of the encylopedias listed below are searchable through the online Gale Virtual Reference Library
Encyclopedia of Public Health. Reference Room RA423 .E53 2002 (4 vols)
*Encyclopedia of Health & Behavior. Reference Room R726.5 .E53 2004 (2 vols)
Encyclopedia of Primary Prevention and Health Promotion. Stacks RA427.8 .E53 2003
*Gale Encyclopedia of Mental Disorders. Reference Room RC437 .G35 2003 (2 vols)
*Gale Encyclopedia of Medicine. Reference Room RC41 .G35 2002 (5 vols)
Encyclopedia of Food Science and Nutrition. Reference Room TX349 .E47 2003 (10 vols)
Encyclopedia of Family Life. Reference Room HQ534 .E53 1999 (5 vols)
Medical Library Association Encyclopedic Guide to Searching and Finding Health Information on the Web. Reference Room R859.7.I58 M436 2004 (3 vols)
Healthy People 2010: The Healthy People 2010 document lists Objectives for Improving Health. These objectives include trends, risk factors (not always clearly marked in a separate section), and national statistics.
Table of contents: "Objectives for Improving Health" begin in Volume I and run continue through Volume II.
Healthy Carolinians: Includes a guide to North Carolina 2010 Health Objectives. These Objectives include background information, disparities, risk factors, and state-level statistics.
CINAHL (EBSCO): Search for articles discussing your topic and risk factors. For example:
Finding articles in scholarly journals: Scholarly journals vs. popular publications, using search connectors, using Journal Finder. For animated introductions to the research process, using CINAHL and Journal Finder, check the Nursing and Health Resources Tutorial.
PHID Tutorial: Includes a great overview of statistics, from Internet portals to federal and state data sets.