Lisa J. Harnack

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BACKGROUND Dietary flavonoids may have beneficial cardiovascular effects in human populations, but epidemiologic study results have not been conclusive. OBJECTIVE We used flavonoid food composition data from 3 recently available US Department of Agriculture databases to improve estimates of dietary flavonoid intake and to evaluate the association between(More)
OBJECTIVE To determine whether carbonated soft drink consumption is associated with consumption of milk, fruit juice, and the nutrients concentrated in these beverages. DESIGN Data collected as part of the 1994 Continuing Survey of Food Intakes by Individuals were analyzed. Information on food and nutrient intake was derived from 2 days of dietary recall(More)
BACKGROUND Although point-of-purchase calorie labeling at restaurants has been proposed as a strategy for improving consumer food choices, a limited number of studies have evaluated this approach. Likewise, little research has been conducted to evaluate the influence of value size pricing on restaurant meal choices. METHODS To examine the effect of(More)
OBJECTIVE To identify factors associated with nonalcoholic carbonated beverage (soft drink) consumption in children. DESIGN Mail-in surveys collected by Dragonfly, a children's educational magazine distributed nationally to elementary and middle schools, were analyzed. The survey included questions about frequency of soft drink consumption and factors(More)
OBJECTIVE The results of an 18-month worksite intervention to prevent obesity among metropolitan transit workers are reported. METHODS Four garages in a major metropolitan area were randomized to intervention or control groups. Data were collected during the fall of 2005 prior to the start of the intervention and during the fall of 2007, after the(More)
OBJECTIVE: To examine demographic, behavioral and dietary correlates of frequency of fast food restaurant use in a community-based sample of 891 adult women.DESIGN: A survey was administered at baseline and 3 y later as part of a randomized, prospective intervention trial on weight gain prevention.SUBJECTS: Women (n=891) aged 20–45 y who enrolled in the(More)
Heterocyclic amines (HCAs), and polycyclic aromatic hydrocarbons (PAHs), formed in temperature and time-dependent manners during cooking of meat, may increase the risk of certain cancers. As these compounds could be carcinogenic for the pancreas, we assessed meat intake, preparation methods, and doneness preferences as risk factors for exocrine pancreatic(More)
CONTEXT Inconsistent findings from observational studies have continued the controversy over the effects of dietary fiber on colorectal cancer. OBJECTIVE To evaluate the association between dietary fiber intake and risk of colorectal cancer. DESIGN, SETTING, AND PARTICIPANTS From 13 prospective cohort studies included in the Pooling Project of(More)
BACKGROUND Cigarette smoking is an established risk factor for colorectal cancer. Because colorectal carcinogenesis is a heterogeneous process, we investigated whether cigarette smoking is differentially associated with molecularly defined subtypes of colorectal cancer. METHODS We evaluated associations between smoking and incident colorectal cancer,(More)
Catechins, one of the major groups of flavonoids, are bioactive compounds present in a variety of plant foods and beverages. Experimental data suggest that they might prevent chronic diseases in humans. We studied whether the intake of catechins was inversely associated with the risk of coronary heart disease death in a prospective study of postmenopausal(More)