ORIGINAL ARTICLE
Comparison of three DASH scoring paradigms and prevalent
hypertension among older Hispanics
C Tangney
1
, D Sarkar
1,3
and BA Staffileno
2
Older Hispanics are less likely to be aware of their hypertension or adopt lifestyle modifications for hypertension control than
non-Hispanic whites. Few reports exist concerning Dietary Approaches to Stop Hypertension (DASH) accordance among Hispanics.
This study was designed to: (1) assess accordance to a DASH pattern using three widely used DASH scoring paradigms; and (2)
determine which DASH paradigm was most strongly associated with hypertension in 169 older Hispanics (mean age, 66 years and
73% female). Food frequency questionnaires were used to calculate DASH scores. Logistic regression modeling was performed for
prevalent hypertension with the DASH scores, age, gender and acculturation. Using the Folsom et al. DASH scoring paradigm, 55%
of adults were deemed DASH accordant compared with 17% using Fung et al. scores and 13% using the Toledo et al. Folsom et al.
scores were predictive of prevalent hypertension (odds ratio = 1.35, 95% confidence interval (1.04, 1.77) in this older Hispanic
sample; the remaining two scoring systems were not associated with hypertension in this sample.
Journal of Human Hypertension advance online publication, 28 May 2015; doi:10.1038/jhh.2015.50
INTRODUCTION
Hypertension is a major public health concern in the United States
population. Approximately one out of every three adults or
77.9 million people have high blood pressure (BP).
1
Although the
prevalence of hypertension is lower among Hispanics compared
with Caucasians (22 vs 28%), Hispanics are less likely to be aware
of their hypertension or adopt healthy lifestyle modifications for
controlling their hypertension.
2
The Dietary Approaches to Stop
Hypertension (DASH) eating pattern has been widely promoted
and was developed as a treatment recommended for hyperten-
sion (http://www.nhlbi.nih.gov/health/health-topics/topics/dash).
Lifestyle changes, such as the DASH eating plan along with
weight loss and increased physical activity have been shown to
reduce BP.
3–6
More recently, there is renewed attention to this
pattern with the release of the American Heart Association/
American College of Cardiology guidelines for lifestyle manage-
ment of cardiovascular risk.
7
The DASH eating pattern is high in
fruits and vegetables, moderate in low-fat dairy products, low in
animal protein such as red or processed meats and moderate in
legumes, nuts and seeds.
There are more than 10 different DASH scoring paradigms to
assess accordance or adherence. (Accordance is used
8–10
to assess
the level of conformity to a dietary recommendation/pattern.
Adherence is used compliance to a plan is assessed once the
individual has been counseled on this plan.
5,6
) These paradigms
differ in many ways including, the tools used to collect food
intake, the number of food items that constitute a key food group
to be scored, which food items comprise the food group to be
scored or finally whether intakes of nutrients or food items/groups
(or a combination of both) are the basis for scoring. Although food
frequency questionnaires (FFQ), food records or 24-hour recalls
may all be used to measure usual dietary intakes, the FFQ is
easiest to use with large population samples. Then, the scoring is
standardized for food items on the FFQ. However, if there are no
specific food items on the FFQ to score (such as a whole grain
food item), assumptions are made that could contribute to
misclassification. Scoring paradigms selected include those of
Toledo et al.,
11
Fung et al.
12
and Folsom et al.
13
because: (1) these
investigators predominately used food groups to assess DASH
accordance; (2) FFQs were used to measure usual intake; and
(3) there is evidence for lower risk of hypertension
8,10,11,14
and cardiovascular disease
12,13
among those deemed accordant
to one of these DASH scoring systems. The emphasis on food
items or groups as a feature of the scoring tool was particularly
key because we wanted to identify a scoring approach which
could be applied directly on the completed FFQ, so the clinician
might provide immediate feedback to clients. Scoring intake of
foods or food groups would also be useful for behavioral targets
with clients.
In our previous work
15
we tested a scoring paradigm by
Mellen et al.
10
that is exclusively nutrient-driven. Because many
nutrients are found in the key foods advocated for the DASH food
pattern, it was important to ascertain whether DASH accordance
with more food-based scoring paradigms would also be
associated with hypertension in this sample of adults. Because
we had observed that acculturation scores were predictive of
hypertension status,
15
these were also examined in relation to
DASH scores.
Thus, the overall purpose of this study was to apply three
commonly available DASH scoring paradigms
11–13
to FFQs
completed by a sample of Hispanic individuals currently living in
the Chicago area. The primary objective was to determine
whether DASH scores computed from the three tools were
associated with the presence or absence of hypertension, and
measured systolic BP (SBP) and diastolic BP or (DBP). In addition,
1
Department of Clinical Nutrition, Rush University Medical Center, Chicago, IL, USA and
2
Department of Adult Health and Gerontological Nursing, College of Nursing, Rush
University Medical Center, Chicago, IL, USA. Correspondence: Dr C Tangney, Department of Clinical Nutrition, Rush University Medical Center, 1700 West Van Buren Street, Suite
425, Chicago, IL 60612, USA.
E-mail: ctangney@rush.edu
3
This work is in partial fulfillment of a Master’s of Science degree in Clinical Nutrition.
Received 9 February 2015; revised 4 April 2015; accepted 9 April 2015
Journal of Human Hypertension (2015), 1 – 6
© 2015 Macmillan Publishers Limited All rights reserved 0950-9240/15
www.nature.com/jhh