Journal List > J Korean Soc Hypertens > v.17(3) > 1089772

Lee, Kim, Sung, Cho, Hyun, Park, Kim, Lee, Kim, and Lee: Influence of Metabolic Syndrome on Hypertension-related Target Organ Damage: Diagnosis of Metabolic Syndrome Is Still Necessary

ABSTRACT

Background:

The value of metabolic syndrome (MetS) evaluation in predicting cardiovascular disease is recently criticized. We investigated, in hypertensive patients without diabetes mellitus, the influence of MetS on the target organ damage.

Methods:

Data from the fourth Korean National Health and Nutrition Examination Survey performed in 2008 were analyzed. Metabolic syndrome is defined by the 2001 National Cholesterol Education Program-Third Adult Treatment Panel guideline. The category of hypertension is defined following the seventh report of the Joint National Commitee-7 guideline.

Results:

The prevalence of target organ damage (TOD), defined as history of myocardial infarction/angina/stroke/chronic renal disease as well as the presence of macroalbuminuria, was increased according to blood pressure; 8.5% in the population of normal blood pressure, 12.5% in those of prehypertensive range, and 20.5% in hypertensive population. Hypertensive population associated with MetS showed greater prevalence of TOD than those without MetS even excluding diabetic population. The presence of MetS in hypertensive population showed 2.2 fold increased risk for TOD. Any single parameter of MetS diagnostic criteria as well as obesity did not show the comparable range of risk prediction as MetS.

Conclusions:

These results indicate a strong relationship of Mets with TOD in hypertensive population. Evaluating the metabolic components in hypertensive population is necessary in establishing management strategies for overall risk.

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Fig. 1.
Prevalence of target organ damage according to blood pressure category. TOD, target organ damage; CAD, Coronary artery disease.
jksh-17-125f1.tif
Fig. 2.
The prevalence of target organ damage according to co-morbid cardiovascular risk factor in hypertensive population. IFG, Impaired fasting glucose.
jksh-17-125f2.tif
Fig. 3.
Area under curve of each diagnostic criteria of metabolic syndrome from receiver-operating characteristic analysis in Korean hypertensive population with metabolic syndrome. BMI, body mass index; Low HDL, low high density lipoproteinemia; High TG, high triglyceridemia; MetS, metabolic syndrome.
jksh-17-125f3.tif
Table 1.
Baseline characteristics of the enrolled population
Number (%)
Gender (M:F) 1235:1706 (42:58)
Age 50 ± 16
Age decades
20–29 315 (10.7)
30–39 637 (21.7)
40–49 570 (19.4)
50–59 501 (17.0)
60–69 479 (16.3)
70– 436 (14.8)
Body mass index 23.7 ± 3.3
1st quartile value 21.4
2nd quartile value 23.6
3rd quartile value 25.7
Blood pressure (mm Hg) 117.7 ± 17.5/75.7 ± 10.0
Normal range 1409 (47.9)
Prehypertensive range 742 (25.2)
Hypertensive range 787 (26.8)
Insulin resistance status
Normal range 2157 (73.4)
Impaired fasting glucose 479 (16.3)
Diabetes mellitus 302 (10.3)

Values are presented as mean±standard deviation or number (%).

Table 2.
Age-/Sex-adjusted, weighted prevalence of target organ damage according to cardiovascular risk factor
Condition Target organ damage prevalence (%)
Absence Presence
Diabetes Mellitus 10.9 26.1
Hypertension 9.8 20.4
Metabolic syndrome 9.6 19
Smoking 10.7 13.7
Alcohol 12.1 13.3
Obesity 10.8 15
Table 3.
Cross-sectional association of target organ damage associated with specific components of metabolic syndrome in hypertensive population
Odds rations Confidence intervals p-value
Obesity 1.336 1.333–1.339 < 0.001
High glucose 1.530 1.526–1.533 < 0.001
High TG 0.959 0.957–0.961 < 0.001
WC 1.487 1.484–1.491 < 0.001
Low HDL 1.274 1.271–1.276 < 0.001
WC + TG 1.422 1.418–1.426 < 0.001
WC + TG + HDL 1.415 1.411–1.419 < 0.001
MetS 1.827 1.823–1.831 < 0.001

High TG, high triglyceridemia; WC, waist circumference: > = 90 cm (male) or > = 85 cm (female); Low HDL: low high density lipoproteinemia; MetS, metabolic syndrome.

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