Metabolic syndrome: comparison of occurrence using three definitions in hypertensive patients.
OBJECTIVE
To compare the frequency of occurrence of metabolic syndrome using three international definitions and to study the distribution of cardiovascular risk factors among newly diagnosed hypertensive Nigerian subjects.


METHODS
Cross sectional study.


METHODS
Cardiology unit of LAUTECH Teaching Hospital, Osogbo, Nigeria.


METHODS
One hundred forty newly diagnosed hypertensive Nigerian subjects, and 70 normotensive controls (age- and sex-matched) were included in this study.


METHODS
Clinical history and relevant laboratory investigations were performed on all study participants. The definition of metabolic syndrome was based on three international definitions: World Health Organization (WHO), International Diabetes Federation (IDF), and National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III). Ethical approval was obtained for the study. Statistical analyses were performed using SPSS 16.0.


RESULTS
There was no difference in age and gender distribution between the hypertensive subjects and controls. (55.14 ± 10.83 years, females 53.6% vs. 54.67 ± 10.89 years, females 52.9% respectively, P>0.05). The frequency of occurrence of metabolic syndrome among hypertensives was 34.5% according to WHO, 35.0% according to NCEP ATP III, and 42.5% according to IDF criteria. Visceral obesity and reduced high-density lipoprotein (HDL) were the other common cardiovascular risk factors among newly diagnosed hypertensive subjects. Female hypertensives had a higher prevalence of visceral obesity and low HDL.


CONCLUSIONS
Frequency of occurrence of metabolic syndrome was similar using the NCEP ATP III and WHO definitions. However, the IDF definition resulted in a higher frequency because of the lower cut-off for waist circumference used for identification of visceral obesity. Metabolic syndrome is present in a significant proportion of newly diagnosed hypertensive subjects. Therefore, appropriate screening and treatment are required.
Akintunde
Adeseye A
AA
Division of Cardiology, Ladoke Akintola University of Technology Teaching Hospital, Osogbo, Nigeria. iakintunde2@yahoo.com
Ayodele
Olugbenga E
OE
Akinwusi
Patience O
PO
Opadijo
George O
GO
D000328:Adult; D000368:Aged; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000145:classification / Q000175:diagnosis* / Q000453:epidemiology*; D008297:Male; D024821:Metabolic Syndrome / Q000175:diagnosis* / Q000453:epidemiology*; D008875:Middle Aged; D009549:Nigeria / Q000453:epidemiology