Abstract:
OBJECTIVE:Thyroid function parameters have been associated with obesity, but associations with the type of adiposity have not been examined. We used ultrasound (US) to assess regional adiposity and investigated associations of thyroid function with parameters of central obesity. DESIGN:Cross-sectional study. METHODS:A total of 303 apparently healthy individuals (age 42.9+/-8.8, body mass index (BMI) 19.0-43.3, median 26.2 kg/m(2), 181 women) were examined for indices of the metabolic syndrome. BMI, waist and hip circumference, abdominal subcutaneous fat (SF), and preperitoneal fat (PF) layer was estimated. TSH, free thyroxine (fT(4)), triiodothyronine (T(3)), thyroid autoantibodies, insulin, glucose, and lipid levels were measured. Subjects receiving T(4) (9.2%) were excluded. RESULTS:SF and SF/PF ratio were inversely correlated with fT(4) levels (r=-0.169, P=0.023, r=-0.193, P=0.009 respectively). In multivariate analysis, fT(4) was a predictor of SF and SF/PF, independently of age, sex, and smoking. SF correlated with TSH levels (r=0.149, P=0.037). PF and SF were positively associated with T(3) levels (r=0.245, P=0.004 and r=0.189, P=0.019 respectively). T(3) levels were positively associated with BMI (r=0.257, P=0.0004), waist perimeter (r=0.324, P<0.0001), and waist-to-hip ratio (WHR; r=0.363, P<0.0001). The T(3)/fT(4) ratio was positively correlated with SF (r=0.182, P=0.028), WHR (r=0.267, P=0.0003), and BMI (r=0.146, P=0.043). CONCLUSIONS:Increasing SF accumulation as assessed by US is associated with lower fT(4) and higher TSH levels among euthyroid slightly overweight individuals. These associations indicate that subtle variation in thyroid function may participate in regional adiposity.
journal_name
Eur J Endocrinoljournal_title
European journal of endocrinologyauthors
Alevizaki M,Saltiki K,Voidonikola P,Mantzou E,Papamichael C,Stamatelopoulos Kdoi
10.1530/EJE-09-0441subject
Has Abstractpub_date
2009-09-01 00:00:00pages
459-65issue
3eissn
0804-4643issn
1479-683Xpii
161/3/459journal_volume
161pub_type
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