Among the study population, 146 (27

Among the study population, 146 (27.4%) men and 323 (35.9%) women had thyroid cysts. Table 1 Characteristics of the study populace anti-thyroid peroxidase antibody, thyroid-stimulating hormone, free triiodothyronine, free thyroxine, body mass index, systolic blood pressure, triglycerides, high-density lipoprotein cholesterol No. between TPO-Ab and thyroid cysts, Esaxerenone we conducted a cross-sectional study of 1432 Japanese with normal thyroid function [i.e., normal range of free triiodothyronine (free T3) and free thyroxine (free T4)] between the ages of 40 and 74?years, who participated in an annual health check-up. Results In men, the statistical power did not reach a statistical significance value. Additionally, subjects with TPO-Ab showed lower odds ratios (ORs) of thyroid cysts than those without TPO-Ab. In women, subjects with TPO-Ab showed significantly lower ORs of thyroid cysts than those without TPO-Ab. The fully adjusted ORs were 0.68 (0.40, 1.18) for men and 0.40 (0.27, 0.60) for women. When evaluating the association between logarithmic values of TPO-Ab titer and thyroid cysts in both men and women, a notable inverse correlation was observed. The fully adjusted ORs were 0.68 (0.50, 0.92) for men and 0.68 (0.57, 0.81) for women. Conclusion TPO-Ab titer revealed to be inversely associated with thyroid cysts among Japanese with normal thyroid function. The presence of a thyroid cyst could indicate a lower risk of having TPO-Ab among the general population with normal thyroid function. = 60), without thyroid function data such as TSH, free T3, and free T4 (= 17), and subjects with an abnormal T3 (normal range 2.1C4.1?pg/mL) and T4 (normal range 1.0C1.7?ng/dL) range were excluded (= 77). Additionally, subjects without body mass index (BMI) data (= 1), blood pressure data (= 1), TPO-Ab data (= 294), and women without menopause data (= 1) were excluded. The remaining subjects, comprising 1432 with a mean age of 60.9?years (standard deviation (SD) 9.0; range 40C74) were enrolled in the study. Data collection and laboratory measurements A trained interviewer obtained information on clinical characteristics. Bodyweight and height were measured with an automatic body composition analyzer (BF-220; Tanita, Tokyo, Japan) and BMI (kg/m2) was calculated. Systolic blood pressure (SBP) was recorded Esaxerenone at rest. A fasting blood sample was collected. TSH, free T3, free T4, and TPO-Ab were measured by standard procedures at the LSI Medience Corporation (Tokyo, Japan). HbA1c, triglycerides (TG), and high-density lipoprotein cholesterol (HDLc) were also measured using standard procedures at SRL, Inc. (Tokyo, Japan). Detecting thyroid cysts are identified by experienced professionals using a LOGIQ Book XP with a 10-MHz transducer (GE Healthcare, Milwaukee, WI, USA). A thyroid cyst (maximum diameter 2.0?mm) without a sound component was defined as a thyroid cyst for this study. The positive status of TPO-Ab (+) Esaxerenone was defined at and above 16?IU/mL. Statistical analysis Characteristics of the study populace were expressed as mean SD except for anti-hypertensive medication use, menopause, TPO-Ab, and TSH. The status of anti-hypertensive medication use and menopause was expressed as a percent value. Since TPO-Ab and TSH showed a skewed distribution, the characteristics of this study populace were expressed as median [the first quartile, the third quartile]. The differences among free T3, free T4, and TSH regarding the status of TPO-Ab were calculated. Significant differences by the status of TPO-Ab were evaluated using analysis of variance (ANOVA). Logistic regression models were used to calculate odds ratios (ORs) and 95% confidence intervals (CIs) to determine the association between TPO-Ab and thyroid cysts. Three adjustment models were used. The first model was adjusted only for sex and age (model 1); the second model (model 2) further included the potential confounding factors that were directly associated with thyroid function, namely TSH (IU/mL), free T3 Rabbit Polyclonal to NT (pg/mL), and free T4 (ng/dL). The last model (model 3) was further adjusted for potential confounding factors that were indirectly associated with thyroid function; such as, BMI (kg/m2), SBP (mmHg), anti-hypertensive medication use (yes/no), HbA1c (%), TG (mg/dL), HDLc (mg/dL), and for women menopause (yes/no). We also stratified the participant by the status of gender. All statistical analysis was performed with the SAS system for Windows (version 9.4: SAS Inc., Cary, NC, USA). Values of 0.05 were regarded as statistically significant. Results Table ?Table11 shows the characteristics of the study populace. Among the study populace, 146 (27.4%) men and 323 (35.9%) women had thyroid cysts. Table 1 Characteristics of the study populace anti-thyroid peroxidase antibody, thyroid-stimulating hormone, free triiodothyronine, free thyroxine, body mass index, systolic blood pressure, triglycerides, high-density lipoprotein cholesterol No. of case is the number of participants with thyroid cyst. Values are mean standard deviation *1Values are median [the first quartile, third quartile]. Normal range of measurements are ( ) The values of the thyroid-related hormone by TPO-Ab status are shown in Table ?Table2.2. TPO-Ab (+) showed significantly higher values of TSH than TPO-Ab (C). However, no significant differences between TPO-Ab (+) and TPO-Ab (C) were observed for free T3 and free T4. Table 2 Thyroid-related hormone by anti-thyroid peroxidase antibody (TPO-Ab) thyroid-stimulating hormone, free triiodothyronine, free thyroxine Values are mean standard deviation *1Values are median [the first.