ABSTRACT
<p><b>OBJECTIVE</b>This study was designed to investigate the plasma level of soluble ST2 (sST2) and related influencing factors, and establish its reference value in the healthy community-based population in Beijing area of China.</p><p><b>METHODS</b>We measured plasma sST2 level by enzyme-linked immunosorbent assay between March 2012 and August 2012 in 1 334 healthy subjects in communities, including 597 males and 737 females. Empiric and quantile regression methods were used to determine the reference range of plasma sST2. A multiple linear regression model was established to analyze the factors that might affect the level of plasma sST2.</p><p><b>RESULTS</b>Gender is the most important factor affecting the plasma level of sST2 in healthy people. Plasma level of sST2 is significantly higher in men than in women (P < 0.01). Within each age strata, i.e. < 45, 45-54, 55-64, ≥ 65 years old, the plasma levels of sST2 were significantly higher in men than age-matched female (all P < 0.01). Age, body mass index (BMI), systolic blood pressure, diastolic blood pressure, and smoking did not affect plasma sST2 level. Reference range of sST2 was 5.7-53.5 µg/L for men and 4.4-42.4 µg/L for women (95% nonparametric reference interval). The one-side upper 95th percentile value of sST2 to discriminate the cardiovascular disease from healthy state was 47.2 µg/L for men and 37.2 µg/L for women.</p><p><b>CONCLUSIONS</b>This study established the normal reference range of plasma sST2 in healthy community-based population. The major influencing factor of sST2 level in healthy population is gender.</p>
Subject(s)
Female , Humans , Male , Asian People , Cardiovascular Diseases , China , Hydroxymethylglutaryl-CoA Reductase Inhibitors , Multivariate Analysis , Reference ValuesABSTRACT
<p><b>OBJECTIVE</b>To investigate the plasma level of amino-terminal pro-brain natriuretic peptide (NT-proBNP) and related influencing factors in a community-based healthy population in Beijing area.</p><p><b>METHODS</b>We measured plasma NT-proBNP level by fluoroimmunoassay between March 2012 and July 2012 from 1 034 healthy subjects (including 486 men and 548 women). Empiric method was used to determine the reference value and influencing factors were analyzed.</p><p><b>RESULTS</b>Age and gender are important factors affecting the level of NT-proBNP in healthy subjects. NT-proBNP plasma level is significantly higher in women than in men within each age strata below 75 years old, i.e. < 45, 45-54, 55-64 and 65-74 years old (P = 0.005, 0.001, 0.001, 0.011 respectively), but NT-proBNP plasma level is similar between male and female older than 75 years (P = 0.504). NT-proBNP level also increases with age irrespective of gender. Body mass index (BMI) is another independent influencing factor of NT-proBNP (P < 0.001), while estimated glomerular filtration rate is not influencing factor. The reference range of NT-proBNP is < 133 ng/L for men and < 289 ng/L for women aged < 55 years old, < 185 ng/L for men and < 333 ng/L for women aged between 55 and 64 years old, and < 465 ng/L for men and < 378 ng/L for women aged ≥ 75 years old.</p><p><b>CONCLUSION</b>The major influencing factors of NT-proBNP level in the healthy population are age, gender and BMI. It essential to establish normal reference range of NT-proBNP according to these factors for Chinese population.</p>