Biochemical reference intervals for sex hormones with a new AutoDelfia method in aged men

2007 ◽  
Vol 45 (2) ◽  
Author(s):  
Seija Eskelinen ◽  
Tero Vahlberg ◽  
Raimo Isoaho ◽  
Sirkka-Liisa Kivelä ◽  
Kerttu Irjala
Keyword(s):  
Sex Hormones ◽  
Follicle Stimulating Hormone ◽  
Age Groups ◽  
Free Testosterone ◽  
Reference Population ◽  
Reference Intervals ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Reference Ranges ◽  
Hormone Binding

AbstractOur aim was to establish sex hormone reference intervals measured with a new AutoDelfia immunoassay method for aged men free of medication and/or conditions known to influence sex hormone levels.The reference population consisted of 466 individuals between 64 and 97 years (mean 72 years) and a mean body mass index (BMI) of 26.9 kg/mBecause age correlated significantly with most sex hormones studied, we calculated reference intervals for three age groups (64–69, 70–74 and ≥75 years). In clinical practice, single ranges can be used for men aged 64 years or over for testosterone, estradiol and follicle-stimulating hormone (FSH) with the AutoDelfia method. For free testosterone and luteinizing hormone (LH), separate reference intervals should be used for men aged 64–74 years and those aged 75 years or over. For sex hormone-binding globulin, two separate reference intervals by age (64–69 and ≥70 years) are also needed for aged men. LH and FSH reference ranges should be judged with caution, because they may be too high due to cases of subclinical hypogonadism included in the reference population.Clin Chem Lab Med 2007;45:249–53.

Ramifications of variability in sex hormone-binding globulin measurement by different immunoassays on the calculation of free testosterone

2019 ◽  
Vol 57 (1) ◽  
pp. 88-94
Author(s):  
Joanne Adaway ◽  
Brian Keevil ◽  
Annmarie Miller ◽  
Phillip J Monaghan ◽  
Nicola Merrett ◽  
...  
Keyword(s):  
Free Testosterone ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Specific Reference ◽  
Reference Ranges ◽  
Hormone Binding ◽  
Serum Samples ◽  
Appropriate Treatment ◽  
Result Interpretation ◽  
Abbott Architect

Objective Sex hormone-binding globulin (SHBG) is a glycoprotein which binds hormones such as testosterone. Around 97% of circulating testosterone is bound to SHBG or albumin and is therefore biologically unavailable; 2–3% of testosterone is free. Free testosterone is very technically challenging to quantify; in order to circumvent this problem, equations using testosterone and SHBG are used to estimate free testosterone. We decided to determine the effect of using different SHBG immunoassays on calculated free testosterone results. Design Anonymized surplus serum samples were analysed for SHBG on four different immunoassay platforms (Abbott Architect, Roche, Beckman and Siemens). The SHBG results were used to generate a Vermeulen calculated free testosterone. Results Beckman Access and Siemens Centaur both gave results close to the overall mean. Roche gave the highest SHBG concentrations with Abbott Architect producing the lowest results. Abbott Architect gave the highest calculated free testosterone results, followed by Beckman. Roche gave the lowest results. Sixty-five per cent of male samples had low calculated free testosterone and 27.5% of the females had high calculated free testosterone using the SHBG from the Abbott assay compared with 69% low male calculated free testosterone and 20% high female calculated free testosterone with the Roche assay. Conclusion Our results have shown significant differences in SHBG results produced by different analysers and subsequently the calculated free testosterone, which may affect result interpretation if method-specific reference ranges for calculated free testosterone are not used. Care should be taken to ensure reference ranges are appropriate for the analyser used to avoid misdiagnosis of hypo or hyperandrogenism, and ensure patients get the most appropriate treatment.

scholarly journals Verification of the Canadian Laboratory Initiative on Paediatric Reference Intervals (CALIPER) reference values in Croatian children and adolescents

2020 ◽  
Vol 30 (2) ◽  
pp. 307-314
Author(s):  
Renata Zrinski Topić ◽  
Jasna Leniček Krleža
Keyword(s):  
Children And Adolescents ◽  
Follicle Stimulating Hormone ◽  
Reference Interval ◽  
Reference Intervals ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Total Testosterone ◽  
Healthy Children ◽  
Hormone Binding ◽  
Stimulating Hormone

Introduction: The aim of this study was to examine whether the Canadian Laboratory Initiative on Paediatric Reference Intervals (CALIPER) could be applied to Croatian children and adolescents. Materials and methods: A total of 295 outpatient healthy children and adolescents of age 1 to 18 were selected using the direct a posteriori sampling method. According to current guidelines, 20 samples were tested for each of a total of 51 reference intervals for ferritin, cortisol, dehydroepiandrosterone sulfate, follicle stimulating hormone, lutein stimulating hormone, prolactin, progesterone, sex hormone binding globulin, thyroid stimulating hormone, total testosterone, total thyroxine and total triiodothyronine. Serum samples were analysed on the Beckman Coulter DxI600 immunoassay analyser by chemiluminescence immunoassay method. A reference interval was adopted if < 10% of the results fall outside CALIPER reference interval range. For analytes in which this criterion is not met in the first set of samples, a new set of 20 samples were collected. Results: After the first set of measurements, 96% of all tested reference intervals were adopted for use. The additional sets of 20 reference subjects were tested for only two reference intervals; follicle stimulating hormone for female aged 1 to 9 years, and irrespective of the gender, sex hormone binding globulin for children aged 8 to 11 years. All results of additional samples were within the specified interval limits. Conclusions: CALIPER reference intervals for ferritin and 11 hormones defined for Beckman Coulter DxI600 immunoassay analyser can be implemented into the Croatian laboratories and clinical practice.

Sex-specific young adult reference ranges for sex hormone concentrations measured on the Siemens ADVIA Centaur/Geschlechtsspezifische Referenzbereiche für Sexualhormonkonzentrationen junger Erwachsener gemessen auf dem Siemens ADVIA Centaur

2012 ◽  
Vol 36 (1) ◽  
Author(s):  
Anke Hannemann ◽  
Nele Friedrich ◽  
Christin Spielhagen ◽  
Matthias Nauck ◽  
Robin Haring
Keyword(s):  
Regression Models ◽  
Free Testosterone ◽  
Dehydroepiandrosterone Sulfate ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Total Testosterone ◽  
Reference Ranges ◽  
Serum Concentrations ◽  
Hormone Binding ◽  
Free Androgen Index

AbstractThe present study aims to determine reference ranges for sex hormone concentrations measured on the Siemens ADVIA CentaurThe study sample consisted of 1638 individuals (814 men and 824 women) aged 18–60 years with measured serum concentrations of total testosterone (TT), sex hormone-binding globulin (SHBG), and dehydroepiandrosterone sulfate (DHEAS). Values for free testosterone (free T) and free androgen index (FAI) were calculated. Sex- and age-specific (18 to <25, 25 to <35, 35 to <45, and ≥45 years) reference ranges for these sex hormones were determined using quantile regression models for each sex hormone separately.Sex hormone reference ranges were determined across each single year of age separately for men (TT: 5.60–29.58 nmol/L, SHBG: 17.65–73.64 nmol/L, DHEAS: 0.96–4.43 mg/L, free T: 0.10–0.51 nmol/L, and FAI: 15.04–70.37 nmol/L) and women (TT: 0.77–2.85 nmol/L, SHBG: 27.06–262.76 nmol/L, DHEAS: 0.50–3.15 mg/L, free T: 0.005–0.05 nmol/L, and FAI: 0.51–8.30 nmol/L), respectively.

The Relationship between Sex Hormones, Sex Hormone Binding Globulin and Peripheral Artery Disease in Older Persons

2011 ◽  
pp. P1-338-P1-338
Author(s):  
Chiara Cattabiani ◽  
Gianpaolo Ceda ◽  
Fulvio Lauretani ◽  
Stefania Bandinelli ◽  
Giulia Schiavi ◽  
...  
Keyword(s):  
Sex Hormones ◽  
Peripheral Artery Disease ◽  
Older Persons ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Hormone Binding ◽  
Peripheral Artery ◽  
Artery Disease ◽  
The Relationship

scholarly journals Alcohol Consumption in Relation to Plasma Sex Hormones, Prolactin, and Sex Hormone–Binding Globulin in Premenopausal Women

2014 ◽  
Vol 23 (12) ◽  
pp. 2943-2953 ◽  
Author(s):  
Kelly A. Hirko ◽  
Donna Spiegelman ◽  
Walter C. Willett ◽  
Susan E. Hankinson ◽  
A. Heather Eliassen
Keyword(s):  
Alcohol Consumption ◽  
Sex Hormones ◽  
Premenopausal Women ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Hormone Binding

scholarly journals The Effect of Metformin vs Placebo on Sex Hormones in Canadian Cancer Trials Group MA.32

2020 ◽  
Author(s):  
Isabel Pimentel ◽  
Bingshu E Chen ◽  
Ana Elisa Lohmann ◽  
Marguerite Ennis ◽  
Jennifer Ligibel ◽  
...  
Keyword(s):  
Sex Hormones ◽  
Sex Hormone ◽  
Sex Hormone Binding Globulin ◽  
Phase Iii ◽  
Endocrine Treatment ◽  
Hormone Binding ◽  
Bioavailable Testosterone ◽  
Improved Outcomes ◽  
Neo Adjuvant Chemotherapy ◽  
Estradiol Levels

Abstract Background Metformin has been associated with lower breast cancer (BC) risk and improved outcomes in observational studies. Multiple biologic mechanisms have been proposed, including a recent report of altered sex hormones. We evaluated the effect of metformin on sex hormones in MA.32, a phase III trial of nondiabetic BC subjects who were randomly assigned to metformin or placebo. Methods We studied the subgroup of postmenopausal hormone receptor-negative BC subjects not receiving endocrine treatment who provided fasting blood at baseline and at 6 months after being randomly assigned. Sex hormone-binding globulin, bioavailable testosterone, and estradiol levels were assayed using electrochemiluminescence immunoassay. Change from baseline to 6 months between study arms was compared using Wilcoxon sum rank tests and regression models. Results 312 women were eligible (141 metformin vs 171 placebo); the majority of subjects in each arm had T1/2, N0, HER2-negative BC and had received (neo)adjuvant chemotherapy. Mean age was 58.1 (SD=6.9) vs 57.5 (SD=7.9) years, mean body mass index (BMI) was 27.3 (SD=5.5) vs 28.9 (SD=6.4) kg/m2 for metformin vs placebo, respectively. Median estradiol decreased between baseline and 6 months on metformin vs placebo (−5.7 vs 0 pmol/L; P &lt; .001) in univariable analysis and after controlling for baseline BMI and BMI change (P &lt; .001). There was no change in sex hormone-binding globulin or bioavailable testosterone. Conclusion Metformin lowered estradiol levels, independent of BMI. This observation suggests a new metformin effect that has potential relevance to estrogen sensitive cancers.

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