• measure Urinary osmolality

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
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    Urinary osmolality was measured with a density test (specific gravity) using the Atago refractometer PAL-10S BLT/A+W (Atago, Tokyo, Japan). The refractive index is a ratio of the velocity of light in air to the velocity of light in solution, which is directly proportional to the number of dissolved solids in urine.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Buccal swab

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_BS3 YC_DSC YE_FITNSS YE_ATTEF1 YE_ATTEF2 YE_ATTEF3 YC_ADHMRI YE_COG18
     
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    Buccal swabs are collections of buccal cell scrapings obtained by rubbing buds along the inside of the mouth.
    Created October 17, 2024 • Updated October 20, 2024

  • measure LC-MS amines

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
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    Liquid chromatography mass spectrometry (LC-MS) platform targeting amines.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Neuropeptides

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
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    Neuropeptides, including Substance P, Beta-endorphin, Dynorphin A, neurotensin, and Leu-enkaphalin, were measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
    Created October 17, 2024 • Updated October 20, 2024

  • measure NMR metabolomics

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YE_COG18
     
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    Untargeted proton nuclear magnetic resonance (1H-NMR) metabolomics platform.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Genotyping (array)

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_BS3 YC_DSC YE_FITNSS YC_ADHMRI YE_COG18
     
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    Assessment of single nucleotide polymorphisms (SNPs) as obtained through genotyping arrays.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Skinfold thickness

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YE_COG18
     
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    Skinfold thickness is an assessment of body fat which can noninvasively and reliably be measured at various sites of the body using a skinfold caliper. Based on measurements at multiple sites of the body, the total body fat and contribution of fat to the body mass can be estimated.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Heart beat perception

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Behavioral/cognitive task
    Available measurements:
    Young Netherlands Twin Register  YE_ATTEF3
     
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    In Heart beat perception, participants were asked to judge their own heart rate by introspective visceral awareness, i.e. without palpitating the arterial pulse signal at wrist or neck. They judged their mean heart rate per minute over three short periods (25, 35 and 45 seconds).
    Created October 17, 2024 • Updated October 20, 2024

  • measure LC-MS steroid hormones

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB2 YC_ACTION - BB3 YC_BS1
     
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    Liquid chromatography mass spectrometry (LC-MS) platform targeting steroid hormones.
    Created October 17, 2024 • Updated October 20, 2024

  • measure VU University Ambulatory Monitoring System (VU-AMS)

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YE_FITNSS YE_ATTEF3 YE_COG18
     
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    The VU University Ambulatory Monitoring System (VU-AMS) enables non-invasive ambulatory measurement of the autonomic nervous system for research purposes and can be used to measure: Heart Rate/Inter beat Interval (IBI), Heart Rate Variability (SDNN, RMSSD, IBI power spectrum: HF, LF), Respiratory Sinus Arrhythmia (RSA), Pre-Ejection Period (PEP), Left...
    Created October 17, 2024 • Updated October 20, 2024

  • measure GC-MS organic acids

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3
     
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    Gas chromatography mass spectrometry (GC-MS) platform targeting organic acids.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Saliva sample

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_BS1 YC_BS2 YC_BS3 YE_ATTEF2 YE_COG12 YE_COG18
     
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    Saliva was collected using a cotton swab or a collection device, such as a tube or container (passive drool).
    Created October 17, 2024 • Updated October 20, 2024

  • measure Steroid hormones

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_BS1 YC_BS2 YC_BS3 YE_ATTEF2 YE_COG12 YE_COG18
     
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    Steroid hormones, for instance Testosterone, Estrogen, Dehydroepiandrosterone (DHEA), and Cortisol, measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
    Created October 17, 2024 • Updated October 20, 2024

  • measure Functional Magnetic Resonance Imaging (fMRI)

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    MRI
    Available measurements:
    Young Netherlands Twin Register  YC_BS2 YC_BS3 YC_ADHMRI
     
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    Functional magnetic resonance imaging (MRI) is a non-invasive technique for examining brain activity. It captures ongoing functional connectivity patterns within the brain, either spontaneously (at rest), or during a specific task.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Liver enzymes

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_BS3
     
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    Liver enzymes, for instance Albumin, Jodide, Aspartaat Aminotransferase (ASAT), and Alanine Transaminase (ALAT), measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
    Created October 17, 2024 • Updated October 20, 2024

  • measure Peptide hormones

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION BB1_1 YC_ACTION BB1_2 YC_BS1 YC_BS2 YC_BS3
     
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    years
    Peptide hormones, for instance Adrenocorticotropic Hormone (ACTH, pituitary hormone), Alpha-Melanocyte-Stimulating Hormone (α-MSH, Melanocortin), Luteinizing Hormone (LH), Cholecytokinin, and Follicle Stimulating Hormone (FSH), measured with traditional enzymatic tests, such as Enzyme-Linked Immunosorbent Assays (ELISA).
    Created October 17, 2024 • Updated October 20, 2024

  • measure Handgrip

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YE_FITNSS
     
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    Handgrip strength in both hands was measured with a dynamometer (Baseline Digital Smedley Hand dynamometer, Fabrication Enterprises Inc., USA) with one arm at the side of the body and the elbow at a 90 degree angle.
    Created October 17, 2024 • Updated October 20, 2024

  • measure DNA methylation (array)

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_ACTION - BB3
     
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    years
    Assessment of DNA methylation as obtained through DNA methylation arrays.
    Created October 17, 2024 • Updated October 20, 2024

  • measure COSMED

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YE_FITNSS
     
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    years
    COSMED consists of recorded breath-by-breath oxygen uptake (VO2) and carbon dioxide production (VCO2) during exercise measured with a telemetric gas exchange system (Cosmed K4b2, Cosmed Benelux, Nieuwegein, The Netherlands).
    Created October 17, 2024 • Updated October 20, 2024

  • measure GC-MS steroid hormones

    Study:Netherlands Twin Register
    Mode of collection: MeasurementsAndTests    Biological sample/measurement
    Available measurements:
    Young Netherlands Twin Register  YC_BS1 YC_BS2 YC_BS3
     
    0
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    25
    30
    years
    Gas chromatography mass spectrometry (GC-MS) platform targeting steroid hormones.
    Created October 17, 2024 • Updated October 20, 2024
You can also access this registry using the API (see API Docs).