• measure Pregnancy Duration and Birth

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YC_DSC YC_ADHMRI YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
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    years
    Pregnancy Duration and Birth assesses the duration of the pregnancy from conception to birth, and the labor process, e.g., were the children born on time, prematurely or late; time between birth of the children; manner of birth (e.g., vaginal, cesarean), position of the children in the uterus before birth; and the course of the delivery.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Supplement use

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YC_ACTION BB2 YC_ACTION - BB3 YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
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    years
    Nutritional supplement use was assessed in mothers during pregnancy, and vitamin supplementation use was assessed for children, including formation regarding type, frequency, and duration of vitamin supplementation.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Contraception Use

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_BS2 YC_BS3 YE_FITNSS YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
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    years
    Contraception use assesses the use of hormonal preparations, such as the contraceptive pill. Questions typically include whether the respondent has used or uses contraceptives prior to pregnancy or at this moment, and in some cases, for how long they have used it, and which type of contraceptive.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Child care

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_2 YS_3 YS_5 YS_7 YS_10 YS_12 YC_BS2 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 5
     
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    years
    Childcare comprises of questions about pre-school, after-school and out-of school care.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Diet during pregnancy

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_TRIP age 1-2
     
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    30
    years
    Diet during pregnancy asks mothers whether they have eaten eggs, dairy products, soy products, fish, and meat during their pregnancy, and whether they followed a vegetarian diet during pregnancy.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Health problems and treatments

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_2 YS_3 YS_5 YS_TRF5 YS_7 YS_TRF7 YS_10 YS_TRF10 YS_12 YS_TRF12 YS_DHBQP YS_DHBQ14 YS_DHBQ16 YS_DHBQ18 YC_ACTION BB2 YC_ACTION - BB3 YC_BS1 YC_BS2 YC_DSC YE_FITNSS YE_ATTEF2 YC_ADHMRI YE_COG12 YE_COG18 YS_TRIP age 1 YS_TRIP age 2 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 4 YS_TRIP age 5 YS_TRIP age 7 YS_TRIP age 10 YS_TRIP age 12
     
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    years
    Health problems and treatments contains questions about health problems, diseases and disorders, including handicaps, treatments (also for mental health problems) and hospitalization.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Breastfeeding

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_2 YS_TRIP age 2 YS_TRIP age 1-2
     
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    30
    years
    Breastfeeding was assessed through the question: Did the twin get breastfeeding?
    Created October 17, 2024 • Updated October 20, 2024

  • measure Pregnancies & miscarriages

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
    0
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    30
    years
    Pregnancies and Miscarriages contains questions about getting pregnant, including the use of hormone preparations or assisted reproductive technologies, and miscarriages.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Surgery and anesthesia

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_2 YS_3 YS_5 YS_7 YS_10 YS_12 YC_BS1 YC_BS2 YE_ATTEF2 YS_TRIP age 2 YS_TRIP age 1-2 YS_TRIP age 3 YS_TRIP age 4 YS_TRIP age 5 YS_TRIP age 7 YS_TRIP age 10 YS_TRIP age 12
     
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    30
    years
    Surgery and anesthesia assesses any experienced surgery, including the insertion of grommets and the removal of tonsils, and general anesthesia.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Birth

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YC_DSC YE_ATTEF2 YC_ADHMRI YE_COG18 YS_TRIP age 1 YS_TRIP age 1-2
     
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    30
    years
    Birth assesses information on pregnancy duration, placenta and chorionicity, mode of delivery, complications around the delivery, and incubator time.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Stressful life events during pregnancy

    Study:Netherlands Twin Register
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Young Netherlands Twin Register  YS_1 YS_TRIP age 1-2
     
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    years
    Stressful life events or stressful periods during pregnancy were reported by participants.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Healthcare Utilization

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  2 months 6 months 3 years 4 years 5-6 years
     
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    years
    Healthcare Utilization assesses the frequency of visits to a doctor (e.g. a general practitioner, peadiatrician, ENT), the reasons for such visits, concrete information about the visit (e.g., name of the hospital and doctor), the frequency of hospitalization, and the use of alternative medicine. It also assesses the growth (length, weight, head...
    Created October 17, 2024 • Updated October 20, 2024

  • measure Medical history - Child

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  2 months 6 months 1 year 2 years 3 years 4 years 5-6 years 9-10 years 13-14 years 17-18 years
     
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    years
    Medical history of the child assesses the general health and medical history of the child. It includes items regarding, distress, respiratory problems (e.g., coughing, sneezing, tightness of chest), pain and perception of pain, abdominal problems (e.g., stomach aches, bowel movements, constipation), teeth problems (e.g., tooth ache, difficulty eating,...
    Created October 17, 2024 • Updated October 20, 2024

  • measure Epilepsy symptoms

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  2 months 6 months 1 year 2 years 3 years 5-6 years
     
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    years
    Epilepsy symptoms assesses the presence of unexpected incidents and attacks in the medical history of the child. Items include epileptic seizures, seizure/febrile convulsion, a breath-holding spell, or lost consciousness.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Lifetime pregnancy history

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  4 years 5-6 years
     
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    years
    Lifetime pregnancy history includes questions about mothers' pregnancies (including possible miscarriages or abortions) during the entire lifetime, assessing the frequency of pregnancies, the course of the pregnancy, pregnancy complications and birth outcomes.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Leiden Inventory of Stability in center care (LIDS)

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  3 years
     
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    years
    The Leiden Inventory of Stability in center care (LIDS) assesses the child’s experience of daily stability in the care setting. The LIDS has a set of 6-point Likert-type items for primary caregivers.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Social Readjusting Rating Scale (SRRS)

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  Mid pregnancy 3 years 5-6 years
     
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    years
    The Social Readjusting Rating Scale (SRRS) assesses the occurrence of stressful life events in the preceding 12 months. Items (yes/no) include 11 events, such as moving house, reduction of income, unemployment, illness or death of family members, divorce, and being a victim of a crime.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Medical history - Fever

    Study:Generation R
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Generation R  6 months 3 years 5-6 years
     
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    years
    The Medical history - Fever questionnaire includes items about the fever history of children, including whether the child had a fever last year, associated symptoms, and doctor visits when the child had the symptoms.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Air pollution

    Study:Generation R
    Mode of collection: Observation
    Available measurements:
    Generation R  Early pregnancy Mid pregnancy Late pregnancy Birth 6 weeks 2 months 3 months 4 months 6 months 1 year 1.5 years 2 years 2.5 years 3 years 4 years 5-6 years 7 years 8 years 9-10 years 11 years 12 years 13-14 years 17-18 years
     
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    years
    For all participants, exposure to air pollutants at each geocoded address was assessed using continuous monitoring data and Geographic Information Systems (GIS)-based modelling techniques, considering the spatial and temporal variation in air pollution.
    Created October 17, 2024 • Updated October 20, 2024

  • measure Pregnancy and Birth

    Study:L-CID
    Mode of collection: SelfAdministeredQuestionnaire
    Available measurements:
    Early Childhood Cohort  ECC - T1

    Middle Childhood Cohort  MCC - T1
     
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    30
    years
    The Pregnancy and Birth questionnaire is a self-developed questionnaire that consists of 13 items about the start of the pregnancy, the pregnancy course (e.g. presence of complications, smoking behavior), and the birth of the twins (e.g., method, date, complications).
    Created October 17, 2024 • Updated October 20, 2024
You can also access this registry using the API (see API Docs).