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Идёт набор NCT02583646

Investigating the Impact of Obesity on Pubertal Development in Girls

— Наблюдательное Obesity Puberty Normal Physiology

Ориентир для пациента и семьи

Простыми словами

Автоматическая сводка по структурированным данным реестра. Она помогает сориентироваться, но не заменяет официальный протокол или оценку врача.

Что изучают
Это наблюдательное исследование: исследуемое лечение участникам по протоколу не назначают.
Кому может быть актуально
Состояния в реестре: Obesity, Puberty, Normal Physiology. Базовые параметры: 8 лет — 14 лет · Женщины.
Что важно проверить
Возраст, диагноз и пол — только базовые ориентиры. Предыдущее лечение, анализы и другие обязательные условия указаны ниже в критериях участия.
Где проводится
США
Следующий шаг
Сохраните исследование, покажите его лечащему врачу и уточните актуальный статус у исследовательского центра. Расходы, документы и поездка →

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Обзор

Background: Studies suggest that overweight girls may be developing breast tissue, and therefore starting puberty, earlier than normal weight girls. However, it is hard to distinguish breast tissue from fatty tissue. Researchers think that by using breast ultrasound, among other tests, they can do a better job of telling whether an overweight girl has breast tissue. This will help them understand if overweight girls are truly entering puberty before normal weight girls. Objective: To find out if overweight girls go through puberty earlier than normal weight girls. Eligibility: Healthy girls 8-14 years old who: * Are normal weight or overweight * Have some breast development * Have not started their first period Design: Parents of participants will be screened over the phone. Most participants will have 1 visit. However, they can choose to have multiple visits within 4 weeks. The visit will include: * Physical exam that includes examination of the breasts and genital area * Breast ultrasound: A small hand-held device will be passed back and forth over the chest. It uses sound waves to create a picture of the breast tissue. * Pelvic ultrasound: A small, handheld device will be passed back and forth over the lower belly. It uses sound waves to create a picture of the ovaries. * Urine and blood test * A special x-ray called a DXA to measure the amount of fat in the body: The participant will lie still on a table while the x-ray takes pictures of the body. X-ray of the hand: The picture will tell researchers how mature the participant s bones are. Participants may be asked to come back 6 months later to repeat these tests. ...

Подробное описание

Over the past decade, there has been an alarming trend toward earlier breast development in girls. The contemporaneous obesity epidemic has led to speculation that obesity may be driving early puberty. However, questions remain about the validity of reports of early puberty among obese girls due to the difficulty in distinguishing fatty tissue from breast tissue in this population. The physiological basis for early puberty among obese girls is also unknown. The current proposal aims to investigate pubertal development in pre-menarchal obese compared with normal weight girls using more robust methods such as breast morphological staging via ultrasonography and intensive reproductive axis phenotyping. Study procedures include blood draws, DXA (for body composition), hand x-ray (for bone age), breast and transabdominal (pelvic) ultrasounds, and anthropometrics.

Первичные конечные точки

  • To determine the correlation between Tanner breast staging and breast maturation scores using breast ultrasound in girls [Срок оценки: semiannually]
Вторичные конечные точки (1)
  • To determine the contribution of peripheral aromatization to breast development in obese girls. [Срок оценки: semiannually]

Критерии участия

  • INCLUSION CRITERIA:
  • Girls without a chronic medical condition
  • Normal weight (BMI 5th-85th%) or overweight/obese (BMI > 85th%)
  • 8-14 years old
  • Some breast development
  • Pre-menarchal

Критерии исключения

  • Treated with medications that may affect reproductive hormones (e.g. birth control pills).
  • Pregnancy

During the study, the PI s discretion may be used to determine final eligibility. The PI s discretion may be used at any point in the study (pre-screening, clinical/lab assessments, etc.) to ensure participants are not subjected to unnecessary procedures or visits.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Да

Дизайн исследования

Модель наблюдения
Когортное

Центры проведения

США · 1 центр
  • NIEHS, Research Triangle Park — Research Triangle Park

Публикации

  • Herman-Giddens ME, Kaplowitz PB, Wasserman R. Navigating the recent articles on girls' puberty in Pediatrics: what do we know and where do we go from here? Pediatrics. 2004 Apr;113(4):911-7. doi: 10.1542/peds.113.4.911. No abstract available. PMID 15060243
  • Kaplowitz PB. Link between body fat and the timing of puberty. Pediatrics. 2008 Feb;121 Suppl 3:S208-17. doi: 10.1542/peds.2007-1813F. PMID 18245513
  • Ahmed ML, Ong KK, Dunger DB. Childhood obesity and the timing of puberty. Trends Endocrinol Metab. 2009 Jul;20(5):237-42. doi: 10.1016/j.tem.2009.02.004. Epub 2009 Jun 21. PMID 19541497
  • Ortega MT, McGrath JA, Carlson L, Flores Poccia V, Larson G, Douglas C, Sun BZ, Zhao S, Beery B, Vesper HW, Duke L, Botelho JC, Filie AC, Shaw ND. Longitudinal Investigation of Pubertal Milestones and Hormones as a Function of Body Fat in Girls. J Clin Endocrinol Metab. 2021 May 13;106(6):1668-1683. doi: 10.1210/clinem/dgab092. PMID 33630047

Идентификаторы

NCT: NCT02583646 · 160006 · 16-E-0006

Первоисточники (государственные реестры)

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