Publications by authors named "Lenna L Liu"

Background/objectives: The waist-to-height ratio (WHtR) estimates cardiometabolic risk in youth without need for growth charts by sex and age. Questions remain about whether waist circumference measured per protocol of the National Health and Nutrition Examination Survey (WHtR) or World Health Organization (WHtR) can better predict blood pressures and lipid parameters in youth.

Participants/methods: WHtR was measured under both anthropometric protocols among participants in the SEARCH Study, who were recently diagnosed with diabetes (ages 5-19 years; N = 2 773).

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Aims: Household food insecurity (FI), i.e., limited availability of nutritionally adequate foods, is associated with poor glycemic control among adults with type 2 diabetes.

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Background: Waist circumference (WC) is commonly measured by either the World Health Organization (WHO) or National Health and Nutrition Examination Survey (NHANES) protocol.

Objective: Compare the associations of WHO . NHANES WC-to-height ratio (WHtR) protocols with cardiometabolic risk factors (CMRFs) in a sample of youth with diabetes.

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The morbidity and mortality associated with preeclampsia is staggering. The physiology of the Page kidney, a condition in which increased intrarenal pressure causes hypertension, appears to provide a unifying framework to explain the complex pathophysiology. Page kidney hypertension is renin-mediated acutely and ischemia-mediated chronically.

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Importance: Despite concern about an "epidemic," there are limited data on trends in prevalence of either type 1 or type 2 diabetes across US race and ethnic groups.

Objective: To estimate changes in the prevalence of type 1 and type 2 diabetes in US youth, by sex, age, and race/ethnicity between 2001 and 2009.

Design, Setting, And Participants: Case patients were ascertained in 4 geographic areas and 1 managed health care plan.

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Sustaining community-based obesity interventions for families represents an ongoing challenge. Many initially grant-funded initiatives lack a sustainable model to continue. After initial grant funding ended, we continued a partnership between Seattle Children's Hospital and YMCA of Greater Seattle to enhance and expand a community-based family obesity program, "ACT! Actively Changing Together.

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Context: Successful obesity intervention efforts depend on effective recruitment and retention, an ongoing challenge for community-based programs.

Objective: We sought to provide insights into the most salient factors affecting family enrollment and retention in community-based programs for overweight youth and their families. We especially sought to understand potentially modifiable program factors affecting participation.

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Objective: To forecast the number of U.S. individuals aged <20 years with type 1 diabetes mellitus (T1DM) or type 2 diabetes mellitus (T2DM) through 2050, accounting for changing demography and diabetes incidence.

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Objectives: (a) To examine the prevalence of obesity across 31 subspecialties in a tertiary care children's hospital and (b) to examine the percentage of obesity-specified diagnosis codes used for obese patient visits.

Methods: We analyzed 48 479 youth aged 2 to 18 years in 31 outpatient subspecialty clinics at Seattle Children's Hospital between 2005 and 2007. Body mass index (BMI) percentiles were determined by age- and gender-adjusted BMI calculated from height/weight obtained at clinic visits.

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Background: Given the prevalence of childhood obesity and the limited support for preventing and managing obesity in primary care settings, the Seattle Children's Hospital's Children's Obesity Action Team has partnered with Steps to Health King County to develop a pediatric obesity quality-improvement project.

Methods: Primary care clinics joined year-long quality-improvement collaboratives to integrate obesity prevention and management into the clinic setting by using the chronic-disease model. Sustainability was enhanced through integration at multiple levels by emphasizing small, consistent behavior changes and self-regulation of eating/feeding practices with children, teenagers, and families; building local community partnerships; and encouraging broader advocacy and policy change.

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Objective: Obesity's association with type 2 diabetes (T2DM) is well established, but is less clear with type 1 diabetes (T1DM). We calculated the prevalence of overweight and obesity among diabetic youth in the USA from a six-center, population-based study of racially and ethnically diverse youth with diabetes, and we compared these rates with estimates among nondiabetic youth.

Design/setting: Diabetic participants were examined in 2001-2004 for the SEARCH for Diabetes in Youth study (SEARCH) and nondiabetic participants were examined during the same years of the National Health and Nutrition Examination Survey (NHANES).

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Objective: Given limited reports on diabetes among U.S. Asian and Pacific Islander youth, we describe the clinical characteristics, incidence, and prevalence of diabetes among Asian, Pacific Islander, and mixed Asian-Pacific Islander youth.

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Context: Data on the incidence of diabetes mellitus (DM) among US youth according to racial/ethnic background and DM type are limited.

Objective: To estimate DM incidence in youth aged younger than 20 years according to race/ethnicity and DM type.

Design, Setting, And Participants: A multiethnic, population-based study (The SEARCH for Diabetes in Youth Study) of 2435 youth with newly diagnosed, nonsecondary DM in 2002 and 2003, ascertained at 10 study locations in the United States, covering a population of more than 10 million person-years.

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Objective: Our goal was to estimate the prevalence of diabetes mellitus in youth <20 years of age in 2001 in the United States, according to age, gender, race/ethnicity, and diabetes type.

Methods: The SEARCH for Diabetes in Youth Study is a 6-center observational study conducting population-based ascertainment of physician-diagnosed diabetes in youth. Census-based denominators for 4 geographically based centers and enrollment data for 2 health plan-based centers were used to calculate prevalence.

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Objective: The purpose of this study was to determine the prevalence and correlates of selected cardiovascular disease (CVD) risk factors among youth aged <20 years with diabetes.

Research Design And Methods: The analysis included 1,083 girls and 1,013 boys examined as part of the SEARCH for Diabetes in Youth study, a multicenter, population-based study of youth 0-19 years of age with diabetes. Diabetes type was determined by a biochemical algorithm based on diabetes antibodies and fasting C-peptide level.

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Respiratory assessment of children with asthma or bronchiolitis is problematic because both the components of the assessment and their relative importance vary among care providers. Use of a systematic standard assessment process and clinical score may reduce interobserver variation. Our objective was to determine observer agreement among physicians (MD), nurses (RN), and respiratory therapists (RT), using a standard respiratory clinical score.

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