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Obesity

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The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in...
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Assessment of the Gastrointestinal System II: Health Perception Pattern01:29

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Assessing the gastrointestinal (GI) system is a complex process that begins with collecting subjective data. This data, collected through patient interviews, provides crucial insights into the patient's health history, perception patterns, and lifestyle habits, all contributing significantly to GI health.
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Drug Dosing: Obese Patients01:21

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In the United States, obesity is a prominent concern. It is linked to heightened mortality rates due to increased occurrences of conditions such as hypertension, atherosclerosis, coronary artery disease, and diabetes compared to nonobese individuals. A patient is classified as obese if their actual body weight surpasses the ideal or desirable body weight by 20%, based on Metropolitan Life Insurance Company data. Ideal body weights consider average weights and heights for males and females...
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Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
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Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

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Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
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Lifestyle Factors and Health01:20

Lifestyle Factors and Health

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Lifestyle factors play a critical role in maintaining overall health and preventing chronic diseases. Key elements, such as regular physical activity, a nutritious diet, and abstinence from smoking, can significantly enhance physical, mental, and emotional well-being while reducing the risk of several life-threatening conditions.
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Related Experiment Video

Updated: Apr 21, 2026

A Modified Trier Social Stress Test for Vulnerable Mexican American Adolescents
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NEIGHBORHOOD PERCEPTION AND OBESITY IN AGED MEXICAN AMERICANS.

C Siordia1, J Saenz1

  • 1Community Health and Preventive Medicine, University of Texas Medical Brach, Galveston, Texas, USA.

The Journal of Frailty & Aging
|November 11, 2014
PubMed
Summary

Positive neighborhood perception may increase obesity risk in older Mexican Americans, contrary to expectations. Functional limitations may influence this association, warranting further investigation into neighborhood perception and body weight.

Keywords:
Frailtydisabilitymexican elderlymortality

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Area of Science:

  • Gerontology
  • Public Health
  • Epidemiology

Background:

  • Existing hypotheses suggest positive neighborhood perception correlates with behaviors that moderate body weight.
  • This study investigates the relationship between neighborhood perception and obesity in older adults.

Purpose of the Study:

  • To determine the association between positive neighborhood perception and obesity.
  • To account for frailty and disability in this relationship.

Main Methods:

  • Cross-sectional study using Wave-5 of the Hispanic Established Population for the Epidemiological Study of the Elderly (HEPESE).
  • Included 889 community-dwelling Mexican Americans aged 75-90 in the Southwest US.
  • Logistic regressions analyzed body mass index (BMI), neighborhood perception, functional limitations, and other health variables.

Main Results:

  • The odds of obesity increased with higher positive neighborhood perception.
  • Increased grip strength and presence of basic activities of daily living (ADL) limitations were also associated with higher obesity odds.

Conclusions:

  • Positive neighborhood perception does not consistently correlate with reduced obesity risk in this population.
  • Functional limitations in older adults may mediate the effect of neighborhood perception on BMI.
  • Further research is needed to understand these complex interactions.