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Statistical Models in Toxicology
Mehdi Razzaghi
- 288 pages
- English
- ePUB (mobile friendly)
- Available on iOS & Android
Statistical Models in Toxicology
Mehdi Razzaghi
About This Book
Statistical Models in Toxicology presents an up-to-date and comprehensive account of mathematical statistics problems that occur in toxicology. This is as an exciting time in toxicology because of the attention given by statisticians to the problem of estimating the human health risk for environmental and occupational exposures. The development of modern statistical techniques with solid mathematical foundations in the 20th century and the advent of modern computers in the latter part of the century gave way to development of many statistical models and methods to describe toxicological processes and attempts to solve the associated problems. Not only have the models enjoyed a high level of elegance and sophistication mathematically, they are widely used by industry and government regulatory agencies.
Features:
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- Focuses on describing the statistical models in environmental toxicology that facilitate the assessment of risk mainly in humans. The properties and shortfalls of each model are discussed and its impact in the process of risk assessment is examined.
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- Discusses models that assess the risk of mixtures of chemicals.
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- Presents statistical models that are developed for risk estimation in different aspects of environmental toxicology including cancer and carcinogenic substances.
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- Includes models for developmental and reproductive toxicity risk assessment, risk assessment in continuous outcomes and developmental neurotoxicity.
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- Contains numerous examples and exercises.
Statistical Models in Toxicology introduces a wide variety of statistical models that are currently utilized for dose-response modeling and risk analysis. These models are often developed based on design and regulatory guidelines of toxicological experiments. The book is suitable for practitioners or as use as a textbook for advanced undergraduate or graduate students of mathematics and statistics.
Frequently asked questions
Information
1
Introduction
1.1 Background
1.2 Branches of Toxicology
- a. Aquatic Toxicology: Study of the effect of toxins such as chemical waste or natural material on aquatic organisms.
- b. Chemical Toxicology: Involves the study of the structure and the mechanism of action of chemical toxicants.
- c. Clinical Toxicology: Study concerning how much poison is present in the body as well as problems occurring due to overdose of drugs.
- d. Developmental and Reproductive Toxicology: This branch of toxicology is concerned about the effect of toxins on the offspring when the parent, primarily the mother, is exposed to the toxicant during conception or pregnancy. It also concerns the multigenerational effects of toxic substances.
- e. Ecotoxicology: Study of the effect of toxic substances in the ecosystem.
- f. Environmental Toxicology: Study of the effects of pollutants naturally present in the environment, such as in air, water, and soil, on humans and other living organisms.
- g. Forensic Toxicology: A topic within the general framework of forensic science that deals with the identification and quantification of poison, often leading to the determination of the cause of death.
- h. Industrial Toxicology: Study of the effects of exposure to industrial waste and chemicals released from industries including, but not limited to, soot and other air pollutants.
- i. Molecular Toxicology: This is concerned about the study of the cellular and molecular processes of toxicity.
- j. Regulatory Toxicology: Study of toxicological processes based on the characteristics and guidelines of regulatory agencies.
- k. Neurotoxicology: Study of the effects of toxicants on the brain and the nervous system.
- l. Nutritional Toxicology: Concerned about food additives and nutritional habits, as well as the hazards posed by the way food is prepared, and so on.
- m. Occupational Toxicology: Study of workplace-related health hazards, particularly in the chemical and mining industries.
- n. Veterinary Toxicology: Study of the process of toxicity in animals.
- o. Immunotoxicology: This is the study and analysis of how toxicity can damage the immune system.
- p. Analytical Toxicology: Application of analytical chemistry methods in the quantitative and qualitative evaluation of toxic effects.
- q. Mechanistic Toxicology: Similar to Chemical Toxicology, this study deals with the mechanism of action.
1.3 Basic Elements of Toxicology
- a. Acceptable Daily Intake (ADI): For food additives and drugs.
- b. Benchmark Dose (BMD): A dose of the toxin that produces a predetermined level (e.g. 5%) of change of the adverse effect.
- c. Lowest-Observed-Effect-Level (LOEL): Lowest dose that causes an observable effect.
- d. Lowest-Observed-Adverse-Effect-Level (LOAEL): Lowest dose that causes an observable adverse effect.
- e. Maximum Tolerated Dose (MTD): Used mostly in chronic toxicology and represents highest dose with no health effects.
- f. Median Tolerated Dose (TD 50): Median toxic dose causing toxicity in 50% of exposed individuals.
- g. No Toxic Effect Level (NTEL): Largest dose with no observed effect.
- h. No-Observed-Effect-Level (NOEL): Highest dose with no effect.
- i. No-Observed-Adverse-Effect-Level (NOAEL): Largest experimental dose that produces no undesirable outcome.
- j. Reference Dose (RfD): Daily acceptable dose that produces no risk of adverse effect.
- k. Tolerable Daily (Weekly) Intakes: For contaminants and additives not consumed intentionally.
- l. Reference Intake: Used mainly for nutrients.