Skip to ContentGo to accessibility page

Figure 10.1 Each person’s health is affected by a wide array of factors in their personal and professional lives and in the environments in which they live, work, and play. These workers planting a tree may get good exercise on the job, sometimes they may work in fresh air and sunshine, and they may be able to work and socialize with others on the job, all of which can benefit their health. On the other hand, they may have to work in inclement weather, their work may be physically arduous or even dangerous, they may work by busy roads or highways where they are exposed to loud noise and air pollution, and they may be exposed to other damaging chemicals—for example in fertilizers—all of which can be detrimental to their health. (credit: modification of work “Landscaping Crew” by Lisa Chen/Flickr, CC BY 2.0)

Introduction

Mo is a 55-year-old client who is generally in good health. He works full-time for a landscaping company where he maintains lawns and gardens most of the year and shovels and plows in the winter. Recently, Mo has started thinking about how he can stay healthy as he looks toward retirement over the next decade.

The health of clients like Mo is affected by many factors, not solely by their medications, how often they see health care providers, their physical endurance, their family’s health, their health insurance coverage, their level of education, or any other single factor. Nurses use theoretical perspectives to perform comprehensive assessments and to plan effective care in partnership with clients. Theories provide a means to explain phenomena systematically and to guide thoughts and decision-making processes by fostering an understanding of the causal pathways between factors of health and disease (Eriksson et al., 2018). This chapter describes the many influences on health, socio-ecological models (SEMs), and other theories of health and human behavior. Mo appears throughout the chapter as an example of how an individual’s health may be affected by a wide array of circumstances in their personal and professional lives.

Citation/Attribution
Reuse and redistribution of this content in digital or print format:
  • This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's prior written permission.
  • This book uses the Creative Commons Attribution-NonCommercial-ShareAlike License, which means that you can reuse and modify the material only for noncommercial purposes, must attribute OpenStax, and must distribute any derivative works under the same license.
  • Any commercial printing of this textbook, including using a local or custom printer, must be approved by OpenStax, and proper citation provided.
  • OpenStax-copyrighted images, activities, assessments, and similar components of this book are subject to the same licensing – CC-BY-NC-SA. They can be used for noncommercial purposes with attribution. Commercial use requires permission.
  • Permission requests: Anyone who intends to incorporate this content (including text, images, and other components) into large language models, use it in AI offerings, use it commercially (including in print), and/or has questions about another use case is welcome to complete our reuse request form.
Attribution information
  • If you are redistributing all or part of this book in a noncommercial print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/population-health/pages/1-introduction

  • If you are redistributing all or part of this book in a noncommercial digital format, then for every page that includes OpenStax content, you must license the derivative work under the same CC-BY-NC-SA license as the original, and include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/population-health/pages/1-introduction

Citation information

The information below includes the information needed to generate citations in most major styles (APA, MLA, etc.); you must reformat and organize the information as needed to fit the requirements of the style. Use the information below to generate a citation. We recommend using a citation tool such as this one.

© Apr 23, 2026 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License. The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo, and Rice University name, and Rice University logo trademarks, or wordmarks are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.