Certified Occupational Health Nurse V4.0

See Pricing Free Quiz

COHNprep Version 4.0  is an interactive software program consisting of a database of questions, answers, and explanations that together comprise a system for exam preparation.   The Program contains two modules “Study Session” and “Practice Test” to help users most efficiently focus their exam preparation.  Learn more about our program features:

Why Datachem

Take A Tour

Program licenses are available in 90 – 365 day options.   You select the time period that works best with your study plans.  Pricing and time options can be reviewed by clicking the “Order Now” or “See Pricing” button

We are confident you will find our exam preparation materials are a valuable aid in studying for your certification, and we back that up with a money back or no-charge extra time offer.



Certification Exam:  The software is designed to prepare the user for the Certified Occupational Health Nurse Certification exam. The COHN exam is offered by the American Board for Occupation Health Nurses (ABOHN).

Program Name:   COHNprep Version 4.0

Year Created:  2000

Last modified:   February 2019

Upcoming Modifications:  N/A

Number of Questions:    1166

Exam Prep Outline:

COHNprep Version 4.0 is an interactive software program consisting of a database of questions, answers, and explanations that together comprise a system for exam preparation.  The database has over 1150 questions in 4 main subject areas. These areas are as follows:


  • Clinician
  • Coordinator
  • Advisor
  • Case Manager



Author:  Cynthia R. Lawson, RN

Cynthia Rosa Lawson is the author/editor of COHNprep and COHN-Sprep programs.  Active in the field of Environmental Safety and Health for more than 40 years, she has been responsible for the design and implementation of risk management and in-house medical programs for both national and international corporations. She has lectured extensively on these topics to professional and trade organizations.

The success of these programs has been recognized with numerous awards from the National Safety Council, the Connecticut Division of Worker’s Education and Connecticut Business and Industry Association.  

Ms. Lawson has served as Chairperson of the CT Safety Advisory Board, has held several board positions with the Connecticut Occupational Health Nurses Association and served on the Connecticut Workers Compensation Advisory Board.

She earned a Bachelors Degree in Nursing from Western Connecticut State University, and Master of Science Degree in Occupational Safety and Health Management from the University of New Haven.  Ms. Lawson is a Registered Nurse and a Certified Occupational Health Nurse Specialist (Retired).


See Pricing Free Quiz