259989 Psychometric Properties of an Instrument Measuring Patient's Knowledge about Coumadin

Wednesday, October 31, 2012 : 12:50 PM - 1:10 PM

Feleta Wilson, PhD, RN, FAAN , College of Nursing, Wayne State University, Detroit, MI
Thomas Templin, PhD , College of Nursing, Wayne State University, Detroit, MI
Cheryl Nordstrom, PhD , College of Nursing, Wayne State University, Detroit
Jemica Carter, PhD, RN , Department Nursing, John D. Dingel Veteran Administration Medical Center, Detroit, MI
May T. Dobal, PhD, RN , Long Island University - Brooklyn, School of Nursing, Brooklyn, NY
More than 2 million adults are self-managing Oral Anticoagulation Therapy (OAT) which require that patient be actively involved in maintaining the balance between clotting and bleeding. Yet, few instruments are available to measure OAT knowledge. The objectives of this study were to: 1) determine the psychometric properties of the Knowledge Information Profile about Coumadin (KIP-C), 2) measure the literacy levels of patients receiving Coumadin in the urban clinic and, 3) determine how literacy, sociodemographic, and health characteristics relate to knowledge about Coumadin. An exploratory factor analysis of the tetrachoric correlation matrix was performed. A sample of 192 patients participated in the study. Patients taking Coumadin for an average of 4.8 years demonstrated a surprising gap in fundamental health literacy knowledge essential to the safe self management of oral anticoagulation therapy. In terms of the KIP-C, the final model with three factors, 14 items, and one error covariance, had a good fit to the data (chi-square = 90.93, df = 74, p = .09, comparative fit index = .94, and root mean square error of approximation = .035) and all factor loadings were significant (p < .05) using the critical ratio/Wald test. The test-retest correlation for the total scale was .68. Each of the factors was sufficiently distinct that subscale scores were also deemed appropriate. The subscale alpha reliabilities were .65, .60, and .58, for the factors: Foods, Beverages & Medicine; Side Effects; and Vitamin K Knowledge, respectively. More testing is needed to develop a reliable tool for assessing Coumadin knowledge.

Learning Areas:
Planning of health education strategies, interventions, and programs
Public health or related education
Public health or related nursing

Learning Objectives:
The learner will be able to discuss the effectiveness of the Knowldge Information Profile about Coumadin instrument. The learner will be able to describe the relationships among sociodemographics, health characteristics, and Coumadin knowledge. The learner will be able to define the literacy levels of patients receving care in an urban Coumadin Clinic.

Keywords: Screening Instruments, Health Literacy

Presenting author's disclosure statement:

Qualified on the content I am responsible for because: I am qualified because I have conducted national and international research in the area of childhood immunizations, help seeking behaviors for patients receiving radiation therapy, and patient health literacy for over 20 years.
Any relevant financial relationships? No

I agree to comply with the American Public Health Association Conflict of Interest and Commercial Support Guidelines, and to disclose to the participants any off-label or experimental uses of a commercial product or service discussed in my presentation.

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