The Intentional Non-Adherence Scale (INAS): Initial development and validation

Adherence continues to be a major challenge in healthcare but there is still limited understanding of all the factors which can influence adherence behaviour. The present study was designed to identify a range of factors associated with intentional non-adherence and to see if they could be formed in...

Full description

Saved in:
Bibliographic Details
Published in:Journal of psychosomatic research 2018-12, Vol.115, p.110-116
Main Authors: Weinman, John, Graham, Selina, Canfield, Martha, Kleinstäuber, Maria, Perera, Anna I., Dalbeth, Nicola, Petrie, Keith J.
Format: Article
Language:English
Subjects:
Adherence
Biological markers
Exploratory factor analysis
Factor analysis
Gout
Health care
Hypertension
Illness
Intentional non-adherence
Medical treatment
Medication
Oncology
Patients
Quantitative psychology
Reliability
Self report
Statistical analysis
Treatment
Validity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Adherence continues to be a major challenge in healthcare but there is still limited understanding of all the factors which can influence adherence behaviour. The present study was designed to identify a range of factors associated with intentional non-adherence and to see if they could be formed into a psychometrically sound scale. Patients in three different clinical groups (Hypertension (N = 175); Oncology (N = 115); Gout (N = 196)) were given the new scale together with an adherence self-report and/or biomarker measure. Other, more established measures of factors known to be associated with adherence (BMQ, PAM, BIPQ), were also completed by patients for comparative and validation purposes. Exploratory Factor Analysis (EFA) was conducted to examine the factor structure of the new scale, and other statistical analyses were used for testing the psychometric properties of the new scale. EFA revealed two factors, which were labelled “Resisting illness” and “Testing treatment”. Both scales were found to have good psychometric properties and explained unique variance in adherence in all three clinical groups. This new scale shows promise in describing and explaining some relatively novel factors underlying treatment non-adherence. Further work in different patient groups and clinical contexts is needed to confirm the factor structure and predictive value of these scales. •The INAS contains two new scales assessing reasons for non-adherence to treatment.•Patients may not adhere because they do not want to be reminded of their illness•Others attempt to see if they can get away with taking less or no treatment.•Both factors explain unique variance in subjective and objective adherence markers
ISSN:0022-3999
1879-1360
DOI:10.1016/j.jpsychores.2018.10.010