| Added by | mollevi |
|---|---|
| Group name | EquipeMY |
| Item Type | Journal Article |
| Title | Item response theory and factor analysis as a mean to characterize occurrence of response shift in a longitudinal quality of life study in breast cancer patients |
| Creator | Anota et al. |
| Author | A. Anota |
| Author | C. Bascoul-Mollevi |
| Author | T. Conroy |
| Author | F. Guillemin |
| Author | M. Velten |
| Author | D. Jolly |
| Author | M. Mercier |
| Author | S. Causeret |
| Author | J. Cuisenier |
| Author | O. Graesslin |
| Author | Z. Hamidou |
| Author | F. Bonnetain |
| Abstract | BACKGROUND: The occurrence of response shift (RS) in longitudinal health-related quality of life (HRQoL) studies, reflecting patient adaptation to disease, has already been demonstrated. Several methods have been developed to detect the three different types of response shift (RS), i.e. recalibration RS, 2) reprioritization RS, and 3) reconceptualization RS. We investigated two complementary methods that characterize the occurrence of RS: factor analysis, comprising Principal Component Analysis (PCA) and Multiple Correspondence Analysis (MCA), and a method of Item Response Theory (IRT). METHODS: Breast cancer patients (n = 381) completed the EORTC QLQ-C30 and EORTC QLQ-BR23 questionnaires at baseline, immediately following surgery, and three and six months after surgery, according to the "then-test/post-test" design. Recalibration was explored using MCA and a model of IRT, called the Linear Logistic Model with Relaxed Assumptions (LLRA) using the then-test method. Principal Component Analysis (PCA) was used to explore reconceptualization and reprioritization. RESULTS: MCA highlighted the main profiles of recalibration: patients with high HRQoL level report a slightly worse HRQoL level retrospectively and vice versa. The LLRA model indicated a downward or upward recalibration for each dimension. At six months, the recalibration effect was statistically significant for 11/22 dimensions of the QLQ-C30 and BR23 according to the LLRA model (p |
| Publication | Health Qual Life Outcomes |
| Volume | 12 |
| Pages | 32 |
| Date | 2014 |
| Journal Abbr | Health and quality of life outcomes |
| DOI | 10.1186/1477-7525-12-32 |
| ISSN | 1477-7525 (Electronic) 1477-7525 (Linking) |
| Tags | Attitude to Health, Breast Neoplasms/*psychology/surgery/therapy, Factor Analysis, Statistical, Female, Humans, Longitudinal Studies, Mastectomy/psychology, Middle Aged, original, Principal Component Analysis, Psychometrics, Quality of Life/*psychology, Questionnaires |
| Date Added | 2019/05/22 - 09:42:41 |
| Date Modified | 2019/05/22 - 09:49:31 |
| Notes and Attachments | (Note) (Note) 24606836 (Attachment) |
Institut de Recherche en Cancérologie de
