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Pain trajectory defines knee osteoarthritis subgroups: a prospective observational study
- Source :
- Pain
- Publication Year :
- 2020
- Publisher :
- Lippincott, Williams & Wilkins, 2020.
-
Abstract
- Osteoarthritis subgroups/phenotypes, based on pain experience over time, inform on symptom development and delivery of treatment options and open a new avenue toward personalized medicine.<br />Knee osteoarthritis (OA) is a heterogeneous disease, and identification of its subgroups/phenotypes can improve patient treatment and drug development. We aimed to identify homogeneous OA subgroups/phenotypes using pain development over time; to understand the interplay between pain and functional limitation in time course; and to investigate subgroups' responses to available pharmacological and surgical treatments. We used group-based trajectory modelling to identify pain trajectories in the phase-3 VIDEO trial (n = 474, 3-year follow-up) and also in the Osteoarthritis Initiative cohort study (n = 4796, 9-year follow-up). We extended trajectory models by (1) fitting dual trajectories to investigate the interplay between pain and functional limitation over time, and (2) including analgesic use as a time-varying covariate. Also, we investigated the relationship between trajectory groups and knee replacement in regression models. We identified 4 pain trajectory groups in the trial and 6 in the cohort. These overlapped and led us to define 4 OA phenotypes: low-fluctuating, mild-increasing, moderate-treatment-sensitive, and severe-treatment-insensitive pain. Over time, functional knee limitation followed the same trajectory as pain with almost complete concordance (94.3%) between pain and functional limitation trajectory groups. Notably, we identified a phenotype with severe pain that did not benefit from available treatments, and another one most likely to benefit from knee replacement. Thus, knee OA subgroups/phenotypes can be identified based on patients' pain experiences in studies with long and regular follow-up. We provided a robust approach, reproducible between different study designs, which informs clinicians about symptom development and delivery of treatment options and opens a new avenue toward personalized medicine in OA.
- Subjects :
- medicine.medical_specialty
Knee Joint
Concordance
medicine.medical_treatment
Analgesic
Pain
Knee replacement
Osteoarthritis
Cohort Studies
03 medical and health sciences
0302 clinical medicine
Physical medicine and rehabilitation
030202 anesthesiology
medicine
Humans
Group-based trajectory modelling
business.industry
Clinical study design
Osteoarthritis, Knee
medicine.disease
Phenotype
Anesthesiology and Pain Medicine
Neurology
Cohort
Disease Progression
Observational study
Neurology (clinical)
business
030217 neurology & neurosurgery
Research Paper
Cohort study
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Pain
- Accession number :
- edsair.doi.dedup.....b2b38d52d3900a798de1c5c35deba95e