Pilot Study Of Pregabalin And Prediction Of Treatment Response In Patients With Postherpetic Neuralgia
A Phase 4 Multicenter, Open-Label, Pilot Study Of Pregabalin And Prediction Of Treatment Response In Patients With Postherpetic Neuralgia
Panoramica dello studio
Stato
Stato
Condizioni
Condizioni
Intervento / Trattamento
Intervento / Trattamento
Descrizione dettagliata
Tipo di studio
Tipo di studio
Iscrizione (Effettivo)
Iscrizione
Fase
Fase
- Fase 4
Contatti e Sedi
Luoghi di studio
-
-
-
Wien, Austria, A-1010
- Pfizer Investigational Site
-
-
A-3541
-
Senftenberg, A-3541, Austria
- Pfizer Investigational Site
-
-
-
-
-
Schwerin, Germania, 19053
- Pfizer Investigational Site
-
-
-
-
Florida
-
Leesburg, Florida, Stati Uniti, 34748
- Pfizer Investigational Site
-
-
Kentucky
-
Lexington, Kentucky, Stati Uniti, 40509
- Pfizer Investigational Site
-
-
North Carolina
-
Raleigh, North Carolina, Stati Uniti, 27612
- Pfizer Investigational Site
-
-
Pennsylvania
-
Jekintown, Pennsylvania, Stati Uniti, 19046
- Pfizer Investigational Site
-
-
-
-
Gauteng
-
Pretoria, Gauteng, Sud Africa, 0122
- Pfizer Investigational Site
-
-
Western Cape
-
Paarl, Western Cape, Sud Africa, 7626
- Pfizer Investigational Site
-
-
Criteri di partecipazione
Criteri di ammissibilità
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
Inclusion Criteria:
- Subjects must have pain present for more than 3 months after the healing of the herpes zoster skin rash.
- At screening (V1) and baseline (V2), subjects must have a score of >=4 on the Numeric Rating Scale for Pain (1 week recall period).
- At baseline (V2), at least 4 pain diaries must be completed satisfactorily within the last 7 days and the average pain score must be >=4.
Exclusion Criteria:
- Subjects having other severe pain that may confound assessment or self evaluation of the pain due to PHN.
- Neurolytic or neurosurgical therapy for Postherpetic Neuralgia
- Skin conditions in the affected dermatome that could alter sensation.
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: N / A
- Modello interventistico: Assegnazione di gruppo singolo
- Mascheramento: Nessuno (etichetta aperta)
Numero di armi
Armi e interventi
Gruppo di partecipanti / ArmGruppo di partecipanti / Arm |
Intervento / TrattamentoIntervento / Trattamento |
|---|---|
|
Sperimentale: Pregabalin (300-600 mg/day; 150 mg/day starting dose)
|
Pregabalin Capsules (150 mg - 600mg), Dose titration (4 weeks) and fixed dose (2 weeks) for a 6 week treatment period.
|
Cosa sta misurando lo studio?
Misure di risultato primarie
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Change From Baseline in the Daily Pain Diary (Numerical Rating Scale, NRS) Mean Pain Score at the End of the Study (Week 6).
Lasso di tempo: Baseline, Week 6
|
The numeric rating scale for pain (NRS-Pain) consists of an 11-point NRS ranging from 0 (no pain) to 10 (worst possible pain).
A rating of 1-3 is considered mild pain; 4-6, moderate pain; and 7-10, severe pain.
|
Baseline, Week 6
|
Misure di risultato secondarie
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Neuropathic Pain Symptom Inventory (NPSI) at All Visits.
Lasso di tempo: All visits
|
NPSI: participant rated questionnaire to evaluate different symptoms of neuropathic pain (dimensions: burning [superficial] spontaneous pain, pressing [deep] spontaneous pain, paroxysmal pain, evoked pain, and paresthesia/dyesthesia [P/D]).
Includes 10 descriptors quantified on a 0 (no symptoms) to 10 (worst symptoms imaginable) and 2 temporal items assessing duration of spontaneous ongoing and paroxysmal pain.
Questionnaire generates a score in each of the relevant dimensions and a total score of 0-100.
Higher score indicates a greater intensity of pain.
|
All visits
|
|
Proportion of Phenotypes Within the 30% and 50% Responder Groups at Baseline and Week 6.
Lasso di tempo: Baseline, Week 6
|
To explore whether sensory symptom cluster analysis is useful for predicting treatment response in paticipants with PHN, identification of the phenotype was initially required of all participants using three different approaches (with or without the baseline PHQ-8, GAD-7 Pain Related Sleep Interference Score Scale, PCS): 1. PainDETECT at baseline, 2. PainPREDICT at baseline, 3. NPSI at baseline.
Then for each of the above phenotypes the distribution of the pregabalin responders (using 30% and 50%) were to be compared.
|
Baseline, Week 6
|
|
Patient Global Impression of Change (PGIC) at Week 6/Early Termination.
Lasso di tempo: Week 6/Early Termination
|
PGIC: participant rated instrument to measure participant's change in overall status on a 7-point scale; range from 1 (very much improved) to 7 (very much worse).
|
Week 6/Early Termination
|
|
Proportions of Participants With >/=30% and >/=50% Pain Reduction Based on Daily Pain Diary at Baseline and Week 6.
Lasso di tempo: Baseline, Week 6
|
The daily pain diary consists of an 11-point numeric scale ranging from 0 ("no pain") to 10 ("worst possible pain").
Participants describe their pain during the previous 24 hours by choosing the appropriate number between 0 and 10.
Self-assessment is performed daily at bedtime on a telephone via interactive voice response system (IVRS).
The endpoint mean pain score is defined as the mean of the last 7 daily diary pain ratings while taking study medication in the open-label phase.
Daily pain IVRS diaries were completed daily at bedtime from Visit 1 (Screening) through Visit 7/Early Termination.
Participants were asked to complete their first IVRS daily at bedtime on the morning after Visit 1.
|
Baseline, Week 6
|
|
Proportion of Participants Within Each Phenotype Group as Determined by Sensory Symptom Clustering Using the PainPREDICT, PainDETECT and Neuropathic Pain Symptom Inventory at Baseline and Week 6.
Lasso di tempo: Baseline, Week 6
|
To explore whether sensory symptom cluster analysis is useful for predicting treatment response in paticipants with PHN, identification of the phenotype was initially required of all participants using three different approaches (with or without the baseline PHQ-8, GAD-7 Pain Related Sleep Interference Score Scale, PCS): 1. PainDETECT at baseline, 2. PainPREDICT at baseline, 3. NPSI at baseline.
|
Baseline, Week 6
|
|
Patient Health Questionnaire-8 (PHQ-8) at Baseline and Week 6; Generalized Anxiety Disorder-7 (GAD-7) at Screening, Visit 2 (Week 0) and Week 6/Early Termination.
Lasso di tempo: Screening, Visit 2 (Week 0) and Week 6/Early Termination
|
The PHQ-8 is a self-administered version of the PRIME-MD diagnostic instrument for common mental disorders.
The PHQ-9 is the depression module, which scores each of the 9 DSM-IV criteria as 0 (not at all) to 3 (nearly every day).
The PHQ-8 is a validated subset of the PHQ-9, which comprises the first 8 items of the measure.
The GAD-7 is a 7-item questionnaire that assesses anxiety.
Participants respond as to how each item applies to them on a 4 point response scale.
The higher the score, the more severe the anxiety.
|
Screening, Visit 2 (Week 0) and Week 6/Early Termination
|
|
Brief Pain Inventory (BPI sf) at Visit 2 (Week 0) and Week 6.
Lasso di tempo: Visit 2 (Week 0), Week 6
|
The Brief Pain Inventory-Short Form (BPI-sf) consists of 5 questions.
Questions 1, 2, 3, and 4 measure pain on an 11-point scale from 0 (no pain) to 10 (worst pain possible).
|
Visit 2 (Week 0), Week 6
|
|
Patient Catastrophizing Scale (PCS) at Visit 2 (Week 0) and Week 6.
Lasso di tempo: Visit 2 (Week 0), Week 6
|
The PCS is a 13-item self report instrument and requires a Grade 6 reading level and has been translated into 12 languages.
It instructs participants to reflect on past experience of pain and indicate their experience using a 5-point scale.
The PCS was designed for research on catastrophizing and pain experience.
Catastrophizing is associated with heightened pain and is "an exaggerated negative mental set brought to bear during actual or anticipated painful experience."
It is a multidimensional construct compromising elements of rumination, magnification, and helplessness and its factor structure has been replicated.
It has a total score and three subscale scores (score range of 0-52).
|
Visit 2 (Week 0), Week 6
|
|
Pain NRS Score; 1 Week Recall Period.
Lasso di tempo: 1 Week
|
The numeric rating scale for pain (NRS-Pain) consists of an 11-point NRS ranging from 0 (no pain) to 10 (worst possible pain).
A rating of 1-3 is considered mild pain; 4-6, moderate pain; and 7-10, severe pain.
|
1 Week
|
|
Short Form 12v2 Health Survey (SF 12v2) at Visit 2 (Week 0), and Week 6/Early Termination.
Lasso di tempo: Visit 2 (Week 0), and Week 6/Early Termination
|
The Short-Form 12 Health Survey (SF-12v2) is a self-administered, validated questionnaire that measures each of the following 8 health aspects: Physical functioning, role limitations due to physical problems, social functioning, bodily pain, mental health, role limitations due to emotional problems, vitality, and general health perception over the past week.
Higher scores indicate a better health-related quality of life.
|
Visit 2 (Week 0), and Week 6/Early Termination
|
|
Change From Baseline to End of the Study (Week 6) in the Daily Sleep Interference Diary (NRS) Mean Pain Score.
Lasso di tempo: Baseline, Week 6
|
The pain-related sleep interference item rating scale is scored on an 11-point numeric rating scale (NRS-Sleep).
It is self-administered by the participant in order to rate how pain has interfered with their sleep during the past 24 hours, ranging from 0 (pain does not interfere with sleep) to 10 (completely interferes (unable to sleep due to pain).
Participants are to describe how their pain has interfered with their sleep during the past 24 hours by choosing the appropriate number on the numeric rating scale.
|
Baseline, Week 6
|
Collaboratori e investigatori
Sponsor
Sponsor
Pubblicazioni e link utili
Collegamenti utili
Studiare le date dei record
Studia le date principali
Inizio studio
Inizio studio
Completamento primario (Effettivo)
Completamento primario
Completamento dello studio (Effettivo)
Completamento dello studio
Date di iscrizione allo studio
Primo inviato
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Stima)
Primo Inserito
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
Ultimo aggiornamento pubblicato
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Termini MeSH pertinenti aggiuntivi
- Malattie del sistema nervoso
- Dolore
- Manifestazioni neurologiche
- Malattie neuromuscolari
- Malattie del sistema nervoso periferico
- Nevralgia
- Nevralgia, posterpetica
- Effetti fisiologici delle droghe
- Meccanismi molecolari dell'azione farmacologica
- Depressori del sistema nervoso centrale
- Agenti del sistema nervoso periferico
- Analgesici
- Agenti del sistema sensoriale
- Agenti tranquillanti
- Psicofarmaci
- Modulatori di trasporto a membrana
- Agenti anti-ansia
- Anticonvulsivanti
- Ormoni e agenti regolatori del calcio
- Bloccanti dei canali del calcio
- Pregabalin
Altri numeri di identificazione dello studio
Altri numeri di identificazione dello studio
- A9001464
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .