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- Essai clinique NCT00501904
Metformin in Infertile PCOS Patients
Efficacy of Long- Versus Short-term Metformin Protocol in Infertile Anovulatory PCOS Patients
Metformin, an oral biguanide administrated for treating type-2 diabetes mellitus, is a safe and effective drug recently experimented also in patients with polycystic ovary syndrome (PCOS). The administration of metformin induces ovulatory cycles in CC-resistant or -nonresistant patients with PCOS, and improves the ovulation rate as an additional treatment in women who received CC.
To date, it is unknown the best protocol for metformin administration. In particular, it is not known how long patients who ovulate under metformin should continue treatment before switching to second-line ovulation induction therapy. In this regard, in a recent study by the Kaplan-Meier survival analysis we demonstrated that the first pregnancy occurred late after metformin with an estimated median of seven months.
Based on these considerations, the aim of the present study will be to evaluate the clinical efficacy of metformin according to its duration of administration in infertile PCOS patients ovulating under treatment.
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Infertile PCOS patients having three ovulatory cycles under metformin, administered using tailored protocol, will be enrolled and randomized in two groups (groups A and B). Patients of group A will continue metformin administration for further three cycles followed by six months of progestogens cyclically administered, whereas patients of group B will continue metformin therapy for further nine cycles.
All patients eligible will undergo baseline assessment consisting of anthropometric, hormonal, and ultrasonographic evaluations. During the study, the clinical and reproductive outcomes, and the adverse experience will be evaluated in each patient.
Data will be analyzed using the intention-to-treat principle and a P value of 0.05 or less will be considered significant. Continuous variables will be analyzed with the unpaired t test and general linear model for repeated measures analysis with Bonferroni test for the post-hoc analysis as required. For categorical variables, the Pearson chi-square and Fisher's exact tests will be used. Cumulative pregnancy rate, our primary end-point, will be calculated by the Kaplan-Maier method, and the differences between the two groups will be assessed with the log-rank test. Cox proportional-hazards model will be used to calculate the hazard ratio for new pregnancy in both groups.
Type d'étude
Inscription (Anticipé)
Phase
- Phase 4
Contacts et emplacements
Lieux d'étude
-
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Catanzaro, CZ, Italy
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Catanzaro, Catanzaro, CZ, Italy, Italie, 88100
- Recrutement
- Pugliese Hospital
-
Contact:
- Ingrid Tomaino, MD
- Numéro de téléphone: +39-0961965097
- E-mail: angela.falbo@libero.it
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Polycystic ovary syndrome (using NIH criteria)
- Anovulatory infertility (using WHO criteria)
- Ovulatory cycles under metformin (three cycles)
Exclusion Criteria:
- Age <18 or >35 years
- Severe obesity (BMI >35)
- Neoplastic, metabolic, hepatic, and cardiovascular disorders or other concurrent medical illnesses
- Hypothyroidism, hyperprolactinemia, Cushing's syndrome, and non-classical congenital adrenal hyperplasia
- Current or previous (within the last six months) use of oral contraceptives, glucocorticoids, antiandrogens, antidiabetic and anti-obesity drugs or other hormonal drugsPrevious use of ovulation induction agents
- Intention to start a diet or a specific program of physical activity
- Organic pelvic diseases
- Previous pelvic surgery
- Suspected peritoneal factor infertility
- Tubal or male factor infertility or sub-fertility
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Comparateur actif: Group A
Short protocol
|
|
|
Comparateur actif: Group B
Long protocol
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
|---|---|
|
Taux de grossesse
Délai: 12 mois
|
12 mois
|
Mesures de résultats secondaires
Mesure des résultats |
Délai |
|---|---|
|
Ovulation rate Abortion rate Live-birth rate Adverse events
Délai: 21 months
|
21 months
|
Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Stefano Palomba, MD, Department of Obstetrics & Gynecology, University "Magna Graecia" of Catanzaro
- Chercheur principal: Francesco Orio, MD, Department of Endocrinology, University "Federico II" of Naples
- Chercheur principal: Achille Tolino, MD, Department of Obstetrics & Gynecology, University "Federico II" of Naples
Publications et liens utiles
Publications générales
- Palomba S, Orio F Jr, Falbo A, Russo T, Tolino A, Zullo F. Clomiphene citrate versus metformin as first-line approach for the treatment of anovulation in infertile patients with polycystic ovary syndrome. J Clin Endocrinol Metab. 2007 Sep;92(9):3498-503. doi: 10.1210/jc.2007-1009. Epub 2007 Jun 26.
- Palomba S, Orio F Jr, Falbo A, Manguso F, Russo T, Cascella T, Tolino A, Carmina E, Colao A, Zullo F. Prospective parallel randomized, double-blind, double-dummy controlled clinical trial comparing clomiphene citrate and metformin as the first-line treatment for ovulation induction in nonobese anovulatory women with polycystic ovary syndrome. J Clin Endocrinol Metab. 2005 Jul;90(7):4068-74. doi: 10.1210/jc.2005-0110. Epub 2005 Apr 19.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Anticipé)
Achèvement de l'étude (Anticipé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Estimation)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Estimation)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 05/2006b
Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .
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