- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT00481897
Worksite Nutrition Study
Aperçu de l'étude
Statut
Les conditions
Intervention / Traitement
Description détaillée
Approximately 65 percent of Americans are overweight or obese. They are at increased risk for diabetes, hypertension, dyslipidemia, cardiovascular disease, arthritis, respiratory disorders, pregnancy complications, and premature death. Research has demonstrated that weight status is associated with certain types of malignancies, including endometrial, colon, gall bladder, prostate, kidney, and postmenopausal breast cancer. The total direct and indirect costs attributed to overweight and obesity amounted to 117 billion U.S. dollars in 2000.
The 22-week Worksite Nutrition Study will (1) test whether a worksite intervention, which prescribes a low-fat vegan diet, is effective in promoting clinically significant weight loss, (2) evaluate whether the intervention reduces cardiovascular risk, particularly blood pressure and lipid concentrations, (3) assess whether the intervention improves glycemic control in individuals with type 2 diabetes, and (4) examine how the intervention affects work impairment and absenteeism.
Participants (Group 1, n=60) at a specified worksite will be assigned to the diet intervention program, which prescribes a low-fat, vegan diet. A control group (Group 2, n=60) will be designated at a separate worksite. The participants in the control group will not receive an active intervention during the designated study period. Participants in the active intervention will attend weekly group meetings for nutrition education on the intervention diet.
Diets will be assessed, in order to monitor adherence and for the purposes of comparison, in the intervention and control groups at baseline and at weeks 11 and 22 using a 3-day dietary record. Dependent measures, including body weight, blood pressure, lipid concentrations, quality-of-life measures, and A1c (for those with diabetes) will be assessed in the intervention and control groups at weeks 0, 11, and 22.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
-
-
District of Columbia
-
Washington, District of Columbia, États-Unis, 20016
- Washington Center for Clinical Research
-
-
Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- employee at the intervention worksite or the control worksite;
- BMI > 25 or a diagnosis of type 2 diabetes mellitus, as defined by a fasting plasma glucose concentration > 126 mg/dl on two occasions or a prior physician's diagnosis of type 2 diabetes with the use of hypoglycemic medications for at least six months;
- male or female;
- age at least 18 years;
- ability and willingness to participate in all components of the study; and
- a willingness to be assigned to a low-fat, vegan diet or control group.
Exclusion Criteria:
- a history of alcohol abuse or dependency followed by any current use;
- current or unresolved past drug abuse;
- pregnancy;
- history of severe mental illness;
- unstable medical status;
- already following a low-fat, vegetarian diet;
- an inordinate fear of blood draw; and
- A1c <7 or >10.5% (for volunteers with diabetes).
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Non randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Aucun (étiquette ouverte)
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Délai |
---|---|
Assignment to a diet intervention program promotes clinically significant weight loss, compared to a control group.
Délai: 22 weeks
|
22 weeks
|
Assignment to the diet intervention program improves indices of cardiovascular risk, including plasma lipid concentrations and blood pressure, compared to a control group.
Délai: 22 weeks
|
22 weeks
|
Assignment to the diet intervention program improves glycemia in a sub-group of participants with type 2 diabetes, as indicated by mean A1c, relative to matched participants with type 2 diabetes in the control group.
Délai: 22 weeks
|
22 weeks
|
Assignment to the diet intervention, decreases the prevalence of work absenteeism, as measured by the proportion of days that a participant is absent from work, compared with assignment to a control group.
Délai: 22 weeks
|
22 weeks
|
Mesures de résultats secondaires
Mesure des résultats |
Délai |
---|---|
Assignment to the diet intervention improves quality of life measures, including general mental and physical health, relative to assignment to a control group.
Délai: 22 weeks
|
22 weeks
|
Assignment to the diet intervention program promotes adherence and acceptability.
Délai: 22 weeks
|
22 weeks
|
Collaborateurs et enquêteurs
Les enquêteurs
- Chercheur principal: Neal Barnard, M.D., Washington Center for Clinical Research
- Chercheur principal: Hope Ferdowsian, M.D., M.P.H., Washington Center for Clinical Research
Publications et liens utiles
Publications générales
- Levin SM, Ferdowsian HR, Hoover VJ, Green AA, Barnard ND. A worksite programme significantly alters nutrient intakes. Public Health Nutr. 2010 Oct;13(10):1629-35. doi: 10.1017/S136898000999303X. Epub 2010 Jan 15.
- Katcher HI, Ferdowsian HR, Hoover VJ, Cohen JL, Barnard ND. A worksite vegan nutrition program is well-accepted and improves health-related quality of life and work productivity. Ann Nutr Metab. 2010;56(4):245-52. doi: 10.1159/000288281. Epub 2010 Apr 14.
- Ferdowsian HR, Barnard ND, Hoover VJ, Katcher HI, Levin SM, Green AA, Cohen JL. A multicomponent intervention reduces body weight and cardiovascular risk at a GEICO corporate site. Am J Health Promot. 2010 Jul-Aug;24(6):384-7. doi: 10.4278/ajhp.081027-QUAN-255.
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
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
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- WCCR-07065-01
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