Effects of the Mediterranean Diet on Cardiovascular Risk Profile in Men and Women (ALIMED)-Part 2
5 settembre 2013 aggiornato da: Simone Lemieux, Laval University
Gender Differences in Response to the Mediterranean Diet-Part 2
The purpose of this study is to document differences between men and women (referred here as gender differences) in diet adherence and in changes in specific dietary intakes and energy density in response to a 12-week nutritional education program promoting the Mediterranean diet in both the short term (immediately after the end of the intervention) and longer term (3 and 6 months after the end of the intervention).
The investigators hypothesize that both in the short and the longer term, women will have a better adherence to recommendations promoting the Mediterranean diet than men namely because of higher self-determination.
Panoramica dello studio
Stato
Completato
Condizioni
Descrizione dettagliata
Among the few studies that have addressed gender differences in response to a nutritional program promoting the Mediterranean diet, none has used a theoretical model of dietary adherence.
Accordingly, the Self-Determination Theory suggests that the different behavioral types of regulation are associated with one of the three forms of motivation which are intrinsic motivation, extrinsic motivation and amotivation.
The use of the Self-Determination Theory as a theoretical model of adherence will provide original data on the potential contribution of self-determination to gender differences in adherence to an intervention promoting the Mediterranean diet.
The purpose of this study is to document gender differences between men and women in diet adherence and in changes in specific dietary intakes and energy density in response to a 12-week nutritional education program promoting the Mediterranean diet in both the short term (immediately after the end of the intervention) and longer term (3 and 6 months after the end of the intervention).
Considering that previous studies have shown that women were more likely than men to take action to improve eating habits, rated higher their knowledge of nutrition than men and also indicated that they read product labels more frequently than men, we hypothesize that both in the short and the longer term, women will have a better adherence to recommendations promoting the Mediterranean diet than men namely because of higher self-determination.
Data will be collected before and after the 12-week nutritional education program, as well as 3 and 6 months after the end of the intervention.
Tipo di studio
Interventistico
Iscrizione (Effettivo)
123
Fase
- Non applicabile
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Luoghi di studio
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Quebec
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Québec, Quebec, Canada, G1V 0A6
- Institute of Nutraceuticals and Functional Foods (INAF), Laval University
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Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
Da 25 anni a 50 anni (Adulto)
Accetta volontari sani
No
Sessi ammissibili allo studio
Tutto
Descrizione
Inclusion Criteria:
- Men and premenopausal women from de Quebec City metropolitan area.
- Involved in food purchases and/or meal preparation
- Stable body weight (+/- 2.5 kg) for at least 3 months before the beginning of the study
- Slightly elevated LDL-cholesterol concentrations (≥ 3.0 mM) or total cholesterol to HDL-C ratio ≥ 5.0
At least one of the four following factors of the metabolic syndrome:
- Triglycerides ≥ 1.7 mM;
- Fasting glucose between 6.1 and 6.9 mM;
- Blood pressure concentrations ≥ 130 / 85 mm Hg;
- Waist circumference > 94 cm in men and > 80 cm in women
Exclusion Criteria:
- Smokers
- Alcoholism problem
- Pregnancy
- Cardiovascular and endocrinal diseases
- Medication that could affect dependent variables measured (namely lipid-lowering, hypoglycemic, insulin sensitizers and antihypertensive medication)
- Food allergies/aversions
- Mediterranean score > 29
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: Non randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Nessuno (etichetta aperta)
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
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Sperimentale: Men and Mediterranean diet
The 12-week nutritional education program will include 3 group sessions with 8-12 participants per group, 3 individual counseling sessions, and 4 telephone interviews.
The registered dietitian will encourage participants to make their own decision about dietary changes while promoting their autonomy and competence, and will accept participants' choices, avoiding pressuring them to perform a specific change.
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The 12-week nutritional education program will include 3 group sessions with 8-12 participants per group.
During the 1st group session, the registered dietitian (RD) will explain the major principles of the Mediterranean diet (MedDiet) and related heath benefits.
At week 4, subjects will be invited to a Mediterranean cooking lesson.
At week 8, the group session will address barriers and difficulties in adhering to the recommendations.
Individual sessions will take place at weeks 1, 5 and 10 in order to evaluate the dietary changes and to select further individualized objectives for increasing the adherence to the MedDiet.
The RD will encourage participants to make their own decision about changes while promoting their autonomy and competence.
Qualitative 24-h recalls will be performed by telephone at weeks 3, 6, 9 and 12 to reinforce key principles of the MedDiet.
No further contact with the RD will be offered during the follow-up period.
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Sperimentale: Women and Mediterranean diet
The 12-week nutritional education program will include 3 group sessions with 8-12 participants per group, 3 individual counseling sessions, and 4 telephone interviews.
The registered dietitian will encourage participants to make their own decision about dietary changes while promoting their autonomy and competence, and will accept participants' choices, avoiding pressuring them to perform a specific change.
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Women are assigned to the same intervention than men in order to compare men and women adherence to the Mediterranean diet.
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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
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Diet adherence
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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A Mediterranean score will be used to measure diet adherence.
As described by Dansinger et al, we will use a 10-point score to describe the degree to which each subject achieves the specified dietary target vs baseline intakes.
The target would be a perfect Mediterranean score of 44.
For example, a subject with a Med Score of 20 at baseline and of 30 at t=12 weeks will therefore have an adherence score at t=12 weeks of : (20 - 30) / (20 - 44) =0.42 or 4.2 on a scale of 10.
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At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
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Dietary intakes
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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A 30-min Food Frequency Questionnaire (FFQ) will be administered face-to-face by a Registered Dietitian. A Mediterranean score will be derived from the FFQ. The Mediterranean score could therefore vary between 0 and 44 points. A 3-day weighed food record will be completed in order to derive a precise measurement of energy density. |
At baseline (t=0) and immediately after the 12-week intervention (t=3mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Eating behaviors
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Cognitive dietary restraint, disinhibition, and susceptibility to hunger.
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At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Anthropometric and metabolic parameters
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Anthropometric variables (height, weight, waist and hip circumferences) according to standardized procedures and basic lipid profile, fasting glycemia and insulinemia as well as blood pressure will be measured.
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At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Physical activity level
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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A validated 3-day physical activity record (two weekdays and one weekend day).
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At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Global motivational variables
Lasso di tempo: At baseline (t=0).
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Self-Determination Scale.
Basic Psychological Needs Scale.
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At baseline (t=0).
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Motivational variables in a nutrition context
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Regulation of Eating Behaviors Scale.
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At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Quality of life
Lasso di tempo: At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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SF-36.
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At baseline (t=0) and immediately after the 12-week intervention (t=3 mo) as well as 3 (t=6 mo) and 6 months (t= 9 mo) after the end of the intervention.
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Health-Care Climate
Lasso di tempo: After the end of the 12-week intervention (t=3 mo).
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Health-Care Climate Questionnaire.
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After the end of the 12-week intervention (t=3 mo).
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Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Sponsor
Investigatori
- Investigatore principale: Simone Lemieux, Ph.D., Dt.P, Department of food sciences and nutrition / Institute of Nutraceutical and Functional Foods (INAF), Laval University
Pubblicazioni e link utili
La persona responsabile dell'inserimento delle informazioni sullo studio fornisce volontariamente queste pubblicazioni. Questi possono riguardare qualsiasi cosa relativa allo studio.
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio
1 marzo 2010
Completamento primario (Effettivo)
1 novembre 2012
Completamento dello studio (Effettivo)
1 novembre 2012
Date di iscrizione allo studio
Primo inviato
9 maggio 2013
Primo inviato che soddisfa i criteri di controllo qualità
9 maggio 2013
Primo Inserito (Stima)
14 maggio 2013
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
6 settembre 2013
Ultimo aggiornamento inviato che soddisfa i criteri QC
5 settembre 2013
Ultimo verificato
1 settembre 2013
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- 2009-213 A1
- MOP 84568 (Altro numero di sovvenzione/finanziamento: Canadian Institutes of Health Research (MOP 84568))
- 2007-180 (Altro numero di sovvenzione/finanziamento: Heart and Stroke Foundation of Quebec (2007-180))
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 .
Prove cliniche su Experimental: Men and Mediterranean diet
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