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Randomized Trial of Dietary Intervention Therapy in Obese Hypertensives (DITOH)

25. november 2013 opdateret af: National Heart, Lung, and Blood Institute (NHLBI)
To determine the effects on blood pressure of dietary intervention, restricting caloric intake to 600 calories per day for 16 weeks compared to a control diet of 1200 calories per day in obese hypertensives. Secondary aims included a study of psychological characteristics at baseline and during the weight loss and maintenance phases of the study.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

BACKGROUND:

Hypertension is a highly prevalent disorder contributing to a large proportion of cardiovascular morbidity and mortality in the United States. Although drug therapy of elevated blood pressure can reduce the risks of cardiovascular morbidity and mortality, such therapy constitutes significant expense for individuals over long periods of time as well as large national expenditures. In addition, the side effects of drug therapy may be significant. DITOH would provide much needed information concerning the effects of various means of weight reduction on blood pressure as possible definitive therapy for hypertension or as an approach which could be combined with reduced drug dosages.

DESIGN NARRATIVE:

Randomized. After three weeks on a control diet, subjects were randomized to the Protein Sparing Modified Fast Diet which provided 600 calories per day (1.5 grams per kilogram of ideal body weight of high quality protein plus 19 grams of fat) or to a 1200 calorie per day Balanced Deficit Diet. After 16 weeks in the weight-loss phase, subjects entered the maintenance program for 20 weeks. Both diets were supplemented with vitamins, minerals, and fluids. The Protein Sparing Modified Fast Diet was supplemented with 5 grams of salt given as bouillon to equal the salt intake of the Balanced Deficit Diet. Patients were followed for 24 months after the end of the weight loss phase. The primary endpoint was change in diastolic blood pressure. Individuals who continued to have diastolic pressures above 104 mm Hg following the initial 16 week treatment period were treated with antihypertensive drugs.

The study completion date listed in this record was obtained from the Query/View/Report (QVR) System.

Undersøgelsestype

Interventionel

Fase

  • Fase 3

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

25 år til 55 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Men and women, ages 25 to 55. Subjects were obese, weighing between 130 and 210 percent of ideal body weight. Subjects had diastolic blood pressures between 90 and 105 mm Hg and were not on antihypertensive medications.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Forebyggelse
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

National Heart, Lung, and Blood Institute (NHLBI)

Efterforskere

  • George Blackburn, Beth Israel Deaconess Medical Center

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. juli 1984

Studieafslutning (Faktiske)

1. september 1992

Datoer for studieregistrering

Først indsendt

27. oktober 1999

Først indsendt, der opfyldte QC-kriterier

27. oktober 1999

Først opslået (Skøn)

28. oktober 1999

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

26. november 2013

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

25. november 2013

Sidst verificeret

1. februar 2005

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 34
  • R01HL031989-06A2 (U.S. NIH-bevilling/kontrakt)

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Sponsorer og samarbejdspartnere

Medicinske tilstande

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Betingelser

Sjældne sygdomme

Narkotikainterventioner

Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

Abonner