The PREDIMED trial (Prevenci<c3><b3>n con Dieta Mediterr<c3><a1>nea) is a randomized, parallel and multicentric cohort with more than 7,000 participants who were randomly assigned to three diet groups (olive oil + mediterranean diet, nuts + mediterranean diet, and low-fat diet -control group-) and followed-up during more than 7 years.
Usage
data(predimed)
Format
A data frame with 6324 observations on the following 15 variables:
group
a factor with levels ControlMedDiet + NutsMedDiet + VOO. Intervention group.
sex
a factor with levels MaleFemale.Sex.
age
Age.
smoke
a factor with levels NeverCurrentFormer.Smoking.
bmi
Body mass index.
waist
Waist circumference.
wth
Waist-to-height ratio.
htn
a factor with levels NoYes.Hypertension.
diab
a factor with levels NoYes .Type-2 diabetes.
hyperchol
a factor with levels NoYes.Dyslipidemia.
famhist
a factor with levels NoYes.Family history of premature CHD.
hormo
a factor with levels NoYes.Hormone-replacement therapy.
p14
MeDiet Adherence score.
toevent
follow-up to main event (years).
event
a factor with levels NoYes.AMI, stroke, or CV Death.
Details
Participants of PREDIMED study were recruited in 2003 and were revisited anually until 2010. In each visit, a large variety of different information was collected: antropometric (body mass index, age, ...), blood samples (Total cholesterol, HDL cholesterol, ...), dietary pattern consumtion using validated questionaries, treatments, etc. Also, cardiovascular events were recorded during the follow-up period.
At recruitment period, each participant was assigned to each of the three diet type group. Periodically (every 6-months approximately), participants were advised to follow the diet corresponding to their group.
To build this example data set approx 85% of original participants were randomly selected. For more information about this data set, see the vignette.
Source
For more information about the study these data come from, visit http://predimed.onmedic.net/.
References
Estruch R, Ros E, Salas-Salvad<c3><b3> J, Covas MI, Corella D, Ar<c3><b3>s F, G<c3><b3>mez-Gracia E, Ruiz-Guti<c3><a9>rrez V, Fiol M, Lapetra J, Lamuela-Raventos RM, Serra-Majem L, Pint<c3><b3> X, Basora J, Mu<c3><b1>oz MA, Sorl<c3><ad> JV, Mart<c3><ad>nez JA, Mart<c3><ad>nez-Gonz<c3><a1>lez MA; PREDIMED Study Investigators (2013). Primary prevention of cardiovascular disease with a Mediterranean diet. New England Journal of Medicine 368(14): 1279-1290.