Table 1

Characteristics of participants in each randomized intervention group
MD-EVOO MD-nuts Control diet
(n=1446) (n=1293) (n=1184)
Age, years 67.1, 6.2 66.7, 6.0 67.4 (6.4)
Male sex, % 47.1 53.5 46.2
Smoking status, %
  Never-smoker 57.7 56.5 58.1
  Current smoker 14.5 15.2 14.9
Marital status, %
  Married 80.2 79.9 77.0
Educational level, %
  Primary or lower 76.5 75.2 79.1
  University 8.6 8.4 6.3
Disease prevalence, %
  Cancer 2.1 3.2 2.3
  Diabetes 52.4 48.1 50.7
  Hypertension 80.2 81.1 82.3
  Hypercholesterolemia 68.9 69.5 67.7
  Parkinson disease 0.3 0.3 0.3
  Chronic bronchitis 4.8 4.7 5.4
  Fractures 16.1 17.8 18.7
Body mass index, kg/m2 29.8, 3.7 29.6, 3.7 30.1 (4.0)
Total energy intake, kcal/day 2317.9, 619.1 2384.1, 611.0 2256.4 (605.8)
Alcohol intake, g/day 10.0, 15.6 11.2, 17.1 9.0 (14.9)
Physical activity during leisure time, METs-min/day 247.4, 243.6 270.9, 258.7 226.9 (261.1)

Abbreviations: MET metabolic equivalent, EVOO extra virgin olive oil.

Sánchez-Villegas et al.

Sánchez-Villegas et al. BMC Medicine 2013 11:208   doi:10.1186/1741-7015-11-208

Open Data