a1 Hospital de Clínicas de Porto Alegre, Rua Ramiro Barcelos, 2350, Prédio 12, 4° andar, 90035-003, Porto Alegre, RS, Brazil
The role of each Dietary Approaches to Stop Hypertension (DASH) diet component in blood pressure (BP) of patients with diabetes is still uncertain. The aim of the present study was to evaluate possible associations of the recommended food groups of the DASH diet eating plan with BP values in patients with type 2 diabetes. In the present cross-sectional study, 225 patients with type 2 diabetes (age 61·1 (sd 10·4) years; diabetes duration 13·1 (sd 9·1) years; males 48·4 %; BMI 28·5 (sd 4·3) kg/m2; HbA1c 7·1 (sd 1·3) %; systolic BP 136·7 (sd 20·0) mmHg; diastolic BP 78·4 (sd 11·8) mmHg) without dietary counselling during the previous 6 months had their dietary intake assessed by 3 d weighed-diet records. Patients were divided into two groups according to BP tertiles: LOW BP (first tertile) and HIGH BP (second plus third tertiles). Multivariate logistic regression models demonstrated that the daily intake of 80 g of fruits per 4184 kJ (1000 kcal) (OR 0·781; 95 % CI 0·617, 0·987; P = 0·039) or 50 g of vegetables per 4184 kJ (1000 kcal) (OR 0·781; 95 % CI 0·618, 0·988; P = 0·040) reduced the chance of the presence of HIGH mean BP (MBP ≥ 92 mmHg) by 22 % each, adjusted for possible confounders. In conclusion, fruit and vegetables were the food groups of the DASH diet associated with reduced BP values in patients with type 2 diabetes, and their consumption might play a protective role against increased BP values.
(Received November 24 2010)
(Revised September 02 2011)
(Accepted September 03 2011)
(Online publication December 06 2011)
Abbreviations: BP, blood pressure; DASH, Dietary Approaches to Stop Hypertension; GI, glycaemic index; MBP, mean blood pressure; UAE, urinary albumin excretion