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document
Predictors of blood pressure change in a series of controlled dietary intervention studies . Three controlled dietary intervention studies were carried out in 1981-1983 in North Karelia , Finland , to asses the impact of dietary fat intake modification on blood pressure ( BP ) . All these studies involved middle-aged men and women in rural or semirural areas and comprised a baseline period , a six week ( or 12 weeks in the third study ) intervention period and a four to six week return to baseline . During the intervention period the total fat intake was reduced from 39 % to 24 % of energy and the polyunsaturated/saturated ( P/S ) ratio increased from 0.2 to 0.4-1.2 . In all groups energy intake was kept constant . For the present report data from the three studies were pooled for a series of stepwise regression analyses to predict changes in BP with different dietary changes . For both systolic ( SBP ) and diastolic ( DBP ) blood pressure , change in polyunsaturated fatty acid intake was the strongest dietary predictor of BP change . Changes in body weight , total fat intake , urinary sodium and potassium did not have significant predictive power in any of the analyses . The findings support the hypothesis that modification of dietary fat intake is a significant predictor of change in BP .
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Intervention_Other
dietary intervention
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Intervention_Other
fat intake
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Intervention_Pharmacological
polyunsaturated/saturated ( P/S ) ratio
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Outcome_Physical
blood pressure change
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Outcome_Physical
blood pressure ( BP )
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Outcome_Physical
total fat intake
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Outcome_Physical
BP
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Outcome_Physical
systolic ( SBP ) and diastolic ( DBP ) blood pressure
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Outcome_Physical
BP change
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Outcome_Physical
body weight , total fat intake , urinary sodium and potassium
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Outcome_Physical
BP
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Participant_Condition
1981-1983 in North Karelia , Finland
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Participant_Condition
middle-aged men and women in rural or semirural areas and comprised a baseline period , a six week ( or 12 weeks in the third study ) intervention period and a four to six week return to baseline .