Consumption of dietary polyunsaturated fat and cardiovascular disease.

Total polyunsaturated fat and total cardiovascular disease (CVD).

Results: Data about polyunsaturated fat consumption and total CVD was provided by 5 cohorts, including 2,500 cases.
A significant protective effect was found in one cohort of very small size (Laaksonen DE [32]). No other associations were found. The average RR = 1.07.
Effect modification: No data was found.
Subjects with prevalent disease: One cohort included women with type 2 diabetes only (Tanasescu M [13]), and another cohort included subjects with CHD only (Erkkilä AT [28]). No associations were found.

Conclusion: Few associations were found. No evidence was found for an association between polyunsaturated fat consumption and total cardiovascular disease.

Prospective studies of dietary polyunsaturated fat and total cardiovascular disease:
AuthorCohort nameCasesEnd pointRelative Risk (RR)
45) Houston DK (2010)The Health ABC Study203RiskHR = 1.07 (0.71-1.62; P = 0.78).
32) Laaksonen DE (2005)The Kuopio Ischaemic Heart Disease Risk Factor Study78MortalityRR = 0.45 (0.23-0.90; P = 0.02).
31) Leosdottir M (2007)The Malmö Diet and Cancer Study973 men, and

583 women
RiskMen: HR = 1.12 (0.90-1.39; P = 0.3).

Women: HR = 1.20 (0.91-1.60; P = 0.3).
28) Erkkilä AT (2003)The Finnish cohort of the EUROASPIRE Study44RiskRR = 1.08 (0.82-1.42; P = 0.57).
13) Tanasescu M (2004)The Nurses' Health Study619RiskRR = 0.96 (0.70-1.31; P = 0.92).
Total number of cases: 2,500Average RR = 1.07

Total polyunsaturated fat and coronary heart disease (CHD).

Results:
Coronary heart disease risk: Data was provided by 18 cohorts, including 7,057 cases.
Significant protective effects were found in 2 cohorts, including 1,981 cases (Shekelle RB [1], Oh K [13]). But nonsignificantly increased risks were found in 3 (sub)cohorts (Boniface DR [24], Leosdottir M [31], Corella D [44]). The RR, but not the trend increased in the first of these 3 cohorts. RR's were missing for 10 cohorts, and not clearly defined for an eleventh cohort (Leosdottir M [31]), leaving only 7 cohorts for a risk estimate. The average RR = 0.95.
Coronary heart disease mortality: Data was provided by 14 cohorts, including 1,921 cases.
A significantly increased risk was found in one cohort (Pietinen P [19]), and a protective in another cohort (Shekelle RB [1]). RR's were available from only 4 cohorts. The average RR = 1.18.
Effect modification:

  • In a cohort of large size, the protective effect was restricted to women aged < 65 (Oh K [13]). Both other (non)significant protective effects were found among relatively young cohorts, including subjects aged < 65 only (Shekelle RB [1], Soinio M [26]).
  • In a cohort of large size, the protective effect was restricted to women with a BMI ≥ 25 (Oh K [13]).
  • No significant interaction was found with smoking, hypertension, and serum cholesterol (Knekt P [15]), or with menopausal status and hormone use (Oh K [13]).

Subjects with prevalent disease: One cohort included subjects with type 2 diabetes only. A nonsignificant protective effect was found among men (Soinio M [26]). Another cohort included subjects with CHD only. No associations were found (Erkkilä AT [28]).

Conclusion: Few and inconsistent effects were found. No evidence was found for an association between polyunsaturated fat consumption and coronary heart disease, but the possibility of an effect among subgroups of the population can not be excluded.

Prospective studies of dietary polyunsaturated fat and coronary heart disease:
AuthorCohort nameCasesEnd pointRelative Risk (RR)
44) Corella D (2010)The Spanish part of the EPIC Study534RiskA nonsignificantly increased risk (P = 0.09).
35) Xu J (2006)The Strong Heart Study403RiskHR = 1.12 (0.82-1.54; P = 0.69).
31) Leosdottir M (2007)The Malmö Diet and Cancer Study908

(no data for men vs women)
RiskMen: HR = 1.20 (0.92-1.55; P = 0.1).

Women: HR = 1.16 (0.79-1.71; P = 0.7).
29) Jakobsen MU (2004)4 Danish cohorts228 men, and

98 women
RiskMen: HR = 0.86 (0.62-1.20).

Women: HR = 0.83 (0.47-1.45).
28) Erkkilä AT (2003)The Finnish cohort of the EUROASPIRE Study34RiskRR = 1.08 (0.78-1.51; P = 0.64).
26) Soinio M (2003)No cohort name defined74 men, and

24 women
Risk (men), and

Mortality (women)
Men: A protective effect.

Women: No significant association (P = 0.18).
24) Boniface DR (2002)The Health and Lifestyle Survey98 men, and

57 women
MortalityMen: No significant association (P = 0.66).

Women: A nonsignificantly increased risk (P = 0.46).
19) Pietinen P (1997)The ATBC Study1,399RiskRR = 1.11 (0.94-1.31; P = 0.47).
18) Esrey KL (1996)The Lipid Research Clinics Prevalence Follow-Up Study52 aged < 60, and

40 aged ≥ 60
MortalityAged < 60: RR = 0.99 (0.90-1.08).

Aged ≥ 60: RR = 1.00 (0.90-1.10).
16) Kromhout D (1995)No cohort name defined58MortalityNo significant association.
15) Knekt P (1994)The Finnish Mobile Clinic Health Cohort244MortalityNo significant association.
13) Oh K (2005)The Nurses' Health Study1,766RiskRR = 0.75 (0.60-0.92; P = 0.004).
8) Kushi LH (1985)The Ireland Boston Diet-Heart Study110MortalityNo significant association (P = 0.45).
7) Kromhout D (1984)The Zutphen Study30MortalityNo significant association (P = 0.13).
5) Posner BM (1991)The Framingham Study99 aged < 56, and

114 aged ≥ 56
RiskAged < 56: RR = 1.34 (0.93-1.93).

Aged ≥ 56: RR = 1.26 (0.82-1.93).
5) Gordon T (1981)The Puerto Rico Heart Health Program163RiskNo significant association.
3) McGee DL (1984)The Honolulu Heart Program309RiskNo significant association.
1) Shekelle RB (1981)The Western Electric Study215MortalityA significant protective effect (P = 0.01).
Total number of cases: 7,057Average RR = 0.95


Prospective studies of dietary polyunsaturated fat and total coronary heart disease mortality:
AuthorCohort nameCasesRelative Risk (RR)
35) Xu J (2006)The Stong Heart Study46 aged < 60, and

92 aged ≥ 60
Aged < 60: HR = 1.47 (0.55-3.96; P = 0.78).

HR = 0.69 (0.35-1.36; P = 0.30).
28) Erkkilä AT (2003)The Finnish cohort of the EUROASPIRE Study16RR = 0.92 (0.55-1.54; P = 0.76).
26) Soinio M (2003)No cohort name defined41 men, and

24 women
Men: A nonsignificant protective effect (P = 0.07).

Women: No significant association (P = 0.18).
24) Boniface DR (2002)The Health and Lifestyle Survey98 men, and

57 women
Men: No significant association (P = 0.66).

Women: A nonsignificantly increased risk (P = 0.46).
19) Pietinen P (1997)The ATBC Study635RR = 1.27 (1.00-1.61; P = 0.034).
18) Esrey KL (1996)The Lipid Research Clinics Prevalence Follow-Up Study52 aged < 60, and

40 aged ≥ 60
Aged < 60: RR = 0.99 (0.90-1.08).

Aged ≥ 60: RR = 1.00 (0.90-1.10).
16) Kromhout D (1995)No cohort name defined58No significant association.
15) Knekt P (1994)The Finnish Mobile Clinic Health Cohort244No significant association.
8) Kushi LH (1985)The Ireland Boston Diet-Heart Study110No significant association (P = 0.45).
7) Kromhout D (1984)The Zutphen Study30No significant association (P = 0.13).
5) Gordon T (1981)The Framingham Study14No significant association.
5) Gordon T (1981)The Puerto Rico Heart Health Program71No significant association.
5) Gordon T (1981)The Honolulu Heart Study78No significant association.
1) Shekelle RB (1981)The Western Electric Study215A significant protective effect (P = 0.01).
Total number of cases: 1,921Average RR = 1.18

Total polyunsaturated fat and stroke.

Results:
Total stroke: Data was provided by 6 cohorts, including 1,128 cases.
No significant association was found in any cohort. RR's were available from 3 cohorts. The average RR = 1.09.
Ischemic stroke: Data was provided by 6 cohorts, including 1,532 cases.
No significant association was found in any cohort. RR's were available from 3 cohorts. The average RR = 0.98.
Hemmorhagic stroke: Data was provided by 3 cohorts, including 308 cases.
No significant association was found in any cohort. The average RR = 0.86.
Effect modification: No effect modification was suggested by the limited amount of data.
Subjects with prevalent disease: No data was found.

Conclusion: No associations were found. No evidence was found for an association between polyunsaturated fat consumption and stroke.

Prospective studies of dietary polyunsaturated fat and total stroke:
AuthorCohort nameCasesEnd pointRelative Risk (RR)
20) Ross RK (1997)No cohort name defined245MortalityRR = 1.3 (0.9-1.8).
13) He K (2003)The Health Professionals Follow Up Study455 ischaemic stroke, and

125 haemorrhagic stroke
RiskIschaemic stroke: RR = 0.86 (0.59-125; P = 0.26).

Haemorrhagic stroke: RR = 0.95 (0.46-1.98; P = 0.99).
12) Simon JA (1995)The Multiple Risk Factor Intervention Trial96RiskNo significant association.
10) Khaw KT (1987)The Rancho Bernardo Cohort24MortalityNo significant association.
9) Seino F (1997)The Shibata Study141RiskRR = 1.57 (0.50-4.94; P = 0.46).
7) Keli SO (1994)The Zutphen Study42RiskNo significant association.
Total number of cases: 1,128Average RR = 1.09


Prospective studies of dietary polyunsaturated fat and ischemic stroke:
AuthorCohort nameCasesEnd pointRelative Risk (RR)
41) Boden-Albala B (2009)The Northern Manhattan Study142RiskNo significant association.
31) Leosdottir M (2007)The Malmö Diet and Cancer Study648

No data for men vs women
RiskMen: HR = 1.06 (0.74-1.51; P = 0.9).

Women: HR = 1.06 (0.71-1.59; P = 0.8).
30) Sauvaget C (2004)The Adult Health Study60MortalityRH = 0.99 (0.48-2.02; P = 1.00).
25) Iso H (2003)No cohort name defined166RiskNo significant association.
13) He K (2003)The Health Professionals Follow Up Study455RiskRR = 0.86 (0.59-1.25; P = 0.26).
5) Gillman MW (1997)The Framingham Heart Study61RiskNo significant association.
Total number of cases: 1,532Average RR = 0.98


Prospective studies of dietary polyunsaturated fat and hemorrhagic stroke:
AuthorCohort nameCasesEnd pointRelative Risk (RR)
25) Iso H (2003)No cohort name defined68 intraparenchymal hemorrhage, and

41 subarachnoid hemorrhage
RiskIntraparenchymal hemorrhage: RR = 0.86 (0.42-1.75; P = 0.44).

Subarachnoid hemorrhage: No significant association.
13) He K (2003)The Health Professionals Follow Up Study125Haemorrhagic stroke riskRR = 0.95 (0.46-1.98; P = 0.99).
13) Iso H (2003)The Nurses' Health Study74Intraparenchymal hemorrhage riskRR = 0.69 (0.33-1.48; P = 0.59).
Total number of cases: 308Average RR = 0.86