Onions and all-cause mortality/survival.

Data about onions was provided by 2 cohorts. A significant protective effect (trend) was found in one cohort (9), and a nonsignificant protective effect was found in the other cohort (11).

Conclusion: Protective effects were found in 2 cohorts, but cohort sizes were (very) small, and associations were not always significant. No evidence was found for an association between onions and mortality.

Author

Cohort name

Subjects

Years of follow-up

Cases

End point

Consumption of

Relative Risk (RR)

Adjustments

11) Hertog MG (1997)

The Caerphilly Study.

1900 Welsh men aged 45-59.

338

Total mortality

Onion

RR = 0.7 (0.5-1.0; P = 0.086) for the highest vs lowest quartile of consumption.

Amount specific data (frequency of use/wk):
< 1: RR = 1.
1: RR = 0.8 (0.6-1.1).
2: RR = 1.0 (0.7-1.4).
> 2: RR = 0.7 (0.5-1.0).

Age, smoking, social class, BMI, and intakes of total energy, alcohol, fat, vitamin C, vitamin E, and beta carotene.

9) Knekt P. (2002)

The Finnish Mobile Clinic Health Examination Cohort.

10,054 men and women.

28
(1967-1994)

2,085?

Total mortality

Onions

RR = 0.89 (0.77-1.03; P = 0.02).
No data shown, but probably for the highest vs lowest quartile of consumption.

Age, sex, geographic area, occupation, blood pressure, smoking, serum cholesterol, BMI, and diabetes.

9) Knekt P (1996)

The Finnish Mobile Clinic Health Examination Cohort.

5133 subjects (2748 men and 2385 women) aged 30-69.

26
(1967-72 to 1992)

1364?

Total mortality

Onions


Men:	Women:
RR = 0.72 (0.59-0.87) for the highest vs lowest quartile of consumption (≥ 5 vs 0 g).	RR = 0.80 (0.62-1.04) for the highest vs lowest quartile of consumption (≥ 5 vs 0 g).

Adjustment for the intake of other fruits and vegetables, did not materially alter the results (data not shown).

Age, smoking, serum cholesterol, hypertension, and BMI.

Mortality & Diet.

A systematic review.

Literature review

Relating various aspects of our
diet to mortality & survival.

Onions and all-cause mortality/survival.

Mortality & Diet.

A systematic review.

Literature review

Relating various aspects of ourdiet to mortality & survival.

Onions and all-cause mortality/survival.

Relating various aspects of our
diet to mortality & survival.