Convolvulaceae and lung cancer.

Lung cancer risk: Data about lung cancer risk was provided by 3 cohorts. A significant protective effect was found among men in one cohort (29). No association was found in the remaining cohorts.
Lung cancer mortality: No data was found.

Conclusion: No evidence was found for an association between convolvulaceae and lung cancer.

Author

Cohort name

Subjects

Years of follow-up

Cases

End point

Consumption of

Relative Risk (RR)

Adjustments

29) Wright ME (2008)

The NIH-AARP Diet and Health Study

472,081 subjects (281,288 men and 190,793 women) aged 50-71.
(USA)

8
(1995-2003)

See variables

Lung cancer risk

Convolvulaceae (sweet potatoes and yams)

All men (3,834 cases):
RR = 0.86 (0.75-0.96; P = 0.0008) for the highest vs lowest quintile of consumption.

Amount specific data (servings per 1000 kcal per day):
0: RR = 1.
0.005: RR = 1.00 (0.91-1.10).
0.01: RR = 0.98 (0.89-1.08).
0.03: RR = 0.91 (0.82-1.00).
0.07: RR = 0.86 (0.75-0.96).

**Men. Stratified by smoking status:**
Never smokers (141? cases)	Former smokers (2,110? cases)	Current smokers (1,583? cases)
RR = 0.71 (0.43-1.15; P = 0.46) for the highest vs lowest quintile of consumption.	RR = 0.79 (0.69-0.91; P = < 0.0001) for the highest vs lowest quintile of consumption.	RR = 1.00 (0.85-1.18; P = 0.99) for the highest vs lowest quintile of consumption.

All women (2,201 cases):
RR = 0.95 (0.83-1.09; P = 0.77) for the highest vs lowest quintile of consumption.

Amount specific data (servings per 1000 kcal per day):
0: RR = 1.
0.009: RR = 0.88 (0.77-1.00).
0.02: RR = 0.88 (0.77-1.00).
0.04: RR = 0.93 (0.82-1.06).
0.11: RR = 0.95 (0.83-1.09).

**Women. Stratified by smoking status:**
Never smokers (170? cases)	Former smokers (835? cases)	Current smokers (1,196? cases)
RR = 0.64 (0.41-1.00; P = 0.45) for the highest vs lowest quintile of consumption.	RR = 1.08 (0.88-1.34; P = 0.09) for the highest vs lowest quintile of consumption.	RR = 0.89 (0.74-1.07; P = 0.34) for the highest vs lowest quintile of consumption.

One serving of vegetables = 1 cup of raw, leafy vegetables, 1/2 cup of other vegetables, or 6 ounces of juice.

Age, energy intake, race, education, BMI, smoking status, smoking dose, time since quitting, alcohol intake, physical activity, and family history of any cancer.

14) Feskanich D (2000)

The Nurses' Health Study

&

The Health Professionals' Follow-up Study

77,283 US women (38-63 years) and 47,778 men (40-75 years)

Women: 1984-1996.

Men: 1986-1996.

516? women, and
258? men

Total lung cancer risk

Yams/sweet potatoes

No significant association with risk (no data shown).

Not defined, but probably: age, follow-up cycle, smoking status,years since quitting among past smokers, cigarettes smoked/day among current smokers, age at start of smoking, total energy intake, and availability of diet data after baseline measure.

Cancer & Diet. A systematic review.

Literature review.

Relating various aspects of our diet
to lung cancer risk & mortality.

Convolvulaceae and lung cancer.

Cancer & Diet. A systematic review.

Literature review.

Relating various aspects of our dietto lung cancer risk & mortality.

Convolvulaceae and lung cancer.

Relating various aspects of our diet
to lung cancer risk & mortality.