Findings

What do systematic reviews say?

5 questions · 5 findings · 1 reviews

No studies found 2 · 40%GRADE not reported 0 · 0%Very low 0 · 0%Low 0 · 0%Moderate 0 · 0%High 3 · 60%

Mortality: lung cancer · healthy people and healthy male physicians

Vitamin A showed no clear difference in mortality: lung cancer compared with placebo (high certainty).

1 finding from 1 review

Drugs for preventing lung cancer in healthy people 2020 · Cochrane Headline outcomes only
RR 1.06 [0.81, 1.38]
3 studies · 190118 participants
High

Mortality: lung cancer · healthy people

Vitamin E showed no clear difference in mortality: lung cancer compared with placebo (high certainty).

1 finding from 1 review

Drugs for preventing lung cancer in healthy people 2020 · Cochrane Headline outcomes only
RR 0.96 [0.77, 1.18]
2 studies · 29214 participants
High

Mortality: lung cancer ‐ men · healthy male physicians, period: 1997 to 2007 and female health professionals, period: 1998 to 2005

Vitamin C showed no clear difference in mortality: lung cancer ‐ men compared with placebo (high certainty).

1 finding from 1 review

Drugs for preventing lung cancer in healthy people 2020 · Cochrane Headline outcomes only
RR 0.81 [0.53, 1.23]
1 study · 7326 participants
High

Mortality: lung cancer · relatively healthy postmenopausal women

The review found no eligible studies for this question.

1 finding from 1 review

Drugs for preventing lung cancer in healthy people 2020 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Mortality: lung cancer · healthy women, aged 35 to 60, and men, aged 45 to 60, living in France

The review found no eligible studies for this question.

1 finding from 1 review

Drugs for preventing lung cancer in healthy people 2020 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found