NCCN Guidelines for Patients® | Lung Cancer Screening - page 12

NCCN Guidelines for Patients
: Lung Cancer Screening
Version 1.2014
For example:
1.5 pack a day
x 30 years
= 45 pack years
Part 3: Should I start now?
Screening based on risk
The best screening program will have large
benefits while the dangers are few and minor.
Benefits should include better survival and
quality of life, less testing and treatment, support
to quit smoking, and lower costs. Before starting
a screening program, talk with your doctor about
all the benefits and possible dangers of the
The NCCN Guidelines support screening for
people at high risk for lung cancer.
has shown that screening reduces death
from lung cancer among people at high
Limiting screening to those at high risk also
helps people at lower risk avoid the dangers of
screening. The criteria for high-, moderate-, and
low-risk groups are listed in the chart.
The risk groups are divided mostly by age and the amount of smoking. The
amount of smoking is based on pack years. A pack year is defined as 20
cigarettes smoked every day for 1 year. It can be calculated by the number
of cigarette packs smoked every day multiplied by the number of years
of smoking. Pack years can be hard to add up because smoking habits
change. See Part 6 for webpages with pack-year calculators.
Number of packs per day
x years of smoking
= pack years
Risk groups
Start lung cancer screening
Risk criteria
Screening recommendation
High risk
• ≥55 years old, and
• ≥30 pack years of smoking
(Unless quit smoking >15 years ago)
Moderate risk
• ≥50 years old, and
• ≥20 pack years of smoking or
second-hand smoke, and
• No other risk factors
Low risk
• <50 years old, and/or
• <20 pack years of smoking
No screening at this time
No screening at this time
Start lung cancer screening
High risk
• ≥50 years old,
• ≥20 pack years of smoking, and
• One other risk factor (except for
second-hand smoke)
1...,2,3,4,5,6,7,8,9,10,11 13,14,15,16,17,18,19,20,21,22,...44
Powered by FlippingBook