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16

NCCN Guidelines for Patients

®

:

Lung Cancer Screening, Version 1.2017

3

Should you start now?

Find out your level of risk

Find out your level of risk

Guide 3

lists the criteria for high-, moderate-, and

low-risk groups. There are two groups of people who

are considered to be high risk for lung cancer. At this

time, the strongest evidence is for the first high-risk

group. The first high-risk group consists of people 55

years old and older who have smoked for 30 or more

pack years. However, there is evidence to show that

the second group, people 50 years old or older, could

also benefit from screening.

As seen in

Guide 3

, 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.

Guide 3. People at risk

Level of risk

Screening option

High risk

• ≥55–74 years old

• ≥30 pack years of smoking

• Quit smoking <15 years ago

Screening is an option. Engage in shared decision-

making with your doctor.

In shared decision-making, you and your doctor share

information, weigh the options, and agree on the best

plan.

High risk

• ≥50 years old

• ≥20 pack years of smoking

• Other risk factor(s)

(other than second-hand smoke)

Screening is an option. Engage in shared decision-

making with your doctor.

In shared decision-making, you and your doctor share

information, weigh the options, and agree on the best

plan.

Moderate risk

• ≥50 years old

• ≥20 pack years of smoking or contact with

second-hand smoke

• No other risk factors

No, not at this time.

Low risk

• <50 years old

and/or

• <20 pack years of smoking

No, not at this time.