Table 2

Early Lung Cancer Detection (ELCD) scan results and lung cancers detected by scan type

Outcome measure	All ELCD scans	Baseline scan and required follow-up scans*	First annual scan and required follow-up scans*	All other annual scans and required follow-up scans*
No of low-dose CT scans performed
Baseline low-dose CT scans	1290	1290
Follow-up low-dose CT scans	356	236	57	63
Annual low-dose CT scans†	1659	–	898	761
Individuals with Indeterminate nodules‡	194	154	30	18
Individuals with suspicious nodules†	117	76	20	23
Individuals diagnosed with lung cancer§
Non-small cell lung cancers
Stage I	17	13	2	2
Stage II	3	2	0	1
Stage III	0	0	0	0
Stage IV	6	5	0	1
Small cell lung cancers
Limited	2	1	0	1
Extensive	2	0	2	0
Individuals referred for follow-up other than potential lung cancer*	614	506	161	96
Estimated radiation absorbed dose per scan, measured as dose length product (DLP) (mGy cm)¶
DLP mean	96.8
DLP (SD)	41.0
DLP range	0.5–843.0

*Counts of indeterminate nodules, suspicious nodules and referrals for immediate follow-up will not add to the total as workers can have events for multiple scans.
†Suspicious nodules—non-calcified nodules that are highly suspicious for malignancy and require immediate follow-up. Individuals are referred to outside specialists.
‡Indeterminate nodules—non-calcified nodules that are not obviously benign nor highly suspicious. Individuals are offered a follow-up low-dose CT scan at 3 or 6 months.
§One worker with a suspicious nodule was still being evaluated at the time of these analyses.
¶DLP values were missing for 91 ELCD scans.