TABLE 8.

Subset Analyses

Subset	No. Subjects	Incremental Costs	Incremental QALYs	$/QALY
Sex
Men	31,446	$1683	0.0115	147,000
Women	21,856	$1557	0.0340	46,000
Age (years at entry)
55–59	22,773	$1541	0.0101	152,000
60–64	16,333	$1520	0.0320	48,000
65–69	9504	$1900	0.0351	54,000
70–74	4685	$1905	0.0163	117,000
Smoking status
Former	27,643	$1661	0.0027	615,000
Current	25,659	$1601	0.0369	43,000
Lung cancer risk
First quintile	10,660	$1453	0.0086	169,000
Second quintile	10,661	$1454	0.0118	123,000
Third quintile	10,660	$1651	0.0061	269,000
Fourth quintile	10,661	$1672	0.0515	32,000
Fifth quintile	10,660	$1851	0.0354	52,000

Reprinted with permission from Black et al.⁶