Increased use of diagnostic CT imaging increases the detection of stage IA lung cancer: pathways and patient characteristics

Table 1 Frequencies of lung cancer in each stage-group, 2013-2015 and 2016-2018, with statistical comparison of the rate of change in each stage-group between geographical areas

	Silkeborg						The Central Denmark Region, except Silkeborg					Denmark, except the Central Denmark Region
Clinical stage	Frequency 2013–2015	Frequency 2016–2018	Absolute change	Relative change	p-value vs. Region M.	p-value vs. Denmark	Frequency 2013–2015	Frequency 2016–2018	Absolute change	Relative change	p-value vs. Denmark	Frequency 2013–2015	Frequency 2016–2018	Absolute change	Relative change
IA	36	86	50	2.39	0.004	0.001	359	473	114	1.32	0.23	1205	1441	236	1.20
IB	13	29	16	2.23	0.01	0.06	182	171	-11	0.94	0.07	672	788	116	1.17
II	16	26	10	1.63	0.26	0.43	206	225	19	1.09	0.39	789	946	157	1.20
III	49	62	13	1.27	0.69	0.34	445	516	71	1.16	0.18	2125	2232	107	1.05
IV	117	93	-24	0.79	0.09	0.14	1262	1297	35	1.03	0.32	5415	5326	-89	0.98
NA	20	7	-13	0.35	0.30	0.11	190	116	-74	0.61	0.14	857	635	-222	0.74
Total	251	303	52	1.21	0.15	0.06	2644	2798	154	1.06	0.33	11,063	11,368	305	1.03

ISSN: 1471-2407