TY - JOUR
T1 - Results of the randomized danish lung cancer screening trial with focus on high-risk profiling
AU - Wille, Mathilde M.W.
AU - Dirksen, Asger
AU - Ashraf, Haseem
AU - Saghir, Zaigham
AU - Bach, Karen S.
AU - Brodersen, John
AU - Clementsen, Paul F.
AU - Hansen, Hanne
AU - Larsen, Klaus R.
AU - Mortensen, Jann
AU - Rasmussen, Jakob F.
AU - Seersholm, Niels
AU - Skov, Birgit G.
AU - Thomsen, Laura H.
AU - Tønnesen, Philip
AU - Pedersen, Jesper H.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Rationale: As of April 2015, participants in the Danish Lung Cancer Screening Trial had been followed for at least 5 years since their last screening. Objectives: Mortality, causes of death, and lung cancer findings are reported to explore the effect of computed tomography (CT) screening. Methods: A total of 4,104 participants aged 50-70 years at the time of inclusion and with a minimum 20 pack-years of smoking were randomized to have five annual low-dose CT scans (study group) or no screening (control group). Measurements and Main Results: Follow-up information regarding date and cause of death, lung cancer diagnosis, cancer stage, and histology was obtained from national registries. No differences between the two groups in lung cancer mortality (hazard ratio, 1.03; 95% confidence interval, 0.66-1.6; P = 0.888) or all-cause mortality (hazard ratio, 1.02; 95% confidence interval, 0.82-1.27; P = 0.867) were observed. More cancers were found in the screening group than in the no-screening group (100 vs. 53, respectively; P,0.001), particularly adenocarcinomas (58 vs. 18, respectively; P,0.001). More early-stage cancers (stages I and II, 54 vs. 10, respectively; P, 0.001) and stage IIIa cancers (15 vs. 3, respectively; P = 0.009) were found in the screening group than in the control group. Stage IV cancers were nonsignificantly more frequent in the control group than in the screening group (32 vs. 23, respectively; P = 0.278). For the highest-stage cancers (T4N3M1, 21 vs. 8, respectively; P = 0.025), this difference was statistically significant, indicating an absolute stage shift. Older participants, those with chronic obstructive pulmonary disease, and those with more than 35 pack-years of smoking had a significantly increased risk of death due to lung cancer, with nonsignificantly fewer deaths in the screening group. Conclusions: No statistically significant effects of CT screening on lung cancer mortality were found, but the results of post hoc high-risk subgroup analyses showed nonsignificant trends that seem to be in good agreement with the results of the National Lung Screening Trial.
AB - Rationale: As of April 2015, participants in the Danish Lung Cancer Screening Trial had been followed for at least 5 years since their last screening. Objectives: Mortality, causes of death, and lung cancer findings are reported to explore the effect of computed tomography (CT) screening. Methods: A total of 4,104 participants aged 50-70 years at the time of inclusion and with a minimum 20 pack-years of smoking were randomized to have five annual low-dose CT scans (study group) or no screening (control group). Measurements and Main Results: Follow-up information regarding date and cause of death, lung cancer diagnosis, cancer stage, and histology was obtained from national registries. No differences between the two groups in lung cancer mortality (hazard ratio, 1.03; 95% confidence interval, 0.66-1.6; P = 0.888) or all-cause mortality (hazard ratio, 1.02; 95% confidence interval, 0.82-1.27; P = 0.867) were observed. More cancers were found in the screening group than in the no-screening group (100 vs. 53, respectively; P,0.001), particularly adenocarcinomas (58 vs. 18, respectively; P,0.001). More early-stage cancers (stages I and II, 54 vs. 10, respectively; P, 0.001) and stage IIIa cancers (15 vs. 3, respectively; P = 0.009) were found in the screening group than in the control group. Stage IV cancers were nonsignificantly more frequent in the control group than in the screening group (32 vs. 23, respectively; P = 0.278). For the highest-stage cancers (T4N3M1, 21 vs. 8, respectively; P = 0.025), this difference was statistically significant, indicating an absolute stage shift. Older participants, those with chronic obstructive pulmonary disease, and those with more than 35 pack-years of smoking had a significantly increased risk of death due to lung cancer, with nonsignificantly fewer deaths in the screening group. Conclusions: No statistically significant effects of CT screening on lung cancer mortality were found, but the results of post hoc high-risk subgroup analyses showed nonsignificant trends that seem to be in good agreement with the results of the National Lung Screening Trial.
KW - Chronic obstructive pulmonary disease
KW - Computed tomography
KW - Lung cancer
KW - Screening
UR - http://www.scopus.com/inward/record.url?scp=84979093897&partnerID=8YFLogxK
U2 - 10.1164/rccm.201505-1040OC
DO - 10.1164/rccm.201505-1040OC
M3 - Article
C2 - 26485620
AN - SCOPUS:84979093897
SN - 1073-449X
VL - 193
SP - 542
EP - 551
JO - American Journal of Respiratory and Critical Care Medicine
JF - American Journal of Respiratory and Critical Care Medicine
IS - 5
ER -