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. 2017 Oct 20;39(3):336–346. doi: 10.1093/carcin/bgx113

Table 1.

The number of never- and ever-smokers in controls and lung cancer subtypes.

Data Controls Never1 Ever Ade2 Never Ever Sqc3 Never Ever NSCLC4 Never Ever
Discovery Subset 1 4463 1472 2991 2732 351 2381 1690 28 1662 5017 416 4601
Subset 2 4490 1377 3113 2446 426 2020 1422 87 1335 4569 583 3986
Subset 3 5017 1641 3376 1837 320 1517 1417 44 1373 3750 400 3350
Combined 13970 4490 9480 7015 1097 5918 4529 159 4370 13336 1399 11937
Replication 5377 1605 3772 1759 275 1484 952 38 914 3054 349 2705

1, Never and ever denote smoking status and ever-smokers include current smokers and ex-smokers; 2, adenocarcinoma; 3, squamous cell carcinoma; 4, non-small cell lung cancer, including ade, sqc, large cell lung cancer. IBD analysis was performed to remove the duplicated between discovery and replication data.