Table 1.

Background and clinical characteristics and lung cancer diagnosis in the National Lung Screening Trial (NLST) (n = 53,452)

	n	%
Male Gender	31,530	59.0%
Age (mean ± SD)	61.42 ± 5.02
Race/ethnicity
Non-Hispanic Whites	47,744	90.0%
Non-Hispanic African Americans	2,341	4.4%
Other Races	2,942	5.6%
Education
< High school	3,249	6.2%
High school graduate +	32,423	62.1%
College graduates	16,546	31.7%
Smoking status
Former	27,692	51.8%
Current	25,760	48.2%
Smoking pack-years (mean ± SD), range	55.9 ± 23.9
Family history of lung cancer (= Yes)	11,037	20.7%
COPD (= Yes)	2,690	5.1%
BMI (n = 53,090)
Underweight/Normal (< 25)	15,320	28.9%
Overweight (25–29.99)	22,761	42.9%
Obese (> = 30)	15,009	28.2%
Lung cancer diagnosis	2,058	3.9%
Lung cancer stage
Stage I	831	40.4%
Stage II	146	7.1%
Stage III	459	22.3%
Stage IV	596	28.9%
No stage recorded	26	1.3%
Histology
Adenocarcinoma	902	44.4%
Squamous cell carcinoma	462	22.7%
Large cell carcinoma	52	2.6%
Small cell carcinoma	287	14.1%
Carcinoid/ Neuroendocrine tumor	60	3.0%
Non-small cell carcinoma or other	271	13.3%