Table 1.

Patient demographics at the time of index CT scan (n=950 patients).

Characteristic	Number of Encounters
General Demographics
Mean age in years (range)	73 (36–99)
Sex
Men	362 (38.1%)
Women	588 (61.9%)
Race
African American	35 (3.7%)
Asian	23 (2.4%)
White	803 (84.5%)
Native Hawaiian or Other Pacific Islander	2 (0.2%)
Other	52 (5.5%)
Unknown	35 (3.7%)
Ethnicity
Not of Spanish/Hispanic Origin	586 (61.7%)
Spanish/Hispanic Origin	21 (2.2%)
Unknown	343 (36.1%)
Smoking Status*
Current every day/ Heavy smoker	42 (4.4%)
Current some day/ Light smoker	18 (1.9%)
Former smoker	473 (49.8%)
Smoker, current status unknown	1 (0.1%)
Passive smoke exposure	4 (0.4%)
Never smoker	350 (36.8%)
Unknown	62 (6.5%)

^*Represented categories are the available choices in the electronic health record for specifying smoking history