Table 1.

Descriptive Characteristics of Study Population

	2005	2016
Characteristics	Patients, No. (%)	Patients, No. (%)
Age, years
16 to <21	5,186 (11.0)	4,411 (8.9)
21 to <30	9,524 (20.2)	9,705 (19.6)
30–65	25,667 (54.4)	27,418 (55.4)
>65	6,826 (14.5)	7,976 (16.1)
Race
White	39,632 (84.0)	40,366 (81.5)
Black	1,910 (4.1)	2,932 (5.9)
Asian	2,155 (4.6)	3,110 (6.3)
Other	1,899 (4.0)	2,328 (4.7)
Unknown	1,607 (3.4)	774 (1.6)
Ethnicity
Hispanic	1,796 (3.8)	2,577 (5.2)
Non-Hispanic	43,900 (93.0)	46,266 (93.5)
Unknown	1,507 (3.2)	667 (1.4)
Smoking
Never	28,317 (60.0)	21,637 (43.7)
Past	16,874 (35.8)	25,520 (51.6)
Current	2,012 (4.3)	2,353 (4.8)
Charlson Comorbidity Index
0	39,424 (83.5)	40,423 (81.7)
1–2	5,247 (11.1)	5,685 (11.5)
3–4	1,506 (3.2)	1,835 (3.7)
≥5	1,026 (2.2)	1,567 (3.2)