Table 1. Baseline characteristics of percutaneous transthoracic needle biopsies of the lung from 2007 to 2015.
| Characteristics | Total | Male | Female | |||
|---|---|---|---|---|---|---|
| N | (%) | N | (%) | N | (%) | |
| Total | 73,132 | (100.0) | 47,936 | (65.5) | 25,196 | (34.5) |
| Age group | ||||||
| 20–49 | 6,356 | (8.7) | 3,258 | (6.8) | 3,098 | (12.3) |
| 50–59 | 13,261 | (18.1) | 7,866 | (16.4) | 5,395 | (21.4) |
| 60–69 | 21,997 | (30.1) | 15,149 | (31.6) | 6,848 | (27.2) |
| 70–79 | 25,136 | (34.4) | 17,539 | (36.6) | 7,597 | (30.2) |
| 80–89 | 6,185 | (8.5) | 4,014 | (8.4) | 2,171 | (8.6) |
| 90+ | 197 | (0.3) | 110 | (0.2) | 87 | (0.3) |
| Insurance status | ||||||
| Health insurance | 68,326 | (93.4) | 45,078 | (94.0) | 23,248 | (92.3) |
| Medical Aid | 4,629 | (6.3) | 2,681 | (5.6) | 1,948 | (7.7) |
| Veterans Health Service | 177 | (0.2) | 177 | (0.4) | 0 | (0.0) |
| Guidancea | ||||||
| Computed tomography guidance | 47,673 | (65.2) | 31,372 | (65.4) | 16,301 | (64.7) |
| Fluoroscopy guidance | 33,337 | (45.6) | 21,800 | (45.5) | 11,537 | (45.8) |
| Year | ||||||
| 2007 | 6,054 | (8.3) | 3,991 | (8.3) | 2,063 | (8.2) |
| 2008 | 6,354 | (8.7) | 4,255 | (8.9) | 2,099 | (8.3) |
| 2009 | 6,931 | (9.5) | 4,621 | (9.6) | 2,310 | (9.2) |
| 2010 | 7,314 | (10.0) | 4,878 | (10.2) | 2,436 | (9.7) |
| 2011 | 8,545 | (11.7) | 5,588 | (11.7) | 2,957 | (11.7) |
| 2012 | 9,287 | (12.7) | 5,974 | (12.5) | 3,313 | (13.1) |
| 2013 | 9,176 | (12.5) | 5,938 | (12.4) | 3,238 | (12.9) |
| 2014 | 9,646 | (13.2) | 6,252 | (13.0) | 3,394 | (13.5) |
| 2015 | 9,825 | (13.4) | 6,439 | (13.4) | 3,386 | (13.4) |
| Medical institution | ||||||
| Superior general hospital | 50,138 | (68.6) | 32,602 | (68.0) | 17,536 | (69.6) |
| General hospital | 22,994 | (31.4) | 15,334 | (32.0) | 7,660 | (30.4) |
| Region | ||||||
| Seoul metropolitan area | 46,066 | (63.0) | 29,360 | (61.2) | 16,706 | (66.3) |
| Urban area | 15,001 | (20.5) | 10,168 | (21.2) | 4,833 | (19.2) |
| Rural area | 12,065 | (16.5) | 8,408 | (17.5) | 3,657 | (14.5) |
a The categories of type of guidance were not mutually exclusive.