Table 1.
Demographic characteristics of non-progressive carcinoma in situ (CIS), multiple CIS, and high-risk CIS. The non-progressive CIS cohort was defined by patients with only one record of a melanoma CIS. The multiple CIS cohort was defined by patients with a CIS record followed by a second diagnosis of CIS in a later year. The high-risk CIS cohort was defined by patients with one or multiple CIS records followed by a diagnosis of melanoma in a later year.
| Measure | Non-Progressive CIS (n = 57,680) | Multiple CIS (n = 7392) | High-Risk CIS (n = 5875) | |
|---|---|---|---|---|
| Demographic characteristics | Sex (male, %) | 29,910 (51.9) | 4607 (62.3) | 4010 (68.3) |
| Age (years, %) | ||||
| 0–19 | 275 (0.5) | 1 (<0.1) | 3 (<0.1) | |
| 20–39 | 6895 (12.0) | 293 (6.4) | 261 (4.4) | |
| 40–59 | 20,998 (36.4) | 2078 (45.1) | 1597 (27.2) | |
| 60–79 | 22,888 (39.7) | 4200 (91.2) | 3254 (55.4) | |
| 80+ | 6555 (11.4) | 820 (17.8) | 760 (12.9) | |
| Unknown | 69 (0.1) | — | — | |
| Year of diagnosis (Median, IQR) | 2008 (2002–2012) | 2008 (2001–2013) | 2006 (2000–2011) |