TABLE 3

APC for Anatomic Site of Melanoma and UV-B Exposure by Age at Diagnosis

0–9 y10–14 y15–19 y
nAPCa,b (95% CI)nAPCc (95% CI)nAPCc (95% CI)
All sites1042.5% (–0.4 to 5.4)1842.9% (1.0 to 4.7)*9421.9% (1.2 to 2.5)*
 C44.3: Skin of other/unspecified parts of face14−2.8% (–6.2 to 0.8)173.8% (–2.2 to 10.1)523.5% (–0.3 to 7.5)
 C44.5: Skin of trunk173.1% (–1.3 to 7.6)631.8% (–2.7 to 6.6)3563.0% (1.6 to 4.4)*
 C44.7: Skin of lower limb and hip221.0% (–4.4 to 6.8)343.3% (0.7 to 6.0)*2172.5% (1.2–3.8)*
UV-B exposure
 Low622.7% (–0.9 to 6.4)1104.6% (1.9 to 7.3)*5163.3% (2.2 to 4.4)*
 Highc422.1% (–1.2 to 5.5)740.4% (–2.0 to 2.9)1664.5% (–0.6 to 9.9)d
260–1.5% (–2.9 to 0.1)e*
  • All data are 1973–2009 except as noted.

  • a APCs analyzed using 5-y intervals due to small numbers (1973–1977, 1978–1982, 1983–1987, 1988–1992, 1993–1997, 1998–2002, 2003–2009).

  • b APC was calculated via weighted least-squares regression.

  • c Best fit model contained 1 joinpoint. APC (0 joinpoint), 0.03%; 95% CI, –1.8 to 1.7.

  • d Years 1973–1985.

  • e Years 1985–2009.

  • * Indicates statistical significance at the .05 level.