Table 3. Relative excess risk (RER) for elderly (65 years and older) vs young patients, stratified according to Breslow category and lesion location.

Stratification	Adjusted RERa elderly vs young	P -value (adjusted a )
Breslow thickness
⩽1.0 mm	1.9 (1.4–2.6)	<0.001
1.0–2.0 mm	1.6 (1.3–2.0)	<0.001
2.0–4.0 mm	1.6 (1.4–1.9)	<0.001
>4.0 mm	1.7 (1.5–1.9)	<0.001
Location
Head and neck	1.7 (1.5–2.0)	<0.001
Trunk	1.7 (1.5–1.8)	<0.001
Upper extremities	1.5 (1.3–1.8)	<0.001
Lower extremities	2.0 (1.8–2.4)	<0.001

^aAdjusted for sex, year, N, M, Breslow thickness, and location (when not stratified for that factor).