Cumulative solar ultraviolet radiation exposure and basal cell carcinoma of the skin in a nationwide US cohort using satellite and ground-based measures

Table 3 Excess absolute risk of basal cell carcinoma (BCC) in relation to AVGLO-derived cumulative ultraviolet radiation (UVR) radiant exposure in intervals of age at exposure and time since exposure^a

Group	Excess absolute risk per cumulative UVR radiant exposure (MJ cm^− 2) per 10⁴ person year	p-value^b
Age at exposure (years)
< 25	8.05^c (4.78, 11.1)	0.085^c
≥ 25	19.4^c (8.37, 28.0)	0.085^c
Time since exposure (years)^d
5–9	-36.9^e (-339.0^f, 265.2^f)	0.279^e
10–14	50.7^e (-261.5^f, 362.9^f)
≥ 15	11.8^e (-0.41^f, 23.9^f)

^aAll analysis used models (S5) and (S7) with adjustment to the baseline BCC rate for baseline questionnaire, ln [age], ln [age]², birth year, [birth year]², [birth year]³, [birth year]⁴, [birth year]⁵
^bp-value for heterogeneity by age at exposure/time since exposure
^cweak indications of lack of convergence
^dtime since exposure is the difference in years between the age at which UVR exposure is determined and the age of the individual at a particular instant of follow-up, varying instantaneously with continuing follow-up for that individual
^eindications of lack of convergence
^fWald-based confidence interval

ISSN: 1476-069X