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

Table 4 Excess relative 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 relative risk per UVR cumulative radiant exposure (10⁶ J cm^− 2)	p-value^b
Age at exposure (years)
< 25	2.37^c (-4.11^d, 8.85^d)	0.012^c
≥ 25	1.07^c (-3.54^d, 5.68^d)	0.012^c
Time since exposure (years)^e
5–9	− 3.59^c (− 45.0^d, 37.8^d)	0.034^c
10–14	7.11^c (-38.5^d, 52.8^d)
≥ 15	1.58^c (-3.10^d, 6.25^d)

^aAll analysis used models (S4) and (S6) 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
^cindications of lack of convergence
^dWald-based confidence interval
^etime 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

ISSN: 1476-069X