Basal cell carcinoma risk and solar UV exposure in occupationally relevant anatomic sites: do histological subtype, tumor localization and Fitzpatrick phototype play a role? A population-based case-control study

Table 5 Association of UV exposure and risk for BCC in cases with histopathological subtypes nodular, sclerodermiform or superficial and matched controls (n = 576 in each group)

UV exposure	Cases^a	Contr.^a	OR^b	(95% - CI)^b	p	OR^c	(95% - CI)^c	p
Total UV exposure (leisure time and occupational exposure)
< 20th percentile (< 8985.0 SED)	107	132	Ref.	Ref.	Ref.	.	.	.
20. - < 40th percentile (8985.0 - 10,632.6 SED)	117	119	1.74	0.98–3.10	0.058	.	.	.
40th - < 60th percentile (10,632.7 - 12,565.6 SED)	125	118	1.71	0.99–2.94	0.053	.	.	.
60th - < 90th percentile (12,565.7 - 18,006.7 SED)	170	160	1.87	1.10–3.18	0.021	.	.	.
≥ 90th percentile (≥ 18,006.8 SED)	57	47	2.27	1.17–4.42	0.016	.	.	.
Total UV exposure (high versus moderate exposure)
40th - < 60th percentile (10,632.7 - 12,565.6 SED)	125	118	Ref.	Ref.	Ref.	.	.	.
≥ 90th percentile (≥ 18,006..8 SED)	57	47	1.33	0.78–2.26	0.292	.	.	.
Occupational UV exposure
< 44th percentile (< 2.9 SED)	251	264	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
44th - < 60th percentile (2.9–532.1 SED)	78	101	0.98	0.64–1.51	0.933	0.98	0.63–1.52	0.931
60th - < 90th percentile (532.2–5870.4 SED)	183	173	1.13	0.80–1.58	0.49	1.13	0.80–1.58	0.49
≥ 90th percentile (≥ 5870.5 SED)	64	38	1.98	1.14–3.44	0.015	1.98	1.14–3.44	0.015
Occupational UV exposure (high versus moderate exposure)
44th - < 60th percentile (2.9–532.1 SED)	78	101	Ref.	Ref.	Ref.	Ref.	Ref.	Ref.
≥ 90th percentile (≥ 5870.5 SED)	64	38	2.02	1.09–3.74	0.026	2.02	1.09–3.75	0.026

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