Sunlight exposure during leisure activities and risk of prostate cancer in Montréal, Canada, 2005–2009

BMC Public Health

Table 3 ORs (95% CI) ^† for the association between leisure-time sunlight exposure prostate cancer, PROtEuS, Montreal, Canada

	1,904 controls		All prostate cancers			Non-aggressive prostate cancers^b			Aggressive prostate cancers^c
	1,904 controls		1,904 cases and 1,962 controls			1,384 cases and 1,962 controls			512 cases and 1,962 controls
Sunlight exposure index	n	(%)	n	(%)	OR (95% CI)^a	n	(%)	OR (95% CI)^a	n	(%)	OR (95% CI)^a
*CEvents* ^d
None	52	(2.7)	55	(2.9)	1.32 (0.82-2.14)	35	(2.5)	1.29 (0.76-2.20)	19	(3.7)	1.53 (0.79-2.87)
Q1	478	(24.4)	506	(26.6)	1.11 (0.90-1.37)	377	(27.2)	1.12 (0.89-1.41)	128	(25.0)	1.09 (0.79-1.50)
Q2	477	(24.3)	438	(23.0)	0.91 (0.74-1.11)	332	(24.0)	0.94 (0.75-1.17)	105	(20.5)	0.84 (0.61-1.14)
Q3	477	(24.3)	474	(24.9)	1.00 (0.82-1.22)	324	(23.4)	0.92 (0.73-1.15)	146	(28.5)	1.19 (0.89-1.59)
Q4	478	(24.4)	431	(22.6)	1.00 (reference)	316	(22.8)	1.00 (reference)	114	(22.3)	1.00 (reference)
					p-trend = 0.56			p-trend = 0.57			p-trend = 0.58
*CDuration* ^e
None	52	(2.7)	55	(2.9)	1.38 (0.86-2.23)	35	(2.5)	1.41 (0.83-2.41)	19	(3.7)	1.41 (0.73-2.65)
Q1	478	(24.4)	483	(25.4)	1.10 (0.89-1.37)	363	(26.2)	1.18 (0.93-1.49)	118	(23.0)	0.92 (0.67-1.26)
Q2	477	(24.3)	467	(24.5)	0.99 (0.81-1.22)	333	(24.1)	1.00 (0.79-1.25)	134	(26.2)	0.99 (0.73-1.33)
Q3	476	(24.3)	489	(25.7)	1.13 (0.92-1.39)	366	(26.4)	1.20 (0.96-1.50)	119	(23.2)	0.95 (0.70-1.28)
Q4	479	(24.4)	410	(21.5)	1.00 (reference)	287	(20.7)	1.00 (reference)	122	(23.8)	1.00 (reference)
					p-trend = 0.38			p-trend = 0.30			p-trend = 0.66

^†Odds ratios and 95% confidence intervals. ^aAdjusted for age, first-degree family history of prostate cancer, ancestry, timing of last prostate cancer screening, education, BMI, solar protection during leisure and overall physical activity level. ^bProstate cancer cases with a Gleason score of 6 or lower or of 7 with a primary score of 3. ^cProstate cancer cases with Gleason score of 7 with a primary score of 4 or 8 or higher. ^dCumulative number of events entailing sunlight exposure from age 18 years to age at diagnosis for cases or age at interview for controls (levels: none: 0 event, Q1: 1 to 3,210 events, Q2: 3,211 to 6,642 events, Q3: 6,643 to 13,679 events, Q4: 13,680 to 94,886.67 events). ^eCumulative duration of leisure-time exposure to sunlight from age 18 years to age at diagnosis for cases or age at interview for controls (levels: none: 0 hour, Q1: 1 to 4,497 hours, Q2: 4,498 to 9,711 hours, Q3: 9,712 to 18,459 hours, Q4: 18,460 to 103,484 hours).

ISSN: 1471-2458