Table 1.

Baseline characteristics of participants of the Nambour Skin Cancer Study (n = 1,311) with betaPV antibodies measured in 1992 and/or 1996

N = 1,311, n (%)Person yearsNumber who developed SCC (%)Incidence rate/100.000/person yearsAdjusted HRa
Sex
 M571 (44)5,84571 (12)1,2151.0
 F740 (56)7,80579 (11)1,0120.8 (0.6–1.1)
Age in 1992, y
 <50730 (56)8,19038 (5)4641.0
 50+581 (44)5,459112 (19)2,0524.4 (3.1–6.4)
Skin color
 Olive89 (7)1,0083 (3)2981.0
 Medium499 (38)5,09149 (10)9623.7 (1.2–11.6)
 Fair722 (55)7,53998 (14)1,3005.5 (1.8–17.0)
When exposed to sun
 Only tan144 (11)1,4169 (6)6361.0
 Burn than tan911 (69)9,62788 (10)9141.3 (1.1–4.4)
 Always burn, never tan256 (20)2,59453 (21)2,0435.0 (2.5–9.8)
Occupational sun exposure
 Mainly indoors584 (45)6,26457 (10)9101.0
 Both indoor and outdoor483 (37)4,93862 (13)1,2561.0 (0.7–1.5)
 Mainly outdoors244 (19)2,43631 (13)1,2731.1 (0.7–1.7)
Recreational sun exposure
 Mainly indoors198 (15)2,02918 (9)8871.0
 Both indoor and outdoor573 (44)5,94464 (11)1,0771.4 (0.9–2.4)
 Mainly outdoors540 (41)5,66568 (13)1,2001.2 (0.7–2.1)
Nuchal elastosis
 Limited292 (22)3,3227 (2)2111.0
 Moderate639 (49)6,70963 (10)9392.7 (1.2–6.0)
 Extensive376 (29)3,59878 (21)2,1684.3 (1.9–9.9)
Telangiectasia face
 Low384 (29)4,11330 (8)7291.0
 Moderate628 (48)6,52971 (11)1,0871.1 (07–1.7)
 Extensive294 (23)2,96248 (16)1,6211.3 (0.8–2.2)
Smoker
 Life-long nonsmoker800 (61)8,17178 (10)9551.0
 Current smoker148 (11)1,50815 (10)9951.6 (0.8–3.2)
 Ex-smoker363 (28)3,97057 (16)1,4361.0 (0.6–1.6)

aHR adjusted for age and sex.