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. 2012 Apr 24;7(4):e34422. doi: 10.1371/journal.pone.0034422

Table 1. Demographic and Skin Characteristics of Cases with Squamous Cell Carcinoma and Controls.

Cases with SCC (n = 55) Controls (n = 41) P-value
Age (mean years ± sd) 74.5 69.9 0.02
Age 0.08
 <70 17 (31%) 21 (51%)
 70–79 21 (38%) 11 (27%)
 ≥80 17 (31%) 9 (22%)
Female Gender 2 (4%) 5 (12%) 0.13
Ever Smoker 42 (76%) 31 (76%) 0.93
Family Hx of Skin Cancer 10 (20%) 5 (13%) 0.39
Propensity to Sunburn 48 (87%) 25 (61%)* 0.003
Propensity to Sunburn 0.001
 Burns, blisters 14 (25%) 5 (12%)*
 Burns, no blisters 18 (33%) 4 (10%)
 Mild burn, tans 16 (29%) 16 (39%)
 No burn, tans 4 (7%) 13 (32%)
 No burn, no tan 3 (5%) 3 (7%)