Table 1

Comparison of cases and controls by demographic traits and risk factors

Control (%)BCC (%)SCC (%)
Gender
 Male263 (61.0)281 (56.3)164 (66.7)
 Female168 (39.0)218 (43.7)82 (33.3)
 χ2 P<0.2<0.2
Age
 ≤5080 (18.6)131 (26.3)15 (6.1)
 51–6080 (18.6)100 (20.0)38 (15.5)
 61–70191 (44.3)180 (36.1)121 (49.2)
 >7080 (18.6)88 (17.6)72 (29.3)
 χ2 P<0.02<0.001
Skin typea
 Tans290 (67.6)298 (59.7)134 (54.5)
 Burns139 (32.4)201 (40.3)112 (45.5)
 χ2 P<0.01<0.001
Radiation therapyb
 No397 (92.1)433 (86.8)215 (87.4)
 Yes34 (7.9)66 (13.2)31 (12.6)
 χ2 P<0.01<0.05
Lifetime painful sunburnsc
 0–2262 (61.6)233 (47.2)113 (46.3)
 ≥3164 (38.4)261 (52.8)131 (53.7)
 χ2 P<0.001<0.001
  • a Tendency to tan or burn after initial sun exposure, missing data for two.

  • b IR for NMSC was excluded, n = 13.

  • c Number of lifetime painful sunburns; missing data for 12.