Table 1 Demographic, lifestyle, and skin cancer risk factors in BCC and SCC cases and controls

Age mean (S.D.)

55.6 (11.8)

62.8 (11.9)

<.0001

64.8 (9.6)

<.0001

Age (years)

18–29

9 (2.9)

1 (0.5)

<.0001

1 (0.6)

<.0001

30–39

21 (6.7)

6 (2.8)

2 (1.2)

40–49

55 (17.4)

24 (11.0)

10 (5.9)

50–59

109 (34.5)

46 (21.1)

30 (17.8)

60–69

88 (27.9)

64 (29.4)

68 (40.2)

70–80

34 (10.8)

77 (35.3)

58 (34.3)

Gender

Male

117 (37.0)

133 (61.0)

<.0001

108 (63.9)

<.0001

Female

199 (63.0)

85 (39.0)

61 (36.1)

Ethnicity

Non-Hispanic

280 (88.6)

208 (95.4)

0.003

161 (95.3)

0.0003

Hispanic

32 (10.1)

7 (3.2)

2 (1.2)

Education

≤12 years

32 (10.1)

46 (21.1)

0.0004

36 (21.3)

0.001

>12 years

280 (88.6)

168 (77.1)

129 (76.3)

Smoked 100 cigarettes

Never

161 (50.9)

81 (37.2)

0.002

51 (30.2)

<.0001

Ever

154 (48.7)

134 (61.5)

114 (67.5)

Alcohol consumption

≥ 1 drink in past year

274 (86.7)

177 (81.2)

0.09

130 (76.9)

0.02

No drinks in past year

40 (12.7)

39 (17.9)

35 (20.7)

Eye color

Blue

94 (29.7)

87 (40.0)

0.009

69 (40.8)

0.02

Green

50 (16.1)

24 (11.0)

25 (14.8)

Hazel

52 (16.5)

48 (22.0)

31 (18.3)

Light brown

36 (11.4)

22 (10.1)

18 (10.7)

Dark brown

80 (25.3)

35 (16.1)

22 (13.0)

Hair Color

Black/Brown

245 (77.5)

152 (69.7)

0.04

113 (66.9)

0.02

Blonde/Red

70 (22.2)

65 (29.8)

53 (31.4)

Color of un-tanned skin

White

299 (94.9)

209 (96.3)

0.38

161 (95.3)

0.55

Brown

15 (4.8)

7 (3.2)

6 (3.6)

Cutaneous sensitivity to sunlight exposure

Sunburn with blisters

29 (9.2)

33 (15.1)

0.0001

22 (13.0)

0.005

Sunburn w/o blisters

96 (30.4)

95 (43.6)

71 (42.0)

Mild sunburn/tan

144 (45.6)

65 (29.8)

50 (29.6)

Tan/no change color

44 (13.9)

21 (9.6)

22 (13.0)

Tanning ability to sunlight exposure

It is unable to tan

22 (7.0)

15 (6.9)

0.04

26 (15.4)

<.0001

Tan if you work at it

103 (32.6)

93 (42.7)

77 (45.6)

It tans easily

186 (58.9)

104 (47.7)

62 (37.6)