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Table 1 Selected characteristics of skin SCC cases and control participating in SEAH study

From: Joint effects of citrus peel use and black tea intake on the risk of squamous cell carcinoma of the skin

  

Cases

Controls

p

  

N = 234

N= 216

 
  

Mean + SD or %

Mean + SD or %

 

Age (mean + SD)

 

66.6 + 10.4

66.2 + 11.1

0.75

Male (%)

 

59.0%

57.9%

0.81

Alcohol a

Yes

78.7%

81.8%

0.53

Smoking :

Never

36.8%

37.5%

 
 

Former

51.7%

46.8%

 
 

Current

11.5%

15.7%

0.36

Hours in Sun d

(h/day)

1.38 + 0.1

1.49 + 0.1

0.35

AK a

Yes

78.2%

37.0%

0.000

Tanning b

Yes

68.8%

81.0%

0.001

Freckles c

NO

50.6%

61.5%

0.005

Citrus peel use:

Yes

30.2%

39.2%

0.045

Hot tea intake:

Yes

26.1%

35.7%

0.028

Iced tea intake

Yes

53.4%

50.0%

0.47

Kcal/day (mean +

SD)

1499.9 + 396.3

1531.8 + 433.5

0.41

Antioxidants (mean + SD)

   

   Retinol (μg/day)

474.5 + 23.2

449.4 + 23.8

0.45

   β-Carotene (μg/day)

92.4 + 7.1

87.6 + 7.8

0.65

   α-Carotene (μg/day)

722.9 + 52.3

777.9 + 63.0

0.50

   Lycopene (μg/day)

5882.9 + 359.7

5440.2 + 419.4

0.42

   α-Tocopherol (mg/day)

7.1 + 1.1

6.4 + 0.5

0.57

   Vitamin C (mg/day)

110.7 + 4.5

109.5 + 4.0

0.84

  1. a: Based on 4–24 hour dietary recalls; b : History of treated actinic keratosis c: Moderate to deep tanning ability after prolonged sun exposure; d: Number of current freckles on the arms; e: Average hours per day during past year spent outside during peak sun expressed as mean (SD).
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BMC Dermatology

ISSN: 1471-5945

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