Skip to main content

Advertisement

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).