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Table 4 Independent and interactive effects of iced black tea consumption and citrus peel use on the risk of skin SCC

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

Intake      OR  
     (95% confidence Interval)   
Citrus Iced Cases Controls   Adjusted for Adjusted for age, gender
Peel black tea No. No. Crude age & gender & SCC risk factors
no no 60 49 1 1 1
no yes 78 62 1.02 (0.62 – 1.69) 1.00 (0.60 – 1.67) 0.91 (0.46 – 1.45)
yes no 16 27 0.48 (0.23 – 0.99) 0.47 (0.22 – 0.99) 0.32 (0.14 – 0.75)
yes yes 47 45 0.85 (0.49 – 1.49) 0.84 (0.48 – 1.50) 0.58 (0.30 – 1.12)
P for trend    0.29 0.30 0.04