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Table 1 UVB estimate in association with crude incidence rate of CRC using polynomial regression for countries in northern hemisphere

From: Could age increase the strength of inverse association between ultraviolet B exposure and colorectal cancer?

Age groups

Regression Coefficient

P-value

(overall)

R2

(overall)

UVB

UVB^2

>/= 75 years

− 0.49

− 0.004

<  0.001

0.62