Table 3.

Analytic methods and findings across studies of common cancers

	Analytic method
	Descriptive analysis			Statistical models
	Period	Age x Period	Age x Cohort	Age	Period	Cohort
Breast (n=5)	++	++	++	++	++*	++
Lung (n=3)		++	+			+
Liver (n=4)	+	+	++		+	+
Bladder (n=3)	++	+	+	++	+*	++
Oral cavity (n=3)	++	+	++		*	+
Esophageal (n=3)	+	+	+	+	++	++
Colorectal (n=3)	+	+	++	++	++	++

+ reported association in at least one study;

++ reported association in two or more studies;

* null findings in at least one study

NOTE: Cancer types for which we identified only one study in our review are not included in the table