Table 2.

Overall operational characteristics of included studies by cancer site

Site of cancerNumber of studiesNumber screening exams per program: mean (min, max)Region of operations (% rural, urban, mixed)Percent organized screening, % (n)
Breast5521,223 (141–214,328)24% rural/20% urban/56% mixed40% (19)
Cervical124,954 (85–19,961)46% rural/54% both17% (2)
Colon1100% rural0%
Multiphasic101,994 (182–5,232)18% rural/9% urban/64% mix18% (2)
Total7814,069 (85–214,328)29% rural/10% urban/57% mix28% (22)