Interval Colorectal Cancers following Guaiac Fecal Occult Blood Testing in the Ontario ColonCancerCheck Program

Table 1

Baseline gFOBT screen between April 2008 and December 2009.

	Males	Females
Total baseline FOBT screen participants	138,211/307,456 (44.95%)	169,245/307,456 (55.05%)
Normal result	130,821 (94.65%)	163,508 (96.61%)
Positive result	7,390 (5.35%)	5,737 (3.39%)
Results by age strata
50–54 years
Normal result	38,244/40,300 (94.90%)	50,261/51,885 (96.87%)
Positive result	2,056/40,300 (5.10%)	1,624/51,885 (3.13%)
55–59 years
Normal result	29,869/31,487 (94.86%)	37,463/38,670 (96.88%)
Positive result	1,618/31,487 (5.14%)	1,207/38,670 (3.12%)
60–64 years
Normal result	26,610/28,109 (94.67%)	32,339/33,480 (96.59%)
Positive result	1,499/28,109 (5.33%)	1,141/33,480 (3.41%)
65–69 years
Normal result	20,479/21,687 (94.43%)	24,775/25,703 (96.39%)
Positive result	1,208/21,687 (5.57%)	928/25,703 (3.61%)
70–74 years
Normal result	15,619/16,628 (93.93%)	18,670/19,507 (95.71%)
Positive result	1,009/16,628 (6.07%)	837/19,507 (4.29%)

Difference in percent positive results between males and females in all age strata, .