M1
Illinois women ages 40–74
2,693,415
Working population denominator · 100%
Illinois · Mammography screening gap · 2024
How many women are unscreened?
We start with all Illinois women ages 40–74, then focus on those who report no mammogram in the past two years. Next, we look separately at their insurance, whether they have a regular healthcare provider, and whether they had a recent routine checkup.
Step 1
Statewide unscreened population estimate
Of all Illinois women ages 40–74, we estimate how many report no mammogram in the past two years.
M2
No mammogram in the past 2 years
≈670,000
24.9% of M1 · BRFSS analytic n = 3,243
Step 2
What care access and contact look like
Every percentage below uses the same M2 population as its starting point.
Read these in parallel—not as a funnel.
The insured, provider, and recent-checkup groups overlap. They must not be multiplied or added together.
M3
Have health insurance
86.5%
≈580,000 women
13.5% uninsured · ≈90,000
M4
Have a personal healthcare provider
83.8%
≈561,000 women
16.2% have none · ≈109,000
M5
Had a routine checkup in the past year
70.7%
≈474,000 women
29.3% did not · ≈196,000
Conservative branch from M5
M6A · unresolved opportunity after contact
Definitely already due when the recent checkup occurred
A conservative timing rule counts only women we can classify as due at any possible point during the previous year. It does not tell us whether screening was discussed, ordered, scheduled, or declined.
≈320,000
67.6% of women in the M5 branch
What this page suggests
Many women with no mammogram in the previous two years are not completely disconnected from healthcare. Most report insurance and a personal provider, and about seven in ten report a recent routine checkup.
What the data cannot show
These data do not observe clinician recommendation, order placement, appointment scheduling, completion, or the woman's decision at the encounter. Those are later operational stages requiring other data.
American Community Survey (ACS)
2024 one-year estimate, Table B01001. Supplies the Illinois population anchor for women ages 40–74.
Open Census sourceBehavioral Risk Factor Surveillance System (BRFSS)
2024 Illinois microdata. Supplies the survey-weighted state percentages for M2–M6A.
Open CDC sourceMethodology status
Point estimates and sample sizes are populated. Confidence-interval fields remain reserved until the complex-survey variance rule is frozen and applied consistently to every pilot state.
Pilot-state placeholder
This state already has a row in state_metrics.csv, but its M1–M6 values have not been populated. The same measurement rules and page layout will be reused once its data are ready.