Table 1 Relationship between demographic, clinical, and healthcare factors and breast cancer detection mode

Demographic factors

Age*

 39-

661

0

(0)

661

(100)

 40–49

2660

838

(31.5)

1822

(68.5)

 50–69

6046

2857

(47.3)

3189

(52.7)

 70–74

1056

487

(46.1)

569

(53.9)

 75+

1950

565

(29.0)

1385

(71.0)

Neighborhood Income Quintile*

  > 80 %

2694

1121

(41.6)

1573

(58.4)

 60 % ~ 80 %

2388

922

(38.6)

1466

(61.4)

 40–60 %

2547

967

(38.0)

1580

(62.0)

 20 % ~ 40 %

2443

911

(37.3)

1532

(62.7)

  < 20 %

2247

809

(36.0)

1438

(64.0)

 Missing

54

17

(31.5)

37

(68.5)

Clinical factors

Stage*

 In Situ

1588

967

(60.9)

621

(39.1)

 I

4803

2440

(50.8)

2363

(49.2)

 II

3821

1017

(26.6)

2804

(73.4)

 III

1489

230

(15.4)

1259

(84.6)

 IV

405

43

(10.6)

362

(89.4)

 Missing

267

50

(18.7)

217

(81.3)

Histological Grade*

 Well differentiated

2359

1165

(49.4)

1194

(50.6)

 Moderately differentiated

4976

1977

(39.7)

2999

(60.3)

 Poorly or undifferentiated

4408

1331

(30.2)

3077

(69.8)

 Unknown/Not stated/Not applicable

630

274

(43.5)

356

(56.5)

Charlson Comorbidity Index*

 0

8961

3507

(39.1)

5454

(60.9)

 1

2348

912

(38.8)

1436

(61.2)

  > =2

1064

328

(30.8)

736

(69.2)

Healthcare factors

Time Period*

 2004–2006

5004

1732

(34.6)

3272

(65.4)

 2007–2010

7369

3015

(40.9)

4354

(59.1)

Usual Provider Continuity*

 High continuity (>0.75)

5037

2104

(41.8)

2933

(58.2)

 Low continuity (<=0.75)

5731

2139

(37.3)

3592

(62.7)

 Minimum doctor visits

1605

504

(31.4)

1101

(68.6)

Community Size and Metropolitan Influence Zone*

 Urban

9741

3872

(39.7)

5869

(60.3)

 Rural

2632

875

(33.2)

1757

(66.8)