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Table 1 Patient characteristics

From: Epidemiology and outcomes of previously undiagnosed diabetes in older women with breast cancer: an observational cohort study based on SEER-Medicare

  

Diabetes status at cancer diagnosis

 
 

Overall (N = 2,418)

Previously diagnosed (n = 1,784)

Previously undiagnosed (n = 634)

P-value

 

N

% (SD)

n

% (SD)

n

% (SD)

 

Age at cancer diagnosis (years)

66-70

326

13.5%

234

13.1%

92

14.5%

0.77

71-75

529

21.9%

397

22.3%

132

20.8%

76-80

594

24.6%

437

24.5%

157

24.8%

>80

969

40.1%

716

40.1%

253

39.9%

Mean & (SD) age

77.8

6.9

77.8

7.0

77.7

6.9

Race/ethnicity

White

2,156

89.2%

1,584

88.8%

572

90.2%

0.47

Black

132

5.5%

103

5.8%

29

4.6%

Hispanic

89

3.7%

64

3.6%

25

3.9%

Other

41

1.7%

33

1.8%

8

1.3%

Year of diagnosis

2001

464

19.2%

322

18.0%

142

22.4%

0.05

2002

482

19.9%

347

19.5%

135

21.3%

2003

466

19.3%

347

19.5%

119

18.8%

2004

468

19.4%

363

20.3%

105

16.6%

2005

538

22.2%

405

22.7%

133

21.0%

Stage at diagnosis

In situ

274

11.3%

217

12.2%

57

9.0%

<0.0001

I

920

38.0%

705

39.5%

215

33.9%

II

786

32.5%

579

32.5%

207

32.6%

III

239

9.9%

175

9.8%

64

10.1%

IV

199

8.2%

108

6.1%

91

14.4%

Estrogen (ER) and progesterone (PR) receptor status

ER and PR positive

1,193

49.3%

881

49.4%

312

49.2%

 

ER or PR positive

327

13.5%

238

13.3%

89

14.0%

0.89

ER and PR negative

324

13.4%

244

13.7%

80

12.6%

Unknown/missing

574

23.7%

421

23.6%

153

24.1%

Histologic grade

1

447

18.5%

336

18.8%

111

17.5%

0.61

2

872

36.1%

652

36.5%

220

34.7%

3

696

28.8%

502

28.1%

194

30.6%

4

71

2.9%

49

2.7%

22

3.5%

Unknown/missing

332

13.7%

245

13.7%

87

13.7%

NCI Comorbidity Index

0

1,051

43.5%

627

35.1%

410

64.7%

<0.0001

1

699

28.9%

560

31.4%

145

22.9%

≥ 2

668

27.6%

597

33.5%

79

12.5%

Indicators of poor performance

0

1,169

48.3%

692

38.8%

477

75.2%

<0.0001

≥ 1

1,249

51.7%

1,092

61.2%

157

24.8%

Types of physician visits

Primary care and medical specialist

1,621

67.0%

1,277

71.6%

344

54.3%

<0.0001

Primary care, no medical specialist

381

15.8%

254

14.2%

127

20.0%

Medical specialist, no primary care

226

9.3%

154

8.6%

72

11.4%

Other specialist only

57

2.4%

34

1.9%

23

3.6%

None

133

5.5%

65

3.6%

68

10.7%

Preventive services

0

236

9.8%

123

6.9%

113

17.8%

<0.0001

1

403

16.7%

294

16.5%

109

17.2%

≥ 2

1,779

73.6%

1,367

76.6%

412

65.0%

Percent in census tract with some college

<25%

883

36.5%

656

36.8%

227

35.8%

0.66

≥25%

1,535

63.5%

1,128

63.2%

407

64.2%

Percent in census tract living in poverty

<5%

686

28.4%

509

28.5%

177

27.9%

0.29

5-7%

343

14.2%

255

14.3%

88

13.9%

8-12%

542

22.4%

383

21.5%

159

25.1%

>12%

847

35.0%

637

35.7%

210

33.1%

Type of geographic area

Large metropolitan

1,298

53.7%

952

53.4%

346

54.6%

0.74

Metropolitan

696

28.8%

510

28.6%

186

29.3%

Urban

165

6.8%

125

7.0%

40

6.3%

Less urban/rural

259

10.7%

197

11.0%

62

9.8%

  1. SD: Standard deviation. The NCI Comorbidity Index is based on claims 24 – 4 months before cancer, and excludes two diabetes-related conditions.