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Table 2 Distribution of select risk factors across categories of nonaspirin nonsteroidal anti-inflammatory drug (NSAID) use among 126,124 women, National Institutes of Health–AARP Study

From: Nonsteroidal anti-inflammatory drugs and breast cancer risk in the National Institutes of Health–AARP Diet and Health Study

 

Frequency of nonaspirin NSAID use in past 12 months

 

None

<weekly

1–6 times/week

1+/day

Characteristic

n

%a

n

%a

n

%a

n

%a

Age at second questionnaire

   <57 years

7,112

14.3

9,185

23.4

4,563

24.0

2,955

17.9

   57–60 years

8,605

17.3

8,288

21.1

4,171

21.9

3,052

18.4

   61–64 years

11,482

23.0

8,854

22.5

4,278

22.5

3,876

23.4

   65–68 years

14,666

29.4

8,841

22.5

4,039

21.2

4,399

26.6

   69+ years

7,962

16.0

4,136

10.5

1,962

10.3

2,263

13.7

Race/ethnicity

   Caucasian/non-Hispanic white

44,909

90.1

35,940

91.4

17,537

92.2

15,103

91.3

   Other/unknown

4,918

9.9

3,364

8.6

1,476

7.8

1,442

8.7

Education

   <High school/high school grad

16,007

33.1

10,402

27.1

5,595

30.3

4,734

29.5

   Post-high school+

32,364

66.9

27,959

72.9

12,851

69.7

11,312

70.5

Body mass index at baseline

   <25 kg/m2

23,279

48.6

18,527

48.6

7,800

42.4

5,418

33.9

   25–30 kg/m2

15,189

31.7

12,423

32.6

6,194

33.7

5,296

33.2

   30+ kg/m2

9,464

19.7

7,193

18.9

4,413

24.0

5,254

32.9

Smoking

   Never

22,702

47.0

17,354

45.5

8,254

44.8

7,062

44.0

   Former

18,554

38.4

15,751

41.3

7,708

41.9

6,942

43.2

   Current

7,025

14.6

5,023

13.2

2,453

13.3

2,050

12.8

Alcoholic drinks

   0 drinks per day

16,225

32.6

9,230

23.5

4,728

24.9

5,121

31.0

   <1 drink per day

27,087

54.4

24,388

62.0

11,660

61.3

9,312

56.3

   1–3 drinks per day

5,108

10.3

4,570

11.6

2,153

11.3

1,616

9.8

   3+ drinks per day

1,407

2.8

1,116

2.8

472

2.5

496

3.0

Self-reported general health

   Excellent/very good/good

42,891

87.5

35,824

92.4

16,655

88.8

13,073

80.5

   Fair/poor

6,142

12.5

2,966

7.6

2,106

11.2

3,176

19.5

Stroke

   No

48,762

97.9

38,882

98.9

18,760

98.7

16,223

98.1

   Yes

1,065

2.1

422

1.1

253

1.3

322

1.9

Heart disease

   No

44,964

90.2

36,916

93.9

17,658

92.9

14,936

90.3

   Yes

4,863

9.8

2,388

6.1

1,355

7.1

1,609

9.7

High blood pressure

   No

27,666

59.6

23,960

65.1

10,656

60.1

8,036

51.7

   Yes

18,783

40.4

12,847

34.9

7,080

39.9

7,508

48.3

Mammogram in past 3 years

   Once or less

17,403

35.3

10,768

27.6

5,095

27.0

4,509

27.5

   Yes, more than once

31,949

64.7

28,229

72.4

13,749

73.0

11,904

72.5

Age at menarche

   <13 years

23,714

48.1

18,717

48.0

9,436

50.0

8,816

53.7

   13–14 years

21,018

42.6

16,749

43.0

7,752

41.1

6,269

38.2

   15+ years

4,604

9.3

3,516

9.0

1,685

8.9

1,336

8.1

Parity

   Nulliparous

8,010

16.4

5,540

14.3

2,375

12.7

2,212

13.6

   One

5,330

10.9

4,022

10.4

1,794

9.6

1,546

9.5

   Two

12,441

25.5

10,535

27.2

5,125

27.3

4,095

25.2

   Three or more

23,059

47.2

18,566

48.0

9,445

50.4

8,418

51.7

Age at first live birth

   Nulliparous

8,010

16.4

5,540

14.3

2,375

12.6

2,212

13.6

   <20 years

7,690

15.7

6,056

15.6

3,559

19.0

3,229

19.8

   20–24 years

21,059

43.0

17,194

44.4

8,585

45.7

7,350

45.1

   25–29 years

9,058

18.5

7,520

19.4

3,310

17.6

2,676

16.4

   30+ years

3,153

6.4

2,439

6.3

948

5.0

844

5.2

Age at menopause

   Premenopausal

1,145

2.3

1,864

4.7

886

4.7

487

2.9

   <45 years

3,654

7.3

2,377

6.0

1,063

5.6

995

6.0

   45–49 years

8,216

16.5

5,941

15.1

2,732

14.4

2,288

13.8

   50–54 years

14,355

28.8

11,383

29.0

4,705

24.7

3,895

23.5

   55+ years

3,209

6.4

2,519

6.4

1,019

5.4

945

5.7

   Surgical menopause

17,713

35.5

13,938

35.5

7,962

41.9

7,430

44.9

Postmenopausal, age unknown

1,535

3.1

1,282

3.3

646

3.4

505

3.1

Hormone therapy formulation

   Never used

23,083

48.6

14,199

37.8

5,961

32.9

5,179

32.8

   Estrogen therapy only

12,664

26.7

10,499

27.9

5,910

32.7

5,522

35.0

   Estrogen–progestin therapy

11,762

24.8

12,876

34.3

6,224

34.4

5,072

32.2

Moderate/vigorous physical activity during past 10 years

   Never

1,922

3.9

1,004

2.6

551

2.9

749

4.6

   Rarely

5,434

11.1

3,953

10.2

1,993

10.6

2,032

12.5

   <1 hour/week

5,034

10.3

4,196

10.8

1,980

10.6

1,815

11.2

   1–3 hours/week

12,127

24.8

10,252

26.4

4,815

25.7

4,091

25.2

   4–7 hours/week

12,378

25.3

10,169

26.2

4,981

26.6

3,924

24.1

   >7 hours/week

12,017

24.6

9,234

23.8

4,397

23.5

3,642

22.4

Number breast biopsies

   None

37,903

76.9

29,547

75.9

14,113

74.9

12,243

74.7

   One

7,549

15.3

6,236

16.0

3,114

16.5

2,727

16.6

   Two

2,042

4.1

1,779

4.6

884

4.7

768

4.7

   Three or more

1,793

3.6

1,373

3.5

743

3.9

652

4.0

Family history of breast cancer in first degree relative (male or female)

   No

33,976

83.6

27,478

83.7

13,197

83.8

11,295

82.8

   Yes

6,643

16.4

5,346

16.3

2,554

16.2

2,347

17.2

  1. aMissing values were excluded from percentage calculations.