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Table 1 Frequency distribution of cases and matched population controls (number and percentage)

From: Prescriptions for selective cyclooxygenase-2 inhibitors, non-selective non-steroidal anti-inflammatory drugs, and risk of breast cancer in a population-based case-control study

Characteristic

 

Cases*

Controls*

 

P-value

N = 8,195

%

N = 81,950

%

Selective Cox-2 Inhibitors

0.007

    

   No

 

7,362

89.8

74,360

90.7

   Yes

 

701

8.6

6,314

7.7

Non-selective Non-aspirin

0.02

    

Non-Steroidal Anti- Inflammatory Drugs

     

   No

 

6,361

77.6

64,549

78.8

   Yes

 

1,834

22.4

17,401

21.2

Low Dose Aspirin

0.93

    

   No

 

7,414

90.5

74,115

90.4

   Yes

 

781

9.5

7,835

9.6

High Dose Aspirin

0.28

    

   No

 

8,168

99.7

81,733

99.7

   Yes

 

27

0.3

217

0.3

Acetaminophen

0.64

    

   No

 

7,317

89.3

73,033

89.1

   Yes

 

878

10.7

8,917

10.9

Rheumatoid Arthritis

0.70

    

   No

 

7,640

93.2

76,490

93.3

   Yes

 

555

6.8

5,460

6.7

Migraine

0.002

    

   No

 

7,797

95.1

78,571

95.9

   Yes

 

398

4.9

3,379

4.1

Hormone Replacement Therapy

<0.001

    

   Never

 

6,248

76.2

66,132

80.7

   Ever

 

1,947

23.8

15,818

19.3

  1. *Matched on county of residence and birth year