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Table 2 PT/INR Measurements

From: Comparison of warfarin therapy clinical outcomes following implementation of an automated mobile phone-based critical laboratory value text alert system

 

Manual Alerts

PHS Alerts

P value

Patients, n

3,497

3,781

 

Dose, Mean ± SD

2.96 ± 1.42

2.98 ± 1.50

0.503

Median

2.5

2.5

 

PT/INR measurements*

N = 30,981

N = 32,297

0.384+

  Mean ± SD

2.02 ± 1.38

2.00 ± 1.28

 

  Median

1.72

1.70

 
 

Number (%)

Number (%)

0.369#

INR < 1.0

1,172 (4)

1,570 (5)

 

1.0-1.4

10,242 (33)

10,809 (33)

 

1.5-1.9

8,137 (26)

8,320 (26)

 

2.0-2.4

5,069 (16)

5,154 (16)

 

2.5-2.9

2,734 (9)

2,776 (9)

 

3.0-3.4

1,397 (5)

1,425 (4)

 

3.5-3.9

717 (2)

751 (2)

 

4.0-4.4

417 (1)

428 (1)

 

4.5-4.9

269 (1)

260 (1)

 

5.0-5.4

198 (1)

182 (1)

 

5.5-5.9

124 (<1)

127 (<1)

 

6.0-6.5

74 (<1)

80 (<1)

 

6.5-6.9

61 (<1)

58 (<1)

 

7.0-7.4

50 (<1)

45 (<1)

 

7.5-8.9

41 (<1)

41 (<1)

 

> 8.0

279 (1)

271 (1)

 
  1. * Including outpatient, inpatient, and ED laboratory results; +Using Mann-Whitney U test; #using Fisher's exact test