Skip to main content

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