Table 2.

Average changes in aPTT in renal transplant and nontransplant patients receiving heparin

Changes	Transplant (n = 29)	Nontransplant (n = 29)
Average aPTT, seconds	72.6 ± 43.1	78.1 ± 50.6
Average highest aPTT/patient, seconds	157.4 ± 59.8	147.3 ± 74.4
Patients with >1 supratherapeutic aPTT, %	86	69
Supratherapeutic aPTTs/patient, seconds*	2.86 (range, 0–7)	1.79 (range, 0–11)
Total aPTTs/patient, seconds*	14.1 (range, 2–52)	7.6 (range, 1–47)
Average (range) heparin duration, days	7 ± 4.5 (range, 2–25)	4.7 ± 4.5(range, 1–26)

Note: Student t test was performed for normally distributed categorical data, and Mann-Whitney was performed for non-normally distribute categorical data. To calculate percent of patients with at least one supratherapeutic aPTT, the Fisher exact probability test was performed.

*P < .05.