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Table 2 Normal range calculated using samples from 60 health volunteers

From: Comparison of different laboratory tests in the evaluation of hemorrhagic risk of patients using rivaroxaban in the critical care setting: diagnostic accuracy study

Tests

Lower limit (90% confidence interval)

Upper limit (90% confidence interval)

PT (seconds)

12.6 (12.37–12.85)

15.2 (14.96–15.44)

aPTT (seconds)

26.8 (26.1–27.5)

35.6 (34.7–36.6)

dRVVT screen (seconds)

36.5 (36.2–36.9)

40.2 (39.9–40.6)

dRVVT confirm (seconds)

35.3 (34.8–35.8)

41.0 (40.4–41.5)