Table 3 Reference intervals for coagulation tests
From: Reference intervals of complete blood count and coagulation tests in Vietnamese pregnant women
Parameter | First trimester (n = 288) | Second trimester (n = 269) | Third Trimester (n = 279) | ||||||
|---|---|---|---|---|---|---|---|---|---|
2.5th (90% CI) | 97.5th (90% CI) | P1* | 2.5th (90% CI) | 97.5th (90% CI) | P2† | 2.5th (90% CI) | 97.5th (90% CI) | P3‡ | |
PT (seconds) | 10.30 (10.10–10.30) | 12.88 (12.40–13.20) | P1 < 0.001 | 9.80 (9.60–9.90) | 11.60 (11.50–11.90) | P2 < 0.001 | 9.60 (9.30–9.70) | 11.40 (11.20–11.90) | P3 < 0.001 |
APTT (seconds) | 25.40 (22.10–25.60) | 35.46 (34.30–36.60) | P1 < 0.001 | 24.05 (22.40–24.30) | 33.23 (32.60–35.20) | P2 < 0.001 | 23.40 (21.20–23.80) | 31.80 (31.40–33.60) | P3 < 0.001 |
Fibrinogen (mg/dL) | 280.28 (181.40–304.85) | 559.00 (531.93–593.35) | P1 < 0.001 | 347.75 (314.23–366.02) | 593.35 (561.26–616.45) | P2 < 0.001 | 330.28 (261.71–366.83) | 628.56 (604.72–667.32) | P3 < 0.001 |