Table 4.

Correlation of APTT, D-D and PT levels with ABO

Index	Group	n	Maternal ABO			Fetal ABO			Neonatal ABO
			N (%)	χ2	P	N (%)	χ2	P	N (%)	χ2	P
D-D	≥ 0.4 mg/L	24	1 (4.17)	0.013	0.910	3 (12.5)	0.570	0.450	7 (29.17)	4.550	0.033
	< 0.4 mg/L	30	0			1 (3.33)			0
APTT	≤ 26.44 s	23	1 (4.35)	0.023	0.880	2 (8.70)	0.046	0.831	5 (21.74)	1.548	0.213
	> 26.44 s	31	0			2 (6.45)			2 (6.45)
PT	≤ 10.1 s	20	1 (5.00)	0.073	0.786	3 (15.00)	1.201	0.273	6 (30.00)	5.949	0.015
	> 10.1 s	34	0			1 (2.94)			1 (2.94)

Note: APTT, activated partial thromboplastin time; D-D, D-Dimer; PT, prothrombin time; ABO, adverse birth outcomes.