Table 6.

Results of the semi-quantitative tests including D-dimer and fibrin degradation products (FDPs).

			CRL	SVR	CTL	Total
D-dimer	<0.5	Count	31	24	11	66
		% within group	88.6	68.6	31.4	62.9
	≥0.5 to <1	Count	4	11	14	29
		% within group	11.4	31.4	40.0	27.6
	≥1 to <2	Count	0	0	6	6
		% within group	0.0	0.0	17.1	5.7
	≥2 to <4	Count	0	0	2	2
		% within group	0.0	0.0	5.7	1.9
	≥4 to <8	Count	0	0	0	0
		% within group	0.0	0.0	0.0	0.0
	≥8	Count	0	0	2	2
		% within group	0.0	0.0	5.7	1.9
Total		Count	35	35	35	105
		% within group	100.0	100.0	100.0	100.0
χ 2(8) = 34.81 a , p = 0.0001
FDP	<5	Count	34	31	23	88
		% within group	97.1	88.6	65.7	83.8
	≥5 to <20	Count	1	4	9	14
		% within group	2.9	11.4	25.7	13.3
	≥20	Count	0	0	3	3
		% within group	0.0	0.0	8.6	2.9
Total		Count	35	35	35	105
		% within group	100.0	100.0	100.0	100.0
χ 2(4) = 15.205 b , p = 0.004

The measurement unit for both tests was micrograms per milliliter.

CTL, control group; SVR, severe group; CRL, critical group.

^aNine cells (60.0%) have expected count less than 5. The minimum expected count is 0.67.

^bSix cells (66.7%) have expected count less than 5. The minimum expected count is 1.00.