Table 1.

Comparison of various coagulation parameters and age of COVID-19 patients in accordance with disease severity

Clinical status	Age	PT	INR	APTT	Ddimer	FDP	FIB	TT	PLT
Mild moderate
Mean	40.45	13.89	1.08	30.28	1002.57	6.37	463.16	18.45	213.50
N	273	273	273	273	273	273	273	273	273
Std. deviation	15.36	2.41	.23	4.58	1317.36	6.83	164.33	3.15	49.77
Severe
Mean	48.60	15.06	1.20	30.10	3324.25	13.92	548.20	18.78	204.73
N	79	79	79	79	79	79	79	79	79
Std. deviation	16.34	3.12	.32	3.31	4542.37	15.96	193.88	3.57	46.59
Very severe
Mean	57.62	16.52	1.34	30.42	5585.05	23.88	599.25	19.94	201.66
N	39	39	39	39	39	39	39	39	39
Std. deviation	13.08	5.22	.57	6.64	5507.67	20.91	257.04	3.81	60.54
P value	< 0.001	< 0.001	< 0.001	0.928	< 0.001	< 0.001	< 0.001	0.03	0.20
Total
Mean	43.81	14.39	1.14	30.26	1928.73	9.64	493.92	18.67	210.55
N	391	391	391	391	391	391	391	391	391
Std. deviation	16.32	3.06	.31	4.60	3259.51	12.55	187.51	3.33	50.40

*Normal reference range; Fibrinogen: 200–400 mg/ml, D dimer: < 500 ng/ml, FDP: < 5 µg/ml, Platelet count: 1.5–4.5 lacs/mm³, PT: 11–15 s, APTT: 24–36 s, INR: 1.01, TT: 14–20 s