Retrospective analysis of influencing factors on the efficacy of mechanical ventilation in severe and critical COVID-19 patients

Table 2 Related test results of patients before and after ventilation

Item	Death group, 17 cases			Effective group, 10 cases
	On admission	Before ventilation	Before death	On admission	Before ventilation	Before discharge
Lactic acid	2.44 ± 1.07	5.82 ± 6.27	17.41 ± 7.10b	2.00 ± 0.12	2.00 ± 0.12	2.00 ± 0.12
IL-6	347.53 ± 922.41a,b	125.76 ± 139.63a,b	12099.43 ± 19424.47a,b	2.36 ± 1.75	1.50 ± 1.22	1.00 ± 0.89
CRP	123.20 ± 94.63	151.02 ± 82.27	129.23 ± 86.94	6802.48 ± 9458.94a,b	854.56 ± 1322.69a,b	878.56 ± 1251.27a,b
Blood glucose	8.45 ± 4.37	10.97 ± 5.91	10.38 ± 5.83	12.72 ± 9.76	126.03 ± 146.14a,b	135.51 ± 158.42a,b
PLT	151.00 ± 83.35b	171.13 ± 103.79	96.27 ± 97.446	14.86 ± 13.02	70.27 ± 13.06	77.74 ± 15.31
D-Dimer	13.38 ± 30.23	17.18 ± 30.18	13.06 ± 17.51	4.21 ± 3.70	2.30 ± 1.64	49.5 ± 41.95
BNP	250.36 ± 349.23a,b	753.91 ± 1323.52a,b	1410.28 ± 1806.89a,b	1.0 ± 0.12	1.40 ± 0.52	1.90 ± 0.32
Cr	81.70 ± 39.82	78.75 ± 34.44	105.81 ± 55.53b	65.32 ± 41.76	49.94 ± 59.33	1.18 ± 2.65
Lymphocyte	1.04 ± 1.34	0.57 ± 0.45	0.55 ± 0.50	1.46 ± 2.09	1.45 ± 1.60	1.04 ± 1.09
Lymphocyte/granulocyte ratio (%)	16.58 ± 29.10	4.58 ± 3.87	7.15 ± 7.47	57.37 ± 42.08	273.06 ± 109.09a,b	79.4 ± 25.15b

^aP < 0.05 (in same group).

^bP < 0.05 (between two groups).