Clinical study of NFNC in the treatment of acute exacerbation chronic obstructive pulmonary disease patients with respiratory failure

Table 4 Analysis of infection indicators in the two groups of patients

Group	White blood cell count (109/L)		C-reactive protein (g/L)		Calcitonin (g/L)
	Before treatment	After treatment	Before treatment	After treatment	Before treatment	After treatment
Control group (40)	11.38 ± 1.10	10.41 ± 1.16	23.41 ± 2.27	8.71 ± 1.56	1.57 ± 0.33	3.41 ± 0.32
Therapy group (40)	11.40 ± 1.08	8.44 ± 1.65	23.43 ± 2.25	6.50 ± 1.82	1.55 ± 0.37	5.64 ± 1.15
t	0.082	6.177	0.040	5.831	0.255	11.815
P value	0.935	0.017	0.965	< 0.001	0.799	0.003