Effects of Aerosol Inhalation Combined with Intravenous Drip of Polymyxin B on Bacterial Clearance, Symptoms Improvement, and Serum Infection Indexes in Patients with Pneumonia Induced by Multidrug-Resistant Gram-Negative Bacteria

Table 3

Comparison of bacterial clearance rates between the two groups on the 3rd, 7th, and 14th days after treatment (n, %).

Group	n	3rd day after treatment	7th day after treatment	14th day after treatment
Observation group	71	39 (54.93)	45 (63.38)	64 (90.14)
Control group	67	34 (50.75)	42 (62.69)	52 (77.61)
χ ^2	—	0.242	0.007	4.038
value	—	0.623	0.933	0.044