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 2

Comparison of clinical efficacy between the two groups of patients (n, %).

Group	Number of cases	Significant effect	Effective	Invalid	Total efficiency
Observation group	44	31 (70.45)	11 (25.00)	2 (4.55)	42 (95.45)
Control group	40	22 (55.00)	10 (25.00)	8 (20.00)	32 (80.00)
χ ^2	—				4.772
value	—				0.029