Retrospective Study
Copyright ©The Author(s) 2021.
World J Clin Cases. Jul 26, 2021; 9(21): 5840-5849
Published online Jul 26, 2021. doi: 10.12998/wjcc.v9.i21.5840
Table 2 Comparison of sputum suction with negative pressure between the two groups, n (%)
Group
n
Yes
No
Refined care6114 (22.95)47 (77.05)
Control5926 (44.07)33 (55.93)
χ26.018
P value0.014