Case Control Study
Copyright ©The Author(s) 2020.
World J Clin Cases. May 6, 2020; 8(9): 1592-1599
Published online May 6, 2020. doi: 10.12998/wjcc.v8.i9.1592
Figure 3
Figure 3 Retention time of the ventilation tube. The tympanostomy tube retention time of the treatment group was significantly longer than that of the control group. aP < 0.01.