Case Control Study
Copyright ©The Author(s) 2022.
World J Clin Cases. Jul 26, 2022; 10(21): 7265-7274
Published online Jul 26, 2022. doi: 10.12998/wjcc.v10.i21.7265
Table 1 Number of subjects recruited at each center
Center
Experimental group (n = 198)
Control group (n = 201)
Total (n = 399)
Seventh Medical Center of PLA General Hospital09292
First Affiliated Hospital of Nanchang University383270
People’s Hospital of Liaoning Province40040
Cangzhou People’s Hospital314273
Second People’s Hospital of Huai’an393574
Ganyu District People’s Hospital of Lianyungang50050