: 0--00 hours decreased significantly compared with 00--00 hours (*P* = 0.000) (0--00 hours vs. 00--00 hours, *P* = 0.000; 00--00 hours vs. 00--00 hours, *P* = 0.000; 00--00 hours vs. 00--00 hours, *P* = 0.000; 00--00 hours vs. 00--00 hours, *P* = 0.000; 00--00 hours vs. 00--00 hours, *P* = 0.000).  