a trend toward significanceP = .05
47 There was also a trend toward significance for reduction in the length of hospital stay of 0.4 days favoring the CPAP group (CPAP vs no-CPAP: 4.0 ± 4 vs 4.4 ± 8 days, P = .05). 47 Even though five studies supported the use of CPAP in the perioperative period, they were not included in the meta-analysis by Nagappa et al 47 ( Table 2 ), because of a lack of data in either the study group and/or control group.