Effects of 30% vs. 60% inspired oxygen fraction during mechanical ventilation on postoperative atelectasis: a randomised controlled trial

Table 2 The percentage of atelectasis volume handled by multiple imputation (5 imputations datasets)

Multiple imputation	Group	n	mean ± SD	differences (95% CI)	T	P value
Imputation − 1	30% FiO₂	60	1.79 ± 0.75	-0.25 (-0.58, 0.07)	-1.545	0.125
Imputation − 1	60% FiO₂	60	2.04 ± 1.02	-0.25 (-0.58, 0.07)	-1.545	0.125
Imputation − 2	30% FiO₂	60	1.79 ± 0.74	-0.30 (-0.63, 0.03)	-1.786	0.077
Imputation − 2	60% FiO₂	60	2.09 ± 1.06	-0.30 (-0.63, 0.03)	-1.786	0.077
Imputation − 3	30% FiO₂	60	1.79 ± 0.75	-0.23 (-0.56, 0.09)	-1.451	0.150
Imputation − 3	60% FiO₂	60	2.02 ± 1.00	-0.23 (-0.56, 0.09)	-1.451	0.150
Imputation − 4	30% FiO₂	60	1.78 ± 0.78	-0.24 (-0.57, 0.08)	-1.477	0.143
Imputation − 4	60% FiO₂	60	2.02 ± 1.00	-0.24 (-0.57, 0.08)	-1.477	0.143
Imputation − 5	30% FiO₂	60	1.78 ± 0.76	-0.25 (-0.57, 0.07)	-1.543	0.126
Imputation − 5	60% FiO₂	60	2.03 ± 1.00	-0.25 (-0.57, 0.07)	-1.543	0.126

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