Table 2. Lung Ultrasound Scores and Diaphragm Excursion.

Variable	Propofol group (n = 54)	Propofol-ketamine group (n = 53)	Relative risk (95% CI) or median difference (95% CI)a	P value
Atelectasis, No. (%)	48 (88.9)	31 (58.5)	0.7 (0.5 to 0.8)	<.001
Total lung scoreb (range, 0-84), median (IQR)	6 (3 to 10)	2 (0 to 4)	4.0 (2.0 to 5.0)	<.001
B-line (B) scorec (range, 0-42), median (IQR)	2 (0 to 4)	0 (0 to 0)	1.0 (0.0 to 2.0)	.001
Consolidation (C) scored (range, 0-42), median (IQR)	4 (1 to 6)	1 (0 to 2)	2.0 (1.0 to 3.0)	<.001
Diaphragm excursion, mean (SD), mm	6.09 (2.33)	5.89 (2.25)	0.2 (−0.7 to 1.1)	.66

^a Continuous variables are reported as median or mean difference (95% CI), whereas categorical variables are reported as relative risk (95% CI).

^b The total lung score was calculated as the sum of the C and B scores.

^c The degree of B-lines (B score) was graded from 0 to 3 as follows: 0, fewer than 3 isolated B-lines; 1, multiple B-lines; 2, multiple coalescent B-lines; and 3, white lungs.

^d The degree of juxtapleural consolidation (C score) was graded from 0 to 3 as follows: 0, no consolidation; 1, minimal consolidation; 2, small consolidation; and 3, large consolidation.