Open and Closed Endotracheal Suctioning and Arterial Blood Gas Values: A Single-Blind Crossover Randomized Clinical Trial

Table 1

Demographic characteristics (sex, age group) in two groups (OS and CS) in initial grouping.

Variables	Groups
	OS number (%)	CS number (%)	Total number (%)	value
Sex
Male	12 (44.4)	15 (55.6)	27 (64.3)
Female	9 (60.0)	6 (40.0)	15 (23.7)
Age group (year)
30–39	1 (100.0)	0 (0.0)	1 (2.4)
40–49	2 (66.7)	1 (33.3)	3 (7.1)
50–59	7 (58.3)	5 (41.7)	12 (28.6)
60–69	6 (40)	9 (60)	15 (35.7)
≥70	5 (45.5)	6 (54.5)	11 (26.2)
Total	21 (100)	21 (100)	42 (100)

The results of the chi square test.