Results
The present study was conducted on 72 subjects in two groups of intervention (n = 35) and control (n = 37) with participants who met the inclusion criteria. During the study, 8 subjects (3 in the study group and 5 in the control group) not meeting the inclusion criteria were excluded and the study was conducted on 32 subjects in the study and control groups. Mean ages of the subjects in suctioning intervention and control groups were 50.96 (18.7) and 49.50 (17.9) years, respectively. Subjects’ intubation lengths in the study and control groups were 3.12 (0.8) and 3.12 (0.9) days, respectively. About 53% of the subjects were male and 47% were female. The cause of hospitalization was internal (29%), surgical (31%), and internal–surgical (40%). Most of the subjects had history of non-pulmonary diseases (45%) and were non-smokers (70%). No subjects had a history of immune system defect. Independent t-test and Chi-square test showed no significant difference in subjects’ age, intubation length, sex, hospitalization cause, disease history, history of smoking, and immune system defect before intervention (P > 0.05) [Table 2]. Repeated measure ANOVA showed a significant difference in the trend of Modified Pulmonary Infection Clinical Scale score changes in the study and control groups (P < 0.05), but the difference was not significant between groups (P > 0.05). Independent t-test showed no significant difference in the mean scores of Modified Pulmonary Infection Clinical Scale before intervention and on the third and the fourth days after intervention, as both the groups showed similar changes (P < 0.05). Meanwhile, mean score of Modified Pulmonary Infection Clinical Scale was significantly lower on the fifth day after intervention in the study group, compared to the control group (P < 0.05) [Table 3].
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