Results
The patients (n=41) were distributed to the three defined groups of
infection: influenza A-H1N1 (n=27), influenza B-H1N1 (n=10), and
influenza A-H3N2 (n=4). The mean ages in the three influenza groups were
45.7 ± 14.7, 50 ± 15.03, and 46.6 ± 26.65, respectively. There was no
significant difference in mean age between the three groups of influenza
subjects (P=0.7). However, the mean age of B-H1N1 patients was slightly
higher than that of the influenza A-H1N1 and A-H3N2 patients. Overall,
53.7% (22/41) of the patients were male and 46.3% (19/41) were female.
There was no meaningful difference in sex between the three groups of
patients (P=0.2). The demographic and clinical information of the
subjects is summarized in Table 1.
Based on statistical analysis performed on the serological and clinical
manifestations, fever was present in most patients with the various
types of influenza, with no significant difference in its rate of
presence between the three groups (P=0.58). However, as a considerable
finding, the fever temperature was much higher in A-H3N2 subjects (38.9
± 0.18 °C) than in A-H1N1 (38.18 ± 0.29 °C) and B-H1N1 (38.21 ± 0.26 °C)
subjects (P<0.05).
Also, we found a significant difference in the levels of CRP between the
three groups of influenza patients (P=0.03). However, no meaningful
differences were identified in the WBC count or other serological
parameters under study (P>0.05). The serological results of
the patients are summarized in Table 2.
In the chest CT scans, patchy infiltration and middle lobe involvement
were two parameters that had significantly different rates of occurrence
between the three types of influenza strains (P=0.012 and P=0.021,
respectively) (Figure 1). The findings seen on all chest CT scans
included in this study are summarized in Table 3.