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. 2011 Dec 20;6(6):371–376. doi: 10.1186/2049-6958-6-6-371

Table 2.

Relationships between ultrasonography (USG) and patient and disease characteristics

Factor USG P
Normal (n = 35) Pathologic (n = 34)
N % N %
Age (months) 11.8 ± 5.6
(Median = 11)
12.08 ± 5.9
(Median = 11.5)
0.780

Sex (Male/Female) 22/13 21/13 0.56

Use of mother's milk (months) 9.1 ± 5.1
(Median = 11)
7.3 ± 3.8
(Median = 6.5)
0.15

Smoking in the house 16 45.7 18 52.8 0.36

Use of vitamin D 35 100.0 31 91.2 0.11

Risk factor 4 11.4 17 50 0.01

Duration of symptoms (days) 4.5 ± 2.8
(Median = 4)
4.2 ± 3.4
(Median = 3)
0.41

 Fever 13 37.1 18 52.9 0.23
 Cough 35 100.0 31 91.2 0.11
 Rhinitis 31 88.6 24 70.6 0.078
 Wheezing 35 100 33 97.1 0.493
 Rale 29 82.9 30 88.2 0.734
 Rhonchus 34 97.1 33 97.1 1.000
 Use of accessory respiratory muscles 13 37.1 14 41.2 0.808
 Tachypnea 16 45.7 14 41.2 0.809
 Nasal flaring 11 31.4 11 32.4 1.000

Antibiotic treatment (n) 22 62.9 22 64.7 1.000

Recovery period (days) 4.6 ± 2.1
(Median = 4)
5.3 ± 2.7
(Median = 5)
0.20