Table 1 Demographic, clinical, and laboratory variables in 110 children hospitalized for radiologically confirmed community-acquired pneumonia according to their infection status

 Males (%)

61 (55.4)

45 (60.8)*

5 (31.2)*

11 (55.0)

 Mean age ± SD (years)

4.8 ± 3.4

5.1 ± 3.4

3.6 ± 2.8

4.9 ± 3.5

 Caucasians (%)^a

95 (88.8)

62 (87.3)

13 (81.2)

20 (100.0)

 At least one parent smoked (%)^a

28 (25.9)

19 (26.0)

5 (31.2)

4 (21.0)

 Presence of fever” (%)

91 (82.7)

64 (86.5)

12 (75.0)

15 (75.0)

 O₂ therapy (%)^a

26 (25.2)

14 (19.7)*

7 (50.0)*

5 (27.8)

  Rhonchi

12 (10.9)

5 (6.8)

3 (18.7)

4 (20.0)

  Rales

92 (83.6)

63 (85.1)

14 (87.5)

15 (75.0)

  Wheezing

21 (19.1)

11 (14.9)

3 (18.7)

7 (35.0)

  Any of the above

96 (87.3)

64 (86.5)

15 (93.7)

17 (85.0)

 Severe disease

84 (76.4)

59 (79.7)

12 (75.0)

13 (65.0)

 WBC (cells/μL)^a

15,741 ± 8,575

16,573 ± 8,969

13,674 ± 7338

14,358 ± 7,899

  Neutrophils, %^a

66.1 ± 19.3

68.3 ± 18.4

65.2 ± 17.8

59.2 ± 22.9

 CRP, μg/dL^a

25.5 ± 47.4

32.2 ± 55.5*

9.4 ± 17.0*

14.0 ± 19.4

 LIP2, ng/mL

2,079 ± 1,606

2,158 ± 1,744

1,880 ± 1,015

1,946 ± 1,488

 SYD4, ng/mL

5.08 ± 3.95

5.27 ± 4.10

4.31 ± 3.06

4.99 ± 4.14