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Table 1 Clinical and laboratory findings according to age

From: Difference of clinical features in childhood Mycoplasma pneumoniae pneumonia

Age groups ≤2 y 3-5 y ≥6 y P
  (n = 29) (n = 81) (n = 81)  
Clinical characteristics     
Age (y) 2.0 ± 0.7 4.2 ± 0.8 8.3 ± 2.3 <0.001
Duration of fever (d)     
   Before admission 3.1 ± 2.3 3.6 ± 2.8 4.2 ± 2.3 0.09
   Total duration 4.8 ± 2.9 5.4 ± 3.3 6.1 ± 2.9* 0.1
   Cases of ≥7 d (n,%) 9 (31) 29 (36) 40 (49) 0.04
Hospitalization (d) 6.9 ± 1.8 6.9 ± 2.3 6.8 ± 2.1 0.9
Pneumonia (n,%)     
   Bronchopneumonia 23 (79) 48 (59) 25 (31) <0.001
   Segmental/lobar 6 (21) 33 (41) 56 (69) <0.001
Laboratory findings     
Hemoglobin (g/dL) 12.2 ± 0.9 12.1 ± 0.9 12.3 ± 0.9 0.6
Leukocyte (×103//μL) 11.2 ± 7.3 7.9 ± 3.5 7.1 ± 2.40 <0.001
   Neutrophil (%) 47 ± 14 61 ± 14 65 ± 11 <0.001
   Lymphocyte (%) 42 ± 13 29 ± 13 24 ± 9 <0.001
   Monocyte (%) 9 ± 3 8 ± 3 8 ± 3 0.2
Platelet (×103/μL) 319 ± 111 266 ± 91 251 ± 75 0.002
CRP (mg/dL) 1.6 ± 2.9 3.8 ± 4.8 4.1 ± 4.1 0.03
ESR (mm/h) 40 ± 22 44 ± 20 46 ± 21 0.4
Seroconveter (n, %) 16 (55) 35 (43) 35 (43) 0.4
  1. * P = 0.04, compared to the ≤2 y group
  2. Number of cases that had the duration of fever ≥7 days.
  3. Number of patients who showed negative on the initial examination, and converted to positive on the second examination by Serodia Myco II.