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Table 2 Comparison of clinical features by mean duration from symptom onset to hospitalization

From: Clinical significance of Mycoplasma pneumoniae specific IgM titer in children hospitalized with Mycoplasma pneumoniae pneumonia

Variables, mean ± SD or n (%) Within 6 days from symptom onset to hospitalization More than 7 days from symptom onset to hospitalization P value
n 83 71 NA
Male, n (%) 44/83 (53.0) 31/71 (43.7) 0.247
Age at diagnosis of MP pneumonia, years 6.1 ± 4.2 5.9 ± 3.4 0.757
Total duration of fever during the illness, days 5.2 ± 7.6 9.1 ± 4.6 < 0.001
Total hospitalization duration, days 9.0 ± 5.3 10.1 ± 5.3 0.200
Development of any extra-pulmonary symptoms, n (%) 10/83 (12.0) 26/71 (36.6) < 0.001
Pleural effusion, yes, n (%) 9/83 (10.8) 16/71 (22.5) 0.050
Oxygen need, yes, n (%) 4/83 (4.8) 6/71 (8.5) 0.362
Respiratory virus co-infection, yes, n (%) 30/83 (36.1) 35/71 (49.3) 0.100
Positive results on pneumobacter PCR except MP, n (%) 13/32 (40.6) 14/41 (34.1) 0.569
Macrolide resistant MP, n (%) 58/80 (72.5) 59/66 (89.4) 0.011
Response to stepwise treatment for MP pneumonia, n (%) 0.657
 Good response 34/83 (41.0) 24/71 (33.8)  
 Poor response 49/83 (59.0) 47/71 (66.2)  
Severity of pneumonia based on chest radiography 0.089
 Mild 12/83 (14.5) 6/71 (8.5)  
 Moderate 57/83 (68.7) 43/71 (60.6)  
 Severe 14/83 (16.9) 22/71 (31.0)  
  1. MP: Mycoplasma pneumoniae; n: number; NA: not applicable; PCR: polymerase chain reaction; SD: standard deviation