Table 2 Characteristics of patients with bronchiolitis caused by MP or RSV

From: Bronchiolitis Associated With Mycoplasma Pneumoniae in Infants in Suzhou China Between 2010 and 2012

Characteristic MP (n = 116), n (%) RSV (n = 343), n (%) χ2/Z test P
Mean age [months (range)] 10.0 (6.0–15.0) 5.2 (3.0–9.0) 8.11 <0.001
 <6 months 22 (19) 208 (60.6) 60.224 <.0001
 6 months–1 year 56 (48.3) 84 (24.5) 23.1362 <.0001
 1–2 years 38 (32.7) 51 (14.9) 17.7494 <.0001
Sex     
 Male 60 (51.7) 257 (74.9 21.84 <0.001
 Female 56 (48.3) 86 (25.1) 21.8426 <0.0001
Fever (°C) 38 (32.8) 92 (26.8) 1.51 >0.05
 <38 1 (5.6) 80 (23.3) 30.09 <0.001
 38–39 5 (13.1) 11 (3.2) 0.07 >0.05
 >39 32 (27.6) 1 (0.3) 96.78 <0.001
Symptom     
 Cough 116 (100) 340 (99.1) Fisher's 0.5751
 Wheezing 116 (100) 343 (100) Fisher's 1
 Tachypnea 13 (11.2) 98 (28.6) 14.2557 0.0002
 Dyspnea 13 (11.2) 86 (25.1) 9.8521 0.0017
 Vomiting/diarrhea 33 (28.4) 67 (19.8) 4.0429 0.0444
Physical examination     
 Lung wheezing rales 89 (76.7) 270 (79.6) 0.2021 0.6531
 Lung crackles 9 (7.8) 32 (9.3) 0.2629 0.6081
SaO2 < 90% 7 (6.0) 89 (25.9) 20.78 <0.001
Lab tests     
 WBC (×109/L) ± sem 7.7 ± 3.5 7.2 ± 2.9 9.84 >0.05
 CRP (mg/L) ± sem 8.5 ± 3.8 7.6 ± 2.3 10.02 >0.05
 Platelet count > 400 × 109/l 79 (68.1) 109 (31.7) 15.3 <0.05
 ALT↑ 30 (25.8) 31 (9) 21.29 <0.001
 CK-MB↑ 41 (35.5) 33 (9.6) 42.42 <0.001
Chest X-ray     
Patchy shadow 14 (12.1) 68 (19.8) 3.55 >0.05
Pulmonary emphysema 19 (16.4) 231 (67.3) 90.79 <0.001
Pulmonary interstitial infiltration 77 (66.4) 44 (12.8) 128.06 <0.001
Mean hospital stay [days (range)] 7.0 (6.3–9.0) 8.0 (7.0–9.0) 5.73 <0.001
Medical history     
 Premature birth 18 (15.5) 40 (11.7) 1.17 >0.05
 Breast feeding 76 (65.5) 198 (57.7) 2.19 >0.05
 Eczema 38 (32.8) 105 (30.6) 0.19 >0.05
Family history of asthma 14 (12.1) 34 (9.9) 0.43 >0.05
  1. Data are expressed as number of patients (%) unless otherwise indicated.
  2. MP, Mycoplasma pneumonia; RSV, respiratory syncytial virus; WBC, white blood cell counts; CRP, C-reactive protein; ALT, alanine transaminase; CK-MB, creatine kinase-MB.