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Table 2 Clinical presentation at enrolment.

From: Altered cardiac rhythm in infants with bronchiolitis and respiratory syncytial virus infection

Characteristic RSV- positive
n = 34
RSV-negative
n = 35
Pvalue
Severe bronchiolitis, No. (%) 3 (8.8) 3 (8.6) 1.00
Acute onset, No. (%) 6 (17.7) 11 (31.4) 0.18
Rectal temperature ≥38°C, No. (%) 7 (20.6) 6 (17.1) 0.29
   Mean temperature ± SD, °C 37.44 ± 0.74 37.02 ± 0.74 0.19
Mean breath frequency ± SD 54.79 ± 14.06 53.73 ± 12.34 0.78
Dyspnea, No. (%) 21 (61.8) 16 (45.7) 0.18
Wheezing, No. (%) 17 (50.0) 16 (45.7) 0.72
Rales, No. (%) 28 (82.3) 29 (82.9) 0.96
Difficulties in feeding, No. (%) 18 (52.9) 12 (34.3) 0.12
Normal clinical heart assessment, No. (%) 34 (100.0) 35 (100.0) 1.00
Normal echocardiographic parameters, No. (%) 34 (100.0) 35 (100.0) 1.00
Mean cTnI ± SD, IU/L 0.009 ± 0.02 0.013 ± 0.02 0.51
Mean CPK ± SD, IU/L 99.27 ± 69.45 79.88 ± 47.32 0.24
Mean LDH ± SD, IU/L 701.96 ± 190.74 597.95 ± 154.17 0.06
Mean SGOT ± SD, IU/L 38.83 ± 10.91 39.57 ± 19.93 0.86
Mean SGPT ± SD, IU/L 23.93 ± 10.98 28.00 ± 14.30 0.22
Pneumonia at X-ray, No. (%) 22 (64.7) 17 (48.6) 0.18
Need for intravenous infusion, No. (%) 15 (44.1) 13 (37.1) 0.56
Need for oxygen therapy, No. (%) 18 (52.9) 21 (60.0) 0.55
Treated with antibiotics, No. (%) 24 (70.6) 21 (60.0) 0.36
Treated with inhalatory bronchodilator, No. (%) 34 (100.0) 35 (100.0) 1.00
Treated with steroids    
   Oral steroids, No. (%) 6 (17.6) 5 (14.3) 0.75
   Intravenous steroids, No. (%) 2 (5.9) 2 (5.7) 1.00
Treated with drugs interacting with cardiovascular system, No. (%) 0 (0.0) 0 (0.0) -
Chest physiotherapy, No. (%) 1 (2.9) 2 (5.7) 0.98
  1. SD: standard deviation; cTnI: cardiac troponin I; CPK: creatine phosphokinase; LDH: lactate dehydrogenase; SGOT: serum glutamyl oxaloacetic transaminase; SGPT: serum glutamic pyruvic transaminase. P-value for comparison between groups, using chi-square or Fisher's exact test, as appropriate, for categorigal data and Student's test or Wilcoxon rank-sum test, as appropriate, for continuous variables.