Demographic and clinical characteristics associated with RSV-positive, negative, mono-, co-infection and subgroups.

Abbreviation: d, day; m, month; hos, hospitalization; URTI, upper respiratory infection; RSV, respiratory syncytial virus; NA, not applicable; NS, not significant; pos, positive; neg, negative; mono, mono-infection; co, co-infection.Note: All results are expressed in percentages except for (a) in median with interquartile range between brackets.bChi-squared test.cMann-Whitney-U test.