Duration of antibiotic treatment.

<p>Box plots of the distribution of the duration of antibiotic (AB) treatment (in days) for children and adolescents with lower respiratory tract infection (LRTI) in the procalcitonin (PCT) and control group.</p

Trial profile.

<p>Trial profile.</p

Impairment of daily activities.

<p>Impairment of daily activities attributable to lower respiratory tract infection (LRTI) over time in 267 children and adolescents who returned diaries in the procalcitonin (PCT) and control group. The smooth curves are local averages calculated using the default loess smoother in R.</p

Patient baseline characteristics.

<p>Abbreviations: PCT, procalcitonin; IQR, interquartile range; CRP, C-reactive protein; Non-CAP, non-community-acquired pneumonia; LRTI, lower respiratory tract infection. * N in this column indicate the number of individuals with information on a particular variable.</p

Subgroup analyses.

<p>Abbreviations: PCT, procalcitonin; CI, confidence interval; Non-CAP, non-community-acquired pneumonia; LRTI, lower respiratory tract infection. * Number of individuals with available data for a given endpoint.</p