Infant clusters 3 weeks after onset of acute respiratory tract infection (ARI) (swab B) and subsequent presence of symptoms after the onset of the first ARI
| Cluster (n=155) | B1 (n=96) | B2 (n=34) | B3 (n=25) | p-value |
| Symptomatic after 1 week | 70 (72.9) | 22 (64.7) | 16 (64.0) | 0.135# |
| Symptomatic after 2 weeks | 28 (30.2) | 5 (14.7) ↓ | 9 (36.0) | 0.454# |
| Symptomatic after 3 weeks | 27 (29.2) | 2 (5.9) ↓ | 14 (56.0) ↑ | <0.001¶ |
| Continuously symptomatic for ≥3 weeks | 16 (16.7) | 1 (2.9) ↓ | 9 (36.0) ↑ | 0.010¶ |
Data are presented as n (%), unless otherwise stated. Statistical analyses were performed using #: Chi-squared; or ¶: Fisher's exact test. Significant overrepresentation (↑) and significant underrepresentation (↓) of presence of symptoms in the clusters was assessed by enrichment analysis. The dominating bacterial families in the clusters are as follows. B1: Moraxellaceae; B2: “Others”; B3: Streptococcaceae.