TABLE 2.

Pseudomonas aeruginosa incidence rates, study activity and age according to recruiting centre

Centre	Recruits	Age years median (IQR)	Study activity		P. aeruginosa incidence cases per patient-year (95% CI)
			Total visits	Visits per patient year median (IQR)
1	24	7.6 (4.0–8.0)	188	5.7 (5.3–6.3)	0.22 (0.10–0.40)
2	34	8.8 (6.0–12.0)	348	4.9 (4.3–5.2)	0.18 (0.10–0.29)
3	21	6.9 (4.9–13.2)	193	4.2 (3.5–4.5)	0.27 (0.15–0.43)
4	53	9.1 (5.4–12.5)	229	2.4 (1.9–2.8)	0.20 (0.12–0.29)
5	30	9.4 (6.7–12.9)	306	5.2 (4.5–5.5)	0.13 (0.07–0.25)
6	18	8.0 (2.4–10.7)	136	4.5 (3.7–5.3)	0.28 (0.14–0.49)
7	36	5.2 (3.3–8.5)	477	5.9 (5.2–6.7)	0.08 (0.04–0.18)
8	17	8.4 (5.2–12.0)	209	5.5 (4.9–6.2)	0.22 (0.10–0.40)
Total	233	8.0 (5.0–12.2)	2086	4.8 (3.1–5.6)	0.17 (0.14–0.22)

Data are presented as n unless otherwise stated. Children in the Free From But Treated group were excluded when the P. aeruginosa incidence and antibiotic courses were calculated. IQR: interquartile range.