Airway, but not serum or urinary, levels of YKL-40 reflect inflammation in early cystic fibrosis lung disease

BMC Pulmonary Medicine

Table 1 Demographic and clinical characteristics

Metric	Variable
Individual patient	Sex (m:f)	18:18
	Phe508del (homozygous: heterozygous)	20:16
	Pancreatic insufficient	33/36 (91.7%)
BAL¹	Age at time of BAL (years) [mean ± SD]	3.95 ± 2.21
	Respiratory symptoms at time of BAL	22 (40%)
	Respiratory infection in BAL	41 (75%)
	P. aeruginosa infection in BAL	16 (29%)

¹55 BAL were obtained from 36 patients, variables related to each BAL considered as a separate event.

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