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. 2015 Aug 25;5(2):161–169. doi: 10.1093/jpids/piv045

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© The Author 2015. Published by Oxford University Press on behalf of the Pediatric Infectious Diseases Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 2. — Spirometry results overview. Graphs illustrating the degree and distribution of spirometric abnormality. (A) Boxes represent 25th and 75th percentiles, whiskers represent 10th and 90th percentiles, with outliers shown as individual dots. Upper limit of normal (ULN) and lower limit of normal (LLN) drawn by dashed line at +1.64 standard deviation (SD) and −1.64 SD from the mean, respectively. (B) Forced expiratory volume (FEV₁) z-score for all participants as a function of age. Linear regression model is shown as a solid line. There is a nonsignificant tendency to reducing FEV₁ with increasing age in this cohort (r² = 0.026; P = .054). Similar results for forced vital capacity obtained (results not shown).