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. 2014 Apr 3;146(2):476–495. doi: 10.1378/chest.14-0527

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© 2014 AMERICAN COLLEGE OF CHEST PHYSICIANS

This is an open access article distributed under the terms of the Creative Commons Attribution-Noncommercial License (http://creativecommons.org/licenses/by-nc/3.0/), which permits unrestricted use, distribution, and reproduction to noncommercial entities, provided the original work is properly cited. Information for reuse by commercial entities is available online.

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– Comparison of average length of hospital stay by age groups for discharges for pulmonary hypertension (PH) as any listed International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) diagnosis: United States, 2001/2002 and 2009/2010. In both 2001/2002 and 2009/2010, the average length of stay for PH hospitalizations for those aged ≤ 35 y was longer than for all other age groups (P < .05). (Adapted with permission from Centers for Disease Control and Prevention, National Center for Health Statistics.¹¹)