Normal values for <a href="https://en.wikipedia.org/wiki/Forced_vital_capacity" class="extiw" title="en:Forced vital capacity">Forced Vital Capacity</a> (FVC), <a href="https://en.wikipedia.org/wiki/forced_expiratory_volume" class="extiw" title="en:forced expiratory volume">Forced Expiratory Volume</a> in 1 Second (FEV1) and <a href="https://en.wikipedia.org/wiki/forced_expiratory_flow" class="extiw" title="en:forced expiratory flow">Forced Expiratory Flow</a> 25–75% (FEF25–75%).
<p>Y-axis is expressed in Litres for FVC and FEV1, and in Litres/second for FEF25–75%.
<i>See main article: <a href="https://en.wikipedia.org/wiki/Spirometry" class="extiw" title="wikipedia:Spirometry">Wikipedia:Spirometry</a></i>
</p>
<h2><span class="mw-headline" id="Reference">Reference</span></h2>
<ul><li><cite style="font-style:normal">Stanojevic S, Wade A, Stocks J, <i>et al.</i> (February 2008). "<a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2643211">Reference ranges for spirometry across all ages: a new approach</a>". <i>Am. J. Respir. Crit. Care Med.</i> <b>177</b> (3): 253–60. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1164/rccm.200708-1248OC">10.1164/rccm.200708-1248OC</a>. <a href="https://en.wikipedia.org/wiki/PMID" class="extiw" title="w:PMID">PMID</a> <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/18006882">18006882</a>. <a href="https://en.wikipedia.org/wiki/PubMed_Central" class="extiw" title="w:PubMed Central">PMC</a>: <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2643211">2643211</a>.</cite></li></ul>
<p><a href="https://en.wikipedia.org/wiki/User:Mikael_H%C3%A4ggstr%C3%B6m" class="extiw" title="en:User:Mikael Häggström">Mikael Häggström</a>.
</p><p>When using this image in external works, it may be cited as:
</p>
<ul><li><cite style="font-style:normal">Häggström, Mikael (2014). "<a class="external text" href="https://en.wikiversity.org/wiki/WikiJournal_of_Medicine/Medical_gallery_of_Mikael_H%C3%A4ggstr%C3%B6m_2014">Medical gallery of Mikael Häggström 2014</a>". <i>WikiJournal of Medicine</i> <b>1</b> (2). <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.15347/wjm/2014.008">10.15347/wjm/2014.008</a>. <a href="https://en.wikipedia.org/wiki/International_Standard_Serial_Number" class="extiw" title="en:International Standard Serial Number">ISSN</a> <a rel="nofollow" class="external text" href="https://www.worldcat.org/issn/2002-4436">2002-4436</a>.</cite> <a rel="nofollow" class="external text" href="https://creativecommons.org/publicdomain/zero/1.0/deed.en">Public Domain</a>.</li></ul><p>or
</p>
<ul><li><i>By Mikael Häggström, used with permission.</i></li></ul>
<p><span class="int-own-work" lang="en">Own work</span>
</p>
Made in <a href="https://en.wikipedia.org/wiki/Inkscape" class="extiw" title="en:Inkscape">Inkscape</a>