Bhatt, Surya P <br/><br/>
Smoking duration alone provides stronger risk estimates of chronic obstructive pulmonary disease than pack-years.  [electronic resource] 

 -  Thorax  05 2018 
 - 414-421 p.  digital 
<br/><br/> Publication Type: Journal Article; Multicenter Study; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1468-3296 
<br/><br/><label>Standard No.: </label>10.1136/thoraxjnl-2017-210722  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aged<br/>Cigarette Smoking--adverse effects<br/>Cohort Studies<br/>Cross-Sectional Studies<br/>Female<br/>Forced Expiratory Volume<br/>Humans<br/>Male<br/>Middle Aged<br/>Pulmonary Disease, Chronic Obstructive--epidemiology<br/>Pulmonary Emphysema--diagnostic imaging<br/>Risk Assessment--methods<br/>Surveys and Questionnaires<br/>Time Factors<br/>Tomography, X-Ray Computed<br/>Vital Capacity<br/>Walk Test