Relationship between Air Pollution and Hospital Admissions for Chronic Obstructive Pulmonary Disease in Changchun, China: A Season-Stratified Case-Cross Study

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Characteristics</td><td class="align_center">COPD (<i>N</i> = 1733)</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left"><i>Sex</i></td><td class="align_center"> </td></tr><tr><td class="align_left"> Male</td><td class="align_center">768 (44.3%)</td></tr><tr><td class="align_left"> Female</td><td class="align_center">965 (55.7%)</td></tr><tr><td class="align_left"><i>Age</i></td><td class="align_center">69.94 ± 10.32</td></tr><tr><td class="align_left"><i>Season of acute exacerbation</i></td><td class="align_center"> </td></tr><tr><td class="align_left"> Spring</td><td class="align_center">480 (27.7%)</td></tr><tr><td class="align_left"> Summer</td><td class="align_center">152 (8.8%)</td></tr><tr><td class="align_left"> Autumn</td><td class="align_center">587 (33.9%)</td></tr><tr><td class="align_left"> Winter</td><td class="align_center">514 (29.6%)</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Characteristics of patients with COPD.</div>

Canadian Respiratory Journal

tab1

Table 1

Table 1: Relationship between Air Pollution and Hospital Admissions for Chronic Obstructive Pulmonary Disease in Changchun, China: A Season-Stratified Case-Cross Study 

Table 1 | Relationship between Air Pollution and Hospital Admissions for Chronic Obstructive Pulmonary Disease in Changchun, China: A Season-Stratified Case-Cross Study 