Prevalence, characteristics, and risk of exacerbation in young patients with chronic obstructive pulmonary disease

Table 3 COPD related medical expenses for 3 years follow up

	Non-COPD	Young COPD		P value
	Non-COPD	Never-smoker	Ever-smoker	P value
COPD related medical expenses, cost per person-year
Hospitalization	1779.92 ± 1289.52	1566.16 ± 1042.78	1849.75 ± 1001.13	0.997
Outpatient clinic	657.43 ± 610.12	848.42 ± 884.90	431.46 ± 531.47	0.357
Total	1085.21 ± 954.61	1259.96 ± 1362.40	1005.52 ± 1189.53	0.984

All costs are presented in US dollars (USD) with an exchange rate of 1 USD equal to 1211 Korean won (exchange rate on Jan 20, 2022)
Data are presented as cost per person-years ± standard deviation

ISSN: 1465-993X