The Journal of Korean Physical Therapy

Table. 1. Table 1

Sociodemographic factors of participants according to COPD

Factors	Categories	COPD (n= 748)	Normal (n= 1,379)	p

		M± SE or %	M± SE or %
COPD prevalence	34.9
Age		72.8± 0.2	71.3± 0.2	< 0.001^*
Sex	Male	74.4	29.7	< 0.001^*
Education level	Elementary	44.2	49.7	0.072
	Middle	21.2	19.2
	High	19.2	19.5
	University	15.4	11.6
Marital status	With	81.3	71.0	< 0.001^*
	Without	18.7	29.0
Individual income	Q1 (Lowest)	25.7	22.2	0.214
	Q2	24.7	23.4
	Q3	25.4	26.0
	Q4 (Highest)	24.2	28.4

M±SE: mean±standard error. *p<0.05.