Prevalence of COPD and its association with socioeconomic status in China: Findings from China Chronic Disease Risk Factor Surveillance 2007

Table 5 Adjusted odds ratio and 95%CI of SES for COPD among different subgroups *

	Aged 30-69 years		Excluding subjects with asthma
	Urban	Rural	Urban	Rural
Educational level
≥ 12 years	1	1	1	1
9-11 years	1.17 (0.91-1.51)	1.14 (0.84-1.53)	1.12 (0.86-1.46)	1.07 (0.79-1.46)
< 9 years	1.62 (1.27-2.06)	1.61 (1.23-2.12)	1.59 (1.24-2.05)	1.60 (1.21-2.12)
P for trend	< 0.001	< 0.001	< 0.001	< 0.001
Income
High	1	1	1	1
Middle	1.12 (0.88-1.42)	0.86 (0.69-1.08)	1.05 (0.82-1.35)	0.78 (0.62-0.98)
Low	1.60 (1.25-2.01)	1.01 (0.82-1.25)	1.52 (1.17-1.97)	0.91 (0.73-1.14)
P for trend	< 0.001	0.466	< 0.001	0.942

*Adjusted for age, sex, smoking status, passive smoking exposure and geographic regions

ISSN: 1471-2458