A Strong Graded Relationship between Level of Obesity and COPD: Findings from a National Population-Based Study of Lifelong Nonsmokers
Table 3
Prevalence of COPD by obesity level and other characteristics among non-Hispanic white older men (aged 50+) who had never smoked ()1.
No COPD
COPD
value2
(96.9%)
(3.1%)
Obesity
BMI < 25 (ref)
97.5%
2.5%
<0.001
Overweight (BMI = 25–29)
97.8%
2.2%
Obese (BMI = 30–39.9)
96.2%
3.8%
Class III obesity (BMI ≥ 40)
92.4%
7.6%
Age by decade
50s (ref)
98.1%
1.9%
<0.001
60s
96.8%
3.2%
70s
95.5%
4.5%
80+
95.9%
4.1%
Height (mean, SD)
70.3 (2.8)
69.3 (3.2)
<0.001
Socioeconomic status
Education
55.59%
Did not graduate high school
94.1%
5.9%
<0.001
Graduated high school
96.7%
3.3%
Attended college or technical school
96.9%
3.1%
Graduated from college or technical school
97.9%
2.1%
Household income
$75,000 or more (ref)
98.6%
1.4%
<0.001
$50,000 to less than $75,000
97.9%
2.1%
$25,000–$49,999
96.2%
3.8%
$15,000–$24,999
94.4%
5.6%
<$15,000
90.9%
9.1%
Missing
96.8%
3.2%
Household conditions
Marital status
Married/common-law
97.2%
2.8%
<0.001
Never married
96.0%
4.0%
Number of adults/households
1
95.5%
4.5%
<0.001
2
97.1%
2.9%
≥3
97.5%
2.5%
Missing
98.1%
1.9%
Health plan
Yes (ref)
97.0%
3.0%
0.773
No
97.1%
2.9%
1Sample sizes are presented in their unweighted form. Percentages are weighted to adjust for the probability of selection and nonresponse. 2 value is derived from a chi-square test for categorical variables and t-test for continuous variables. Source: Behavioral Risk Factor Surveillance System 2012. SD = standard deviation.
