Table 1: Description of a sample of never-smoking Americans over the age of 50 according to COPD status ()1.

No COPDCOPD value2

Sex/gender and race
 White men97.1%2.9%<0.001
 Black men97.6%2.4%
 White women94.8%5.2%
 Black women93.0%7.0%
Age by decade
Height (mean, SD)66.48 (4.07)65.28 (3.98)<0.001
 Did not graduate high school91.3%8.7%<0.001
 Graduated high school95.0%5.0%
 Attended college or technical school95.4%4.6%
 Graduated from college or technical school97.4%2.6%
Household income
 $75,000 or more98.2%1.8%<0.001
 $50,000 to less than $75,00097.1%2.9%
Marital status
 Never married95.4%4.6%
Number of adults/households
Health plan

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 chi-square tests for categorical variables and -tests for continuous variables. Source: Behavioral Risk Factor Surveillance System 2012.