Table III.
Global VGDF and Exposure Agreement by Subject Characteristics
| Study Strata | Strata Frequencies | VGDF Exposure | Classification Agreement (kappa score) | ||
|---|---|---|---|---|---|
| n | (%) | (%) | 16 items | JEM | |
| All subjects | 1876 | (100%) | (40%) | 0.58 | 0.37 |
| Gender | |||||
| Men | 830 | (44%) | (50%) | 0.60* | 0.46* |
| Women | 1046 | (56%) | (31%) | 0.51 | 0.23 |
| Age | |||||
| Age 55–59 years | 574 | (31%) | (43%) | 0.59 | 0.39 |
| Age 60–64 years | 454 | (24%) | (43%) | 0.75 | 0.37 |
| Age 65–75 years | 848 | (45%) | (35%) | 0.59 | 0.37 |
| Race and ethnicity | |||||
| White, non-Hispanic | 1622 | (86%) | (40%) | 0.58 | 0.40* |
| Other race, ethnicity | 254 | (14%) | (40%) | 0.55 | 0.24 |
| Education | |||||
| High school education or less | 757 | (40%) | (47%) | 0.59 | 0.36 * |
| Some college | 594 | (32%) | (38%) | 0.58 | 0.38 |
| College degree or higher | 525 | (28%) | (30%) | 0.51 | 0.22 |
| Cigarette smoking status | |||||
| Never smoked | 720 | (38%) | (31%) | 0.51* | 0.29 |
| Former smoker | 368 | (20%) | (48%) | 0.64 | 0.43 |
| Current Smoker | 768 | (41%) | (43%) | 0.64 | 0.39 |
| Airway disease | |||||
| Any COPD or asthma | 465 | (25%) | (52%) | 0.58 | 0.40 |
| No airway disease | 1411 | (75%) | (36%) | 0.57 | 0.36 |
*
p<0.05, kappa statistic difference across strata