Table 3. Potential Explanatory Variables by COPD Related Events.
| Events (No) | Events (Yes) | p-value | |
| 1236 (75.6%) | 399 (24.4%) | ||
| Perio/Edent | |||
| Health | 365 (89.5%) | 43 (10.5%) | |
| Entry | 403 (81.1%) | 94 (18.9%) | |
| Severe | 221 (76.2%) | 69 (23.8%) | |
| Edentulous | 247 (56.1%) | 193 (43.9%) | <0.0001 |
| Gold | |||
| I | 763 (87.6%) | 108 (12.4%) | |
| II | 413 (64.0%) | 232 (36.0%) | |
| III–IV | 60 (50.4%) | 59 (49.6%) | <0.0001 |
| Center | |||
| Jackson | 166 (83.4%) | 33 (16.6%) | |
| NC | 365 (70.7%) | 151 (29.3%) | |
| Wash | 350 (72.8%) | 131 (27.2%) | |
| Minn | 355 (80.9%) | 84 (19.1%) | <0.0001 |
| African-American | 197 (82.4%) | 42 (17.6%) | |
| Caucasian | 1035 (74.4%) | 356 (25.6%) | 0.008 |
| Age Mean (StdDev) | 66.0 (5.13) | 63.9 (5.69) | <0.0001 |
| BMI Mean (StdDev) | 27.1 (5.43) | 27.3 (4.83) | 0.36 |
| Male | 669 (71.9%) | 261 (28.1%) | |
| Female | 567 (80.4%) | 138 (19.6%) | <0.0001 |
| Diabetic (Yes) | 159 (65.7%) | 83 (34.3%) | |
| (No) | 1072 (77.3%) | 214 (22.7%) | <0.0001 |
| Hypertension (Yes) | 393 (69.6%) | 172 (30.4%) | |
| (No) | 833 (78.7%) | 225 (21.3%) | <0.0001 |
| Smoking | |||
| Never | 403 (94.6%) | 23 (5.4%) | |
| Former | 587 (74.3%) | 203 (25.7%) | |
| Current | 239 (58.6%) | 169 (41.4%) | <0.0001 |
| Pack Years Mean (StdDev) | 22.4 (24.8) | 47.0 (27.2) | <0.0001 |
| Income | |||
| Low | 368 (69.3%) | 163 (30.7%) | |
| Medium | 444 (75.3%) | 146 (24.8%) | |
| High | 373 (83.6%) | 73 (16.4%) | <0.0001 |
| Education | |||
| Basic | 224 (61.9%) | 138 (38.1%) | |
| Intermediate | 536 (77.0%) | 160 (23.0%) | |
| Advanced | 475 (82.6%) | 100 (17.4%) | <0.0001 |