Table 1. Patients’ baseline characteristics (n = 93).
| Age (y) | 73 (45–88) |
| Body mass index (kg/m2) | 21.7 (14.3–30.5) |
| Smoking index (pack-years) | 57 (20–220) |
| FEV1 (% predicted) | 55.0 (19.8–107.1) |
| GOLD stage, I/II/III/IV | 12/46/30/5 |
| High-IgG titer, n (%) | |
| PgFDC381 | 49 (52.7) |
| PgSu63 | 22 (23.7) |
FEV1, forced expiratory volume in one second;
GOLD, Global Initiative for Chronic Obstructive Lung Disease;
“High-IgG titer” includes subjects whose titers against Porphyromonas gingivalis (PgFDC381 and PgSu63) are above mean+2SD of healthy subsets [20].
Pg, Porphyromonas gingivalis. Data are expressed as median (25th–75th percentiles).