Table 1.
Demographic and clinical characteristics of COPD patients in the intradermal (ID) group (n = 75) and intramuscular (IM) group (n = 74).
| Characteristics | ID group | IM group | P-value |
|---|---|---|---|
| Age, years (mean ± SD, range) | 72 ± 8, 60 - 88 | 73 ± 7, 60 - 94 | 0.765 |
| Male sex, no. (%) | 68 (90.7) | 68 (91.9) | 0.791 |
| BMI (kg/m2)a, no. (%) | |||
| < 18.5 (underweight) | 15 (20.0) | 16 (21.6) | 0.253 |
| 18.5-24.9 (normal) | 44 (58.7) | 47 (63.5) | 0.273 |
| 25-29.9 (overweight) | 13 (17.3) | 10 (13.5) | 0.691 |
| ≥ 30 (obese) | 3 (4.0) | 1 (1.4) | 0.558 |
| Severity of COPDb, no. (%) | |||
| Mild | 18 (24.0) | 18 (24.3) | 0.963 |
| Moderate | 36 (48.0) | 29 (39.2) | 0.278 |
| Severe | 18 (24.0) | 25 (33.8) | 0.188 |
| Very severe | 3 (4.0) | 2 (2.7) | 0.660 |
| Co-morbidity, no. (%) | |||
| Hypertension | 50 (66.7) | 38 (51.4) | 0 .057 |
| Dyslipidemia | 34 (45.3) | 32 (43.2) | 0.797 |
| Diabetes mellitus | 11 (14.7) | 9 (12.2) | 0.654 |
| Coronary artery disease | 13 (17.3) | 10 (13.5) | 0.519 |
| Cerebrovascular accident | 3 (4.0) | 7 (9.5) | 0.183 |
| Inhaled corticosteroid use, no. (%) | 36 (48.0) | 41 (55.4) | 0.366 |
| Previous TIV, no. (%) | 63 (84.0) | 57 (77.0) | 0.282 |
| Previous TIV, months (mean + SD) | 16.2 ± 8.9 | 14.7 ± 7.0 | 0.303 |
BMI = body mass index,
a
WHO BMI Classification30,
b
a spirometric classification of COPD severity1, TIV = trivalent influenza vaccination