Table 2.
Comparison among patients with P. aeruginosa infection, non-P. aeruginosa infection, non-P. aeruginosa infection-only patients without previous ear operation (non-P. aeruginosa infection without op), and non-P. aeruginosa infection-only patients with previous ear operation (non-P. aeruginosa infection with op).
| P. aeruginosa (n = 20) | Non-P. aeruginosa (n = 35) | Non-P. aeruginosa without op (n = 20) | Non-P. aeruginosa with op (n = 15) | Significance | ||||
|---|---|---|---|---|---|---|---|---|
| P. aeruginosa versus non-P. aeruginosa | P. aeruginosa versus non-P. aeruginosa without op | P. aeruginosa versus non-P. aeruginosa with op | Non-P. aeruginosa without op versus non-P. aeruginosa with op | |||||
| Clinical features | ||||||||
| Age (mean ± SD), years | 65.8 ± 13.1 | 65.9 ± 13.7 | 70.3 ± 10.5 | 60.1 ± 15.7 | 0.976 | 0.242 | 0.252 | 0.029 |
| Gender (M/F) | 13/7 | 21/14 | 15/5 | 6/9 | 0.779 | 0.731 | 0.182 | 0.080 |
| Diabetes | 16 (80%) | 19 (54.3%) | 15 (75%) | 4 (26.7%) | 0.082 | 1.000 | 0.002 | 0.007 |
| Previous surgery | 0 (0%) | 15 (42.9%) | 0 (0%) | 15 (100%) | <0.001 | — | — | — |
| Otalgia (pain) | 20 (100%) | 21 (60.0%) | 18 (90%) | 3 (20%) | 0.001 | 0.487 | <0.001 | <0.001 |
| Otorrhea (exudate) | 20 (100%) | 28 (80.0%) | 14 (70%) | 14 (93.3%) | 0.04 | 0.020 | 0.429 | 0.199 |
| Otitis externa (swelling) | 17 (85%) | 19 (54.3%) | 17 (85%) | 2 (13.3%) | 0.038 | 1.000 | <0.001 | <0.001 |
| Granulation over EAC | 13 (65%) | 14 (40.0%) | 12 (60%) | 2 (13.3%) | 0.097 | 1.000 | 0.005 | 0.007 |
| CN involvement | 3 (15%) | 5 (14.3%) | 4 (20%) | 1 (6.7%) | 1.000 | 1.000 | 0.619 | 0.365 |
Bold type denotes statistically significant difference (P < 0.05).