Table 3 Comparison of patients with pneumococcal pneumonia caused by penicillin-resistant strains in early and contemporary isolates according to their age and risk stratum.
Early isolates (2002–2004) | Contemporary isolates (2005–2007) | ||||
|---|---|---|---|---|---|
Strata | Overall strains | Penicillin-resistant strains | Overall strains | Penicillin-resistant strains | P-value* |
Age | |||||
50–74 yrs | 17 | 7(41.2) | 42 | 2 (4.8) | 0.001 |
75 yrs or more | 21 | 8 (38.1) | 24 | 10 (41.7) | 0.807 |
Risk strata | |||||
High | 11 | 4 (36.4) | 20 | 6 (30) | 0.717 |
Moderate | 20 | 8 (40) | 26 | 2 (7.7) | 0.008 |
Low | 7 | 3 (42.9) | 20 | 4 (20) | 0.235 |
Overall | 38 | 15 (39.5) | 66 | 12 (18.2) | 0.017 |