Table 1.
Patient characteristics.
| Characteristics | Overall (n = 172) |
Resistant GNR Group (n = 37) | Non-Resistant GNR Group (n = 135) | p-value |
|---|---|---|---|---|
| Age, median (IQR), years | 80 (72–85) | 80 (70–85) | 79 (73–85) | 0.906 |
| Males, no. (%) | 60 (35) | 18 (49) | 42 (31) | 0.047 |
| Length of ICU/HCU stay, mean (SD), days | 3.6 (2.2) | 3.8 (2.7) | 3.5 (2.1) | 0.481 |
| Pyelonephritis, no. (%) | 165 (96) | 36 (97) | 129 (96) | 0.995 |
| Bacteremia, no. (%) | 81 (47) | 16 (43) | 65 (48) | 0.596 |
| Risk factors, no. (%) | ||||
| Nursing home residence | 38 (22) | 15 (41) | 23 (17) | 0.002 |
| Antibiotic use within last 3 months | 9 (5.2) | 5 (14) | 4 (3) | 0.023 |
| Hospitalization within last 3 months | 10 (5.8) | 6 (16) | 4 (3) | 0.007 |
| Resistant GNR colonization a | 5 (2.9) | 3 (8.1) | 2 (1.5) | 0.071 |
| Bed-ridden status b | 30 (17) | 13 (35) | 17 (13) | 0.001 |
| Diabetes | 47 (27) | 8 (22) | 39 (29) | 0.415 |
| Long-term urinary catheter | 14 (8.1) | 7 (19) | 7 (5.2) | 0.013 |
| Immunosuppression c | 42 (24) | 11 (30) | 31 (23) | 0.396 |
Abbreviations: IQR, interquartile range; GNR, Gram-negative rod; ICU, intensive care unit; HCU, high care unit; SD, standard deviation. Significant p-values are indicated in bold. a A history of positive resistant GNR culture within the last 6 months. b Patient unable to get off the bed without assistance. c Patient with malignancy or immunodeficiency and history of receiving immunosuppressive agents.