Table 1.
Individual and community-level characteristics of patients with ceftriaxone-susceptible and resistant urinary Escherichia coli isolates
| Characteristic | Escherichia coli isolates | |
|---|---|---|
| Ceftriaxone susceptible | Ceftriaxone resistant | |
| N = 6350 | N = 382 | |
| Patient-level characteristics | ||
| Sex | ||
| Female | 5677 (89.4%) | 331 (86.6%) |
| Male | 673 (10.6%) | 51 (13.4%) |
| Age group | ||
| Median (IQR) | 56 (32–74) | 58 (31–75) |
| Age 12 or less | 394 (6.2%) | 22 (5.8%) |
| Not available | 3 (0%) | 0 |
| Residence in RACF | ||
| No | 6060 (95.4%) | 337 (88.2%) |
| Yes | 290 (4.6%) | 45 (11.8%) |
| Referral source | ||
| Community | 5763 (90.8%) | 332 (86.9%) |
| Hospital: ED | 343 (5.4%) | 15 (3.9%) |
| Hospital: non-ED | 244 (3.8%) | 35 (9.2%) |
| Postcode-level characteristics | ||
| Region | ||
| Northern Metropolitan | 613 (9.7%) | 59 (15.4%) |
| Eastern Metropolitan | 663 (10.4%) | 47 (12.3%) |
| South-Eastern Metropolitan | 911 (14.3%) | 70 (18.3%) |
| Southern Metropolitan | 632 (10%) | 28 (7.3%) |
| Western Metropolitan | 904 (14.2%) | 78 (20.4%) |
| Northern Victoria | 735 (11.6%) | 28 (7.3%) |
| Eastern Victoria | 922 (14.5%) | 51 (13.4%) |
| Western Victoria | 264 (4.2%) | 6 (1.6%) |
| Other | 699 (11%) | 15 (3.9%) |
| Not available | 7 (0.1%) | 0 |
| Remoteness area | ||
| Major Cities | 4989 (67.5%) | 333 (78.4%) |
| Inner Regional | 1865 (25.2%) | 72 (16.9%) |
| Outer Regional | 509 (6.9%) | 20 (4.7%) |
| Remote | 26 (0.4%) | 0 |
| Very Remote | 4 (0.1%) | 0 |
| Index of Relative Socio-economic Disadvantage, decilea | ||
| 1 | 542 (8.5%) | 49 (12.8%) |
| 2 | 345 (5.4%) | 11 (2.9%) |
| 3 | 448 (7.1%) | 24 (6.3%) |
| 4 | 582 (9.2%) | 33 (8.6%) |
| 5 | 613 (9.7%) | 36 (9.4%) |
| 6 | 746 (11.7%) | 58 (15.2%) |
| 7 | 695 (10.9%) | 42 (11%) |
| 8 | 846 (13.3%) | 44 (11.5%) |
| 9 | 945 (14.9%) | 52 (13.6%) |
| 10 | 568 (8.9%) | 32 (8.4%) |
| Not available | 20 (0.3%) | 1 (0.3%) |
| Percentage of postcode residents born in region, median (IQR) | ||
| Oceania and Antarctica | 70.1 (58.0–78.3) | 62.9 (53.7–74.4) |
| North-West Europe | 4.5 (3.2–6.6) | 4.0 (2.4–6.0) |
| Southern and Eastern Europe | 2.4 (1.2–4.3) | 2.8 (1.6–5.8) |
| North Africa and the Middle East | 0.7 (0.2–1.3) | 1.0 (0.5–1.7) |
| South-East Asia | 2.7 (1.0–5.3) | 3.6 (1.7–7.1) |
| North-East Asia | 1.5 (0.5–3.9) | 1.8 (0.7–4.4) |
| Southern and Central Asia | 2.9 (0.8–7.1) | 4.6 (1.5–8.6) |
| Americas | 0.5 (0.4–0.7) | 0.5 (0.4–0.7) |
| Sub-Saharan Africa | 0.6 (0.3–1.0) | 0.6 (0.4–1.0) |
| Not available | 9.3 (7.4–11.0) | 9.6 (7.7–11.6) |
ED, Emergency department; IQR, interquartile range; RACF, residential aged-care facility. aThe 1st decile represents the most disadvantaged group