Table 4.
Factors associated with 30 and 90 day non-elective readmission after hospitalization for meningitis, NRD 2014
| 30 day | 90 day | |||||||
|---|---|---|---|---|---|---|---|---|
| Characteristic | Total population (index admissions) N=18883 | Number readmitted N=1334 | Percent readmitted Overall= 7.0% | Adjusted Odds Ratio of readmission (95% CI) | Total population (index admissions) N=15614 | Number readmitted N=1653 | Percent readmitted Overall =11.4% | Adjusted Odds Ratio of readmission (95% CI) |
| Age | ||||||||
| 18–24 | 2663 | 110 | 4.1 | Ref. | 2196 | 127 | 5.8 | Ref. |
| 25–34 | 4385 | 237 | 5.4 | 1.28 (0.86–1.89) | 3605 | 241 | 6.7 | 1.07 (0.74–1.55) |
| 35–44 | 3532 | 206 | 5.8 | 1.20 (0.81–1.78) | 2904 | 264 | 9.1 | 1.26 (0.89–1.79) |
| 45–54 | 3219 | 241 | 7.5 | 1.28 (0.87–1.89) | 2705 | 306 | 11.3 | 1.29 (0.90–1.84) |
| 55–64 | 2469 | 225 | 9.1 | 1.25 (0.81–1.93) | 2035 | 272 | 13.3 | 1.12 (0.74–1.7) |
| 65–74 | 1489 | 174 | 11.7 | 0.94 (0.57–1.56) | 1247 | 251 | 20.1 | 0.95 (0.60–1.49) |
| 75–84 | 826 | 100 | 12.1 | 0.84 (0.49–1.43) | 687 | 135 | 19.7 | 0.75 (0.46–1.23) |
| 85+ | 301 | 40 | 13.2 | 0.81 (0.40–1.65) | 236 | 58 | 24.4 | 0.89 (0.47–1.7) |
| Sex | ||||||||
| Male | 8401 | 599 | 7.1 | Ref. | 6963 | 767 | 11.0 | Ref. |
| female | 10482 | 735 | 7.0 | 0.99 (0.81–1.22) | 8651 | 886 | 10.2 | 0.93 (0.77–1.12) |
| Payer | ||||||||
| Medicare | 3331 | 441 | 13.2 | 1.85 (1.30–2.62)** | 2757 | 613 | 22.2 | 2.09 (1.53–2.86)** |
| Medicaid | 3579 | 298 | 8.3 | 1.48 (1.16–1.90)** | 2936 | 349 | 11.9 | 1.50 (1.20–1.88)** |
| Private | 9498 | 459 | 4.8 | REF | 7837 | 521 | 6.7 | REF |
| Other | 2476 | 136 | 5.5 | 1.06 (0.74–1.50) | 2085 | 170 | 8.1 | 1.10 (0.80–1.51) |
| Zip–code quartile | ||||||||
| $1 – $37,999 | 4660 | 394 | 8.4 | 1.20 (0.91–1.59) | 3942 | 529 | 13.4 | 1.48 (1.15–1.90)** |
| $38,000 – $47,999 | 5070 | 385 | 7.6 | 1.19 (0.92–1.54) | 4213 | 440 | 10.4 | 1.22 (0.95–1.57) |
| $48,000 – $63,999 | 4728 | 288 | 6.1 | 1.00 (0.75–1.32) | 3880 | 385 | 9.9 | 1.22 (0.93–1.61) |
| $64000+ | 4426 | 268 | 6.1 | Ref. | 3580 | 300 | 8.4 | Ref. |
| Index stay disposition | ||||||||
| Home | 15379 | 847 (5.5) | 5.5 | Ref. | 12708 | 1029 | 8.1 | Ref. |
| Inpatient post-acute care | 1435 | 214 (14.9) | 14.9 | 1.44 (1.06–1.95)** | 1184 | 308 | 26.0 | 1.59 (1.20–2.12)** |
| Home health care | 1806 | 226 (12.5) | 12.5 | 1.64 (1.26–2.13)** | 1498 | 267 | 17.9 | 1.50 (1.16–1.95)** |
| Other/Unknown | 262 | 47 (17.9) | 17.9 | 3.09 (1.82–5.24)** | 224 | 49 | 21.8 | 2.58 (1.51–4.4)** |
| Elixhauser Comorbidity score | ||||||||
| 0–1 conditions | 10022 | 397 | 4.0 | Ref. | 8307 | 431 | 5.2 | Ref. |
| 2 conditions | 3327 | 236 | 7.1 | 1.60 (1.24–2.08)** | 2723 | 246 | 9.0 | 1.51 (1.17–1.96)** |
| 3 conditions | 2425 | 230 | 9.5 | 1.92 (1.43–2.58)** | 1991 | 322 | 16.2 | 2.55 (1.94–3.35)** |
| 4+ conditions | 3109 | 471 | 15.2 | 2.68 (2.04–3.51)** | 2595 | 654 | 25.2 | 3.55 (2.76–4.58)** |
| Length of Index stay | ||||||||
| <3 days | 5636 | 294 | 5.2 | Ref. | 4604 | 320 | 7.0 | Ref. |
| 3–6 days | 9654 | 574 | 5.9 | 0.92 (0.71–1.18) | 7989 | 719 | 9.0 | 1.00 (0.78–1.27) |
| >6 days | 3594 | 466 | 13.0 | 1.30 (0.93–1.80) | 3022 | 614 | 20.3 | 1.34 (0.99–1.82) |
| Teaching status | ||||||||
| metropolitan non-teaching | 5349 | 323 | 6.0 | 0.86 (0.70–1.05) | 4369 | 426 | 9.7 | 0.96 (0.80–1.16) |
| metropolitan teaching | 12228 | 922 | 7.5 | Ref. | 10166 | 1131 | 11.1 | Ref. |
| Non-metropolitan | 1307 | 88 | 6.7 | 0.85 (0.55–1.31) | 1080 | 96 | 8.9 | 0.70 (0.46–1.06) |
| Any E code during index admission | ||||||||
| Absent | 16846 | 1105 | 6.6 | Ref. | 13936 | 1380 | 9.9 | Ref. |
| Present | 2037 | 228 | 11.2 | 1.43 (1.07–1.91)** | 1678 | 273 | 16.3 | 1.33 (1.02–1.74)** |
| E codes for Medical care E8700–E8799/CCS 2616 | ||||||||
| Absent | 18272 | 1258 | 6.9 | Ref. | 15110 | 1566 | 10.4 | Ref. |
| Present | 612 | 76 | 12.4 | 1.61 (0.94–2.74) | 504 | 87 | 17.3 | 1.47 (0.91–2.40) |
| E codes for Adverse Effects of Medical Drugs E9300–E9499/CCS 2617 | ||||||||
| Absent | 17401 | 1173 | 6.7 | Ref. | 14395 | 1454 | 10.1 | Ref. |
| Present | 1482 | 161 | 10.8 | 1.30 (0.97–1.74) | 1219 | 199 | 16.3 | 1.28 (0.97–1.70) |
| Specific Complications (yes vs. no) | ||||||||
| Mechanical ventilation | 570 | 55 | 9.7 | 0.59 (0.33–1.06) | 497 | 100 | 20.1 | 0.79 (0.49–1.29) |
| cEEG | 64 | * | * | 0.35 (0.09–1.44) | 54 | * | * | 0.68 (0.24–1.93) |
| seizure | 1157 | 168 | 14.5 | 1.22 (0.89–1.66) | 978 | 242 | 24.7 | 1.37 (1.06–1.79)** |
Adjusted for sex, ECI, index disposition, LOS, insurance, zip code income quartile, and readmission hospital teaching status.
**
Indicates statistical significance.