Characteristics of patients with hypoxic ischemic brain injury in the acute care setting and readmission within 1 year of the acute care discharge, Ontario, 2002/03–2010/11
| Characteristic | No. (%) of discharges n = 593 | Readmission within 1 yr, no. (%) of patients | p value | |
|---|---|---|---|---|
| Yes n = 233 | No n = 360 | |||
| Age at admission, yr | ||||
| 20–34 | 54 (9.1) | 20 (8.6) | 34 (9.4) | 0.2 |
| 35–49 | 107 (18.0) | 35 (15.0) | 72 (20.0) | |
| 50–64 | 189 (31.9) | 70 (30.0) | 119 (33.0) | |
| 65–79 | 188 (31.7) | 85 (36.5) | 103 (28.6) | |
| ≥ 80 | 55 (9.3) | 23 (9.9) | 32 (8.9) | |
| Sex | ||||
| Female | 204 (34.4) | 72 (30.9) | 132 (36.7) | 0.1 |
| Male | 389 (65.6) | 161 (69.1) | 228 (63.3) | |
| Income quintile | ||||
| 1 (lowest) | 165 (27.8) | 62 (26.6) | 103 (28.6) | 0.8 |
| 2 | 126 (21.2) | 52 (22.3) | 74 (20.6) | |
| 3 | 105 (17.7) | 42 (18.0) | 63 (17.5) | |
| 4 | 123 (20.7) | 52 (22.3) | 71 (19.7) | |
| 5 (highest) | 74 (12.5) | 25 (10.7) | 49 (13.6) | |
| Rurality | ||||
| Rural | 58 (9.8) | 23 (9.9) | 35 (9.7) | 1.0 |
| Urban | 535 (90.2) | 210 (90.1) | 325 (90.3) | |
| Johns Hopkins ACG Resource Utilization Bands category | ||||
| None or healthy | 34 (5.7) | 13 (5.6) | 21 (5.8) | 0.7 |
| Low | 35 (5.9) | 13 (5.6) | 22 (6.1) | |
| Moderate | 198 (33.4) | 75 (32.2) | 123 (34.2) | |
| High | 152 (25.6) | 56 (24.0) | 96 (26.7) | |
| Very high | 174 (29.3) | 76 (32.6) | 98 (27.2) | |
| Comorbidity index* | ||||
| < 10 | 187 (31.5) | 69 (29.6) | 118 (32.8) | 0.3 |
| 10–30 | 265 (44.7) | 101 (43.3) | 164 (45.6) | |
| > 30 | 141 (23.8) | 63 (27.0) | 78 (21.7) | |
| Fiscal year | ||||
| 2002/03–2003/04 | 137 (23.1) | 50 (21.4) | 87 (24.2) | 0.9 |
| 2004/05–2005/06 | 123 (20.7) | 51 (21.9) | 72 (20.0) | |
| 2006/07–2007/08 | 131 (22.1) | 50 (21.4) | 81 (22.5) | |
| 2008/09–2009/10 | 138 (23.3) | 56 (24.0) | 82 (22.8) | |
| 2010/11 | 64 (10.8) | 26 (11.2) | 38 (10.6) | |
| No. of special care hours | ||||
| 0 | 86 (14.5) | 31 (13.3) | 55 (15.3) | 0.6 |
| 1–499 | 333 (56.2) | 127 (54.5) | 206 (57.2) | |
| 500–999 | 95 (16.0) | 40 (17.2) | 55 (15.3) | |
| ≥ 1000 | 79 (13.3) | 35 (15.0) | 44 (12.2) | |
| Index length of stay, d | ||||
| < 10 | 119 (20.1) | 37 (15.9) | 82 (22.8) | 0.1 |
| 10–30 | 203 (34.2) | 77 (33.0) | 126 (35.0) | |
| 31–90 | 210 (35.4) | 94 (40.3) | 116 (32.2) | |
| > 90 | 61 (10.3) | 25 (10.7) | 36 (10.0) | |
| No. of alternate level of care days | ||||
| 0 | 354 (59.7) | 131 (56.2) | 223 (61.9) | 0.4 |
| 1–14 | 100 (16.9) | 44 (18.9) | 56 (15.6) | |
| > 14 | 139 (23.4) | 58 (24.9) | 81 (22.5) | |
| Psychological/behavioural diagnosis | ||||
| Absent | 452 (76.2) | 185 (79.4) | 267 (74.2) | 0.1 |
| Present | 141 (23.8) | 48 (20.6) | 93 (25.8) | |
| Discharge disposition | ||||
| Home | 130 (21.9) | 63 (27.0) | 67 (18.6) | 0.02 |
| Rehabilitation | 122 (20.6) | 54 (23.2) | 68 (18.9) | |
| Continuing/long-term care | 181 (30.5) | 62 (26.6) | 119 (33.0) | |
| Other | 160 (27.0) | 54 (23.2) | 106 (29.4) | |
Note: ACG = Adjusted Clinical Groups, ADG = Aggregated Diagnosis Groups.
↵* Derived from a weighted sum of the Johns Hopkins Aggregated Diagnosis Groups accumulated over the 2 years before the acute care admission.