Table 2.
The twenty most significant variables predicting the risk for unplanned admission to hospital
| Number | % unplanned hospital admission | Crude OR | 95% CI | ||
|---|---|---|---|---|---|
| Total | 20,364 | 20.3 | – | – | |
| Categorical Variables | |||||
| Diagnoses in hospital care | |||||
| E11 Type 2 diabetes mellitus | No | 19,718 | 19.5 | 1 (ref) | – |
| Yes | 646 | 43.3 | 3.15 | (2.69–3.70) | |
| I10 Essential hypertension | No | 18,174 | 18.3 | 1 (ref) | – |
| Yes | 2190 | 36.5 | 2.57 | (2.33–2.82) | |
| I25 Chronic ischaemic heart disease | No | 19,663 | 19.5 | 1 (ref) | – |
| Yes | 701 | 42.9 | 3.11 | (2.67–3.63) | |
| I48 Atrial fibrillation and flutter | No | 19,235 | 19.0 | 1 (ref) | – |
| Yes | 1129 | 42.2 | 3.12 | (2.76–3.53) | |
| I50 Heart failure | No | 19,712 | 19.4 | 1 (ref) | – |
| Yes | 652 | 47.5 | 3.77 | (3.22–4.41) | |
| J44 Chronic obstructive pulmonary disease | No | 20,046 | 19.8 | 1 (ref) | – |
| Yes | 318 | 47.8 | 3.70 | (2.96–4.62) | |
| N18 Chronic renal failure | No | 20,179 | 20.0 | 1 (ref) | – |
| Yes | 185 | 53.0 | 4.51 | (3.37–6.04) | |
| Z92 Personal history of medical treatment | No | 19,596 | 19.3 | 1 (ref) | – |
| Yes | 768 | 44.9 | 3.41 | (2.94–3.94) | |
| Z95 Presence of cardiac and vascular implants and grafts | No | 19,741 | 19.6 | 1 (ref) | – |
| Yes | 623 | 42.2 | 3.00 | (2.55–3.53) | |
| Diagnoses in open-clinic visits | |||||
| I25 Chronic ischaemic heart disease | No | 18,294 | 19.2 | 1 (ref) | – |
| Yes | 2070 | 30.0 | 1.80 | (1.63–1.99) | |
| I48 Atrial fibrillation and flutter | No | 17,808 | 18.5 | 1 (ref) | – |
| Yes | 2556 | 32.4 | 2.11 | (1.92–2.31) | |
| I50 Heart failure | No | 18,936 | 18.9 | 1 (ref) | – |
| Yes | 1428 | 38.9 | 2.73 | (2.44–3.06) | |
| R06 Abnormalities of breathing | No | 19,445 | 19.5 | 1 (ref) | – |
| Yes | 919 | 35.8 | 2.30 | (1.99–2.64) | |
| R07 Pain in throat and chest | No | 19,504 | 19.6 | 1 (ref) | – |
| Yes | 860 | 36.3 | 2.34 | (2.02–2.70) | |
| Z51 Other medical care | No | 19,431 | 19.5 | 1 (ref) | – |
| Yes | 933 | 37.3 | 2.46 | (2.14–2.82) | |
| Continuous Variablesa, b | |||||
| Age | 81 | (75–106) | 1.05 | (1.04–1.05) | |
| Emergency room (ER) visits | 0 | (0–25) | 1.52 | (1.47–1.57) | |
| Non-physician visits | 4 | (0–210) | 1.02 | (1.02–1.03) | |
| Physician visits | 3 | (0–100) | 1.08 | (1.07–1.09) | |
| Previous in-ward hospital stays | 0 | (0–16) | 1.56 | (1.50–1.62) | |
aMedians were reported as appropriate for continuous variables. bRange was reported as appropriate for continuous variables. OR Odds Ratio, CI Confidence interval. Hospital admissions within 12 months from the training sample (n = 20,364) expressed as crude odds ratios and 95% confidence intervals (CI) from univariable analysis. Variables are sorted by name and all p-values < 0.001