Predictors of length of stay and remaining in hospital beyond being medically fit for discharge
| Variable | Length of stay (admissions>7 days) N=2295 | Length of stay (≤ 30 days) N=22 74* | Medically fit for discharge N=22 75† |
| OR (95% CI) | Coef (95% CI) | OR (95% CI) | |
| Age at admission | 1.06 (1.04 to 1.07)* | 0.08 (0.07 to 0.09)* | 1.07 (1.05 to 1.09)* |
| Sex (female vs male) | – | 0.36 (0.06 to 0.67)* | 1.71 (1.19 to 2.47)* |
| Deprivation (Inedx Multiple Deprivation score) | |||
| 1 (least deprived) | 1.00 | 0.00 | 1.00 |
| 2 | 1.74 (1.22 to 2.47)* | 0.65 (0.26 to 1.04)* | 1.76 (1.05 to 2.96)* |
| 3 | 1.74 (1.18 to 2.58)* | 0.80 (0.32 to 1.28)* | 1.84 (1.05 to 3.23)* |
| 4 | 1.54 (1.04 to 2.28)* | 0.75 (0.33 to 1.16)* | 2.07 (1.20 to 3.57)* |
| 5 (most deprived) | 2.03 (1.34 to 3.05)* | 0.98 (0.47 to 1.48)* | 2.27 (1.27 to 4.06)* |
| Comorbidities (weighted Charlson Comorbidities index) | |||
| 0 | 1.00 | 0.00 | 1.00 |
| 1–2 | 1.40 (1.08 to 1.81)* | 0.63 (0.31 to 0.94)* | 1.89 (1.32 to 2.71)* |
| 3–4 | 1.85 (1.20 to 2.86)* | 1.42 (0.55 to 2.29)* | 2.56 (1.48 to 4.42)* |
| ≥5 | 3.03 (1.14 to 8.05)* | 2.48 (0.15 to 4.81)* | – |
| Time since last discharge | |||
| 0–2 months | 1.00 | 0.00 | 1.00 |
| 2–12 months | 0.67 (0.47 to 0.95)* | −0.65 (−1.29 to −0.02)* | 0.97 (0.60 to 1.57) |
| 12 months or more | 0.41 (0.27 to 0.61)* | −1.45 (−2.06 to −0.84)* | 0.53 (0.30 to 0.92)* |
| Never | 0.38 (0.28 to 0.53)* | −1.49 (−2.05 to −0.93)* | 0.53 (0.33 to 0.84)* |
| Emergency over elective admissions ratio | – | – | – |
| Non-Elective admissions | – | – | – |
| Non-Elective occupied beds | – | – | – |
| Admission hour category | |||
| 06.00–12.00 | 1.00 | 0.00 | 1.00 |
| 12.00–18.00 | 1.81 (1.23 to 2.66)* | 0.79 (0.17 to 1.41)* | 1.56 (0.91 to 2.66) |
| 18.00-06:00 | 77.21 (8.01 to 744.20)* | 7.55 (2.85 to 12.24)* | 8.11 (1.74 to 37.75)* |
| Year of admission | |||
| 2016 | 1.00 | 0.00 | 1.00 |
| 2017 | 1.66 (0.96 to 2.86) | 0.20 (−0.27 to 0.67) | 2.95 (1.14 to 7.64)* |
| 2018 | 1.96 (1.12 to 3.42)* | 0.47 (−0.04 to 0.99) | 3.89 (1.49 to 10.12)* |
| 2019 | 1.14 (0.65 to 1.99) | −0.21 (−0.71 to 0.30) | 2.32 (0.88 to 6.09) |
| Day of admission | |||
| Sunday | – | – | – |
| Monday | 1.00 | – | – |
| Tuesday | 0.89 (0.62 to 1.26) | – | – |
| Wednesday | 0.59 (0.40 to 0.88)* | – | – |
| Thursday | 0.66 (0.45 to 0.97)* | – | – |
| Friday | 0.78 (0.54 to 1.13) | – | – |
| Saturday | 0.20 (0.06 to 0.73)* | – | – |
| Season of admission | |||
| Winter (Dec–Feb) | 1.00 | – | – |
| Spring (Mar–May) | 1.14 (0.80 to 1.61) | – | – |
| Summer (Jun–Aug) | 0.73 (0.50 to 1.06) | – | – |
| Autumn (Sep–Nov) | 0.90 (0.64 to 1.28) | – | – |
| C-statistic (95% CI) | R2 | C-statistic (95% CI) | |
| 0.72 (0.69 to 0.74) | 0.130 | 0.74 (0.71 to 0.78) | |
*included sample N=2274 patients with length of stay ≤30 days.
†included sample N=2295 minus those excluded when CCI score ≥5 was dropped from the model (N=20).