Table 4.
Results of adjusted regression models
| Relative difference | Absolute difference | P value | Interaction test P value* |
|||
| Outcomes over the follow-up period | Point estimate | 95% CI | Point estimate | 95% CI | ||
| Residential care homes | ||||||
| Potentially avoidable admissions | 0.50 | (0.30 to 0.82) | −0.20 | (−0.28 to –0.07) | 0.007 | 0.020 |
| Emergency admissions | 0.60 | (0.42 to 0.86) | −0.37 | (−0.54 to –0.13) | 0.004 | 0.005 |
| A&E attendances | 0.57 | (0.40 to 0.81) | −0.57 | (−0.80 to –0.25) | 0.001 | 0.008 |
| Hospital bed days† | 0.81 | (0.43 to 1.53) | −0.007 | (−0.022 to 0.021) | 0.467 | Count: 0.858 |
| Zero: 0.135 | ||||||
| Outpatient attendances | 1.28 | (0.88 to 1.86) | 0.41 | (−0.18 to 1.26) | 0.169 | 0.266 |
| Deaths outside hospital | 1.25 | (0.54 to 2.92) | 17.3% | (−31.8% to 132.7%) | 0.608 | 0.558 |
| Nursing homes | ||||||
| Potentially avoidable admissions | 1.17 | (0.76 to 1.81) | 0.03 | (−0.05 to 0.16) | 0.484 | |
| Emergency admissions | 1.15 | (0.85 to 1.56) | 0.08 | (−0.08 to 0.30) | 0.352 | |
| A&E attendances | 1.04 | (0.78 to 1.38) | 0.03 | (−0.15 to 0.26) | 0.806 | |
| Hospital bed days | 1.07 | (0.64 to 1.80) | 0.002 | (−0.012 to 0.027) | 0.790 | |
| Outpatient attendances | 0.97 | (0.71 to 1.32) | −0.06 | (−0.60 to 0.67) | 0.840 | |
| Deaths outside hospital | 1.00 | (0.40 to 2.49) | 0.00 | (−53.1% to 131.9%) | 0.992 | |
All relative differences are rate ratios, apart from deaths outside hospital and deaths, which are ORs. See online supplementary file 2 for a list of covariates each outcome was adjusted for and for model fit statistics. Absolute differences are calculated by first calculating the relative difference, then multiplying the relative difference with the crude rate in the matched control group, and then comparing the resulting rate to the crude rate.
*Interaction test of residential versus nursing homes.
†The absolute difference in hospital bed days shows the difference in the proportion of hospital bed days out of the period residents were followed up in the study. The interaction model estimating hospital bed days is a Hurdle model and produces separate effect estimates on whether a resident is hospitalised or not (‘Zero’ part) and on the number of hospital bed days following hospitalisation (‘Count’ part).
A&E, Accident & Emergency.