Table 5 Other unit features and outcome: odds ratio (95% CI) adjusted for relevant case mix and clustering effect.

	No of patients	All patients		Discharged patients
		Death <90 days of admission	Inpatient death	Readmission <90 days of admission	Length of stay >7 days	Length of stay >14 days
Organisational score
1–7	2409	1.00	1.00	1.00	1.00	1.00
8–9	2522	1.02 (0.82 to 1.28)	1.20 (0.90 to 1.62)	1.04 (0.83 to 1.29)	0.88 (0.73 to 1.06)	1.00 (0.78 to 1.27)
10–14	2598	0.95 (0.76 to 1.19)	1.16 (0.86 to 1.56)	1.08 (0.87 to 1.35)	0.80 (0.66 to 0.96)	0.83 (0.66 to 1.06)
Catchment population (×103)
61–233	2534	1.00	1.00	1.00	1.00	1.00
234–359	2646	1.05 (0.84 to 1.31)	1.15 (0.86 to 1.53)	0.93 (0.75 to 1.16)	1.01 (0.84 to 1.21)	0.99 (0.78 to 1.26)
>360	2344	1.12 (0.90 to 1.41)	1.18 (0.88 to 1.59)	1.01 (0.81 to 1.25)	0.97 (0.80 to 1.18)	0.96 (0.75 to 1.23)
Patients admitted 2002
111–358	2092	1.00	1.00	1.00	1.00	1.00
364–638	2512	0.99 (0.78 to 1.24)	0.97 (0.72 to 1.30)	0.99 (0.79 to 1.23)	0.87 (0.73 to 1.06)	0.73 (0.57 to 0.93)
>638	2683	1.08 (0.86 to 1.36)	1.14 (0.84 to 1.53)	0.98 (0.78 to 1.22)	1.00 (0.82 to 1.21)	0.95 (0.75 to 1.22)
Bed numbers*
128–464	2215	1.00	1.00	1.00	1.00	1.00
465–702	2603	0.92 (0.74 to 1.16)	0.98 (0.73 to 1.32)	0.97 (0.78 to 1.21)	0.94 (0.78 to 1.13)	0.81 (0.64 to 1.04)
>702	2711	1.04 (0.83 to 1.30)	1.00 (0.75 to 1.35)	1.00 (0.80 to 1.24)	0.84 (0.70 to 1.02)	0.76 (0.60 to 0.97)
Star ratings (England)*
0–1	1750	1.00	1.00	1.00	1.00	1.00
2	2051	0.87 (0.68 to 1.12)	0.69 (0.51 to 0.94)	0.94 (0.75 to 1.19)	1.09 (0.88 to 1.34)	1.03 (0.78 to 1.36)
3	2041	0.97 (0.75 to 1.24)	0.83 (0.61 to 1.12)	1.18 (0.93 to 1.49)	0.91 (0.74 to 1.13)	0.89 (0.67 to 1.19)

*Binley's Directory of NHS Management Spring 2004 Edition, published January 2004.⁸