Ten-Year Trends and Predictors of Unplanned Hospitalisation in Community-Dwelling Older People Receiving Home-Based Care

Table 5

Logistic regression modelling of factors associated with an unplanned hospitalisation. Abbreviations: OR = odds ratio, CI = confidence interval, IRSD = index of relative socioeconomic disadvantage.

	Univariate			Multivariable			Multivariable (bootstrapped 1,000 samples)
	OR	95% CI		OR	95% CI		OR	95% CI
Unique client identifier number	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99	0.99
Charlson Comorbidity Index Score	1.26	1.25	1.27	1.21	1.20	1.22	1.21	1.20	1.22
Total hours of home care contact time	2.07	2.05	2.09	1.97	1.95	2.00	1.97	1.95	2.00
Age group
65–69	1.00			1.00			1.00
70–74	1.10	1.05	1.16	1.10	1.04	1.16	1.10	1.04	1.16
75–79	1.22	1.17	1.28	1.15	1.09	1.21	1.15	1.09	1.21
80–84	1.42	1.36	1.48	1.29	1.23	1.36	1.29	1.23	1.36
85–89	1.74	1.66	1.81	1.51	1.44	1.59	1.51	1.44	1.59
90+	1.98	1.89	2.07	1.73	1.63	1.82	1.73	1.63	1.83
Gender
Female	1.00			1.00			1.00
Male	1.16	1.13	1.19	1.32	1.29	1.36	1.32	1.29	1.36
Other/not stated	0.30^a	0.07	1.26	0.28^c	0.04	2.26	0.28^f	0.08	0.98
Referral source
Hospital	1.00			1.00			1.00
Individuals	1.13	1.07	1.17	0.87	0.84	0.91	0.87	0.83	0.91
Doctor	1.07	1.04	1.11	0.72	0.69	0.75	0.72	0.69	0.75
Palliative care	1.53	1.45	1.62	1.21	1.13	1.29	1.21	1.13	1.30
Subacute care	1.08	1.05	1.12	0.93	0.89	0.96	0.93	0.89	0.96
Government and referral services	0.52	0.48	0.55	0.51	0.47	0.55	0.51	0.48	0.55
Residential aged care	1.00^b	0.90	1.11	0.79	0.70	0.89	0.79	0.70	0.89
Other	0.88	0.84	0.92	0.74	0.70	0.78	0.74	0.70	0.78
Carer situation
Carer not required	1.00			1.00			1.00
No carer (carer required)	2.05	1.98	2.12	1.50	1.44	1.55	1.50	1.44	1.55
Has informal carer	1.93	1.88	1.99	1.73	1.67	1.79	1.73	1.67	1.79
Living situation
Family	1.00			1.00			1.00
Alone	1.29	1.26	1.32	1.22	1.18	1.26	1.22	1.19	1.26
Special purpose accommodation	2.27	2.13	2.43	1.91	1.77	2.06	1.91	1.77	2.05
Others (non-family)	1.28	1.18	1.38	1.21	1.12	1.32	1.21	1.11	1.32
IRSD quintiles
1 (low disadvantage)	1.00			1.00			1.00
2	1.10	1.06	1.15	1.02^d	0.98	1.07	1.02^g	0.97	1.08
3	1.10	1.06	1.14	1.09	1.04	1.14	1.09	1.04	1.14
4	1.08	1.04	1.12	1.02^e	0.98	1.06	1.02^h	0.98	1.06
5 (high disadvantage)	1.28	1.24	1.32	1.10	1.06	1.14	1.10	1.05	1.14
Language
English	1.00			1.00			1.00
Language other than English	0.83	0.81	0.85	0.88	0.85	0.91	0.88	0.85	0.91
Cognitive dysfunction
Not present	1.00			1.00			1.00
Present	1.36	1.32	1.4	1.09	1.05	1.13	1.09	1.05	1.13

values all <0.001 unless specified; ^a, ^b, ^c, ^d, ^e, ^f, ^g, ^h.