Table 5. Predictors of inpatient length of stay among 842 patients with HIV infection from New South Wales and Western Australia in the Australian HIV Observational Database cohort, 1999–2007.

	Univariate β̂ (SE)	p	Multivariate β̂ (SE)	p
Total
Age (per 5-year increase)^a	0.05 (0.02)	0.028	0.08 (0.02)	<0.001
Sex (female)	−0.10 (0.21)	0.629	–
Hepatitis B virus coinfection	−0.03 (0.27)	0.900	–
Hepatitis C virus coinfection	0.24 (0.14)	0.085	0.32 (0.14)	0.023
HIV exposure (Homosexual contact^b)	−0.02 (0.13)	0.878
Time since first positive HIV test (years)^a
0–4	Reference
5–7	0.21 (0.12)	0.070	–
8–11	0.13 (0.10)	0.205	–
≥12	0.14 (0.10)	0.136	–
Prior AIDS	0.17 (0.11)	0.108	–
CD4 cell count (per 100 cells increase, cells/μl)^a	−0.10 (0.02)	<0.001	−0.08 (0.02)	<0.001
HIV viral load (per 1 log₁₀ increase, copies/ml)^a	0.15 (0.02)	<0.001	0.13 (0.02)	<0.001
Number of drug classes ever^a
≤1	Reference
2	0.03 (0.15)	0.835	–
3	0.10 (0.15)	0.494	–
4	−0.24 (0.33)	0.464	–
AIDS event after baseline^a	0.17 (0.11)	0.108
Calendar year^a
1999–2000^c	Reference		Reference
2001	−0.09 (0.13)	0.499	−0.02 (0.13)	0.891
2002	−0.07 (0.14)	0.594	−0.03 (0.13)	0.849
2003	0.19 (0.13)	0.133	0.20 (0.13)	0.114
2004	−0.04 (0.14)	0.783	−0.01 (0.14)	0.938
2005	−0.07 (0.14)	0.605	−0.006 (0.14)	0.966
2006–2007^d	0.16 (0.12)	0.195	0.25 (0.12)	0.044

^†

Model adjusted for state.

Time-dependent covariate.

Injecting drug use also reported for some participants in this group.

Includes data from 1 July 1999 to 31 December 2000.

Includes data from 1 January 2006 to 31 March 2007.