Factors influencing inpatient rehabilitation length of stay following revision hip replacements: a retrospective study

Table 4 Results of the regression analyses (Dependent variable was length of stay in days)

		Step 1		Step 2*		Step 3*		Step 4*
		B1 only		B1 & 2		B1, 2 & 3		B1, 2, 3 & 4
Block (B)	Variable
		Adjusted β, p		Adjusted β, p		Adjusted β, p		Adjusted β, p
1. Socio-demographic variables	Age	.20,	.001	.14,	.022	.17,	.006	.08,	.225
	Female	.20,	.001	.17,	.005	.24,	<.001	.19,	.003
	Had Support	-.12,	.044	-.15,	.010	-.04,	.489
2. Pre-surgery related variables	Redo revision (≥2)			.20,	.001	.11,	.085	.12,	.048
	Had 2 or more prior L/Es surgeries			.10,	.076	.16,	.008	.14,	.027
	Had one or more comorbid conditions			.10,	.106
3. Surgery related variables	Acetabular only revision					.00		.00
	Acetabular & femoral only revision					.22,	.003	.11,	.143
	Femoral only revision					.28,	<.001	.17,	.025
4. Post-surgery related variables	P/WBAT on admission							-.12,	.058
	Admission Hemoglobin							-.01,	.871
	Had complication(s)							.02,	.712
	Days after THR on admission							.07,	.316
	Admission motor FIM							-.31,	<.001

*Only variables significant at p < .10 at the previous step were retained and entered in the step.
L/Es. lower extremities; P/WBAT, partial or weight bearing as tolerated; THR, total hip replacement; FIM, Functional Independence Measures

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