The potential risk of using historic claims to set bundled payment prices: the case of physical therapy after lower extremity joint replacement

Table 3 Multilevel linear model predicting PT use after TKA surgery (2015–2018)

	Model A		Model B
	β	SE	β	SE
Predisposing factors
Sex (male)			0.38*	0.182
SES^a	−0.28**	0.067	−0.28**	0.067
Enabling factors
Supplementary insurance (yes)			7.47**	0.498
Contract type PT
- Uncontracted (ref)			0
- Standard			1.24	0.699
- Basic			1.62*	0.486
- Plus			1.63**	0.494
Number of non-TJA-related PT sessions between 6 to 12 months prior to surgery			0.11**	0.012
Need factors
Number of TJA-related PT sessions in 6 months prior to surgery	0.20**	0.011	0.20**	0.011
Number of pre-operative homecare hours	−0.05*	0.016	− 0.05*	0.016
Constant	19.88**	0.318	11.02**	0.744
-2 log likelihood	116,840.3		116,240.1

Abbreviations: SE standard error, PT physical therapy, TKA total knee arthroplasty, TJA total joint arthroplasty
*p < 0.05, **p < 0.001
^ahigher score means lower socioeconomic status

ISSN: 1472-6963