Table 3.

Stepwise multivariable regression analyses of factors associated with PROMIS PF CAT.

Dependent variables	Retained variables¹	Regression coefficient [β] (95% CI)	Standard error (SE)	P value	VIF	Semipartial R²	Adjusted R²
PROMIS PF	Sex						0.26
	Women	Reference value
	Men	4.1 (0.71–7.5)	1.7	0.018	1.0	0.01
	Working status
	Working part-time/full-time	Reference value
	Unemployed/Disabled	−12 (−18 to −7.0)	2.8	< 0.001	1.0	0.10
	Keeping house/Student/Retired	−5.6 (−9.9 to −1.4)	2.1	0.009	1.2	0.03
	Net worth
	Less than $4999	Reference value
	$5000 - $19,999	6.3 (0.35–12)	3.0	0.038	1.1	0.02
	$20,000 - $99,999	5.8 (2.1–9.5)	1.9	0.003	1.2	0.03

Bold indicates statistically significant difference; ¹ Only significant variables displayed; CI = Confidence interval; VIF = Variance Inflation Factor; PROMIS PF = Patient-Reported Outcomes Measurement Information System Physical Function; Variables applied to stepwise backward regression model (P < 0.10 on bivariate analysis): age, sex, BMI, marital status, insurance status, trauma, diabetes, musculoskeletal comorbidity, cardiovascular comorbidity, pulmonary comorbidity, other comorbidity; ADI = Area Deprivation Index national and state-specific, place in community, place in USA, level of eduction, work status, personal income, people in household, adults in household, children in household, people in household with income, total combined family income, amount of time able to live at current address and standard of living when all sources of family income are lost, financial assets, and net worth.