Appendix Table 3B.

Final predictors for 30-day all-cause re-hospitalization where age and Charlson Index were modeled as categorical variables

Parameter/Predictor	β-coefficient	SE	p value
Intercept	−1.773	0.065	<.0001
Age, years (reference: <65)
65–69	0.038	0.064	0.55
70–74	0.020	0.060	0.74
75–79	0.023	0.058	0.69
80–84	0.003	0.056	0.96
85–89	−0.063	0.057	0.27
90–94	−0.111	0.060	0.062
≥95	−0.285	0.072	<.0001
Gender (reference: women)
Men	0.082	0.023	0.0004
Race/Ethnicity (reference: Non-Hispanic white)
Non-Hispanic black	0.036	0.036	0.32
Hispanic	−0.011	0.062	0.86
Other	0.213	0.085	0.012
Unknown	−0.023	0.069	0.73
Marital status (reference: Married)
Widowed	−0.021	0.027	0.43
Separated/divorced	−0.081	0.041	0.051
Never married	−0.090	0.043	0.036
Unknown	0.014	0.078	0.86
Medicare and Medicaid dual enrollee	0.023	0.029	0.44
Charlson index (reference: 1–4)
5–7	0.211	0.024	<.0001
>7	0.270	0.0426	<.0001
Length of index hospital stay, days (reference: 3–4)
5–6	0.132	0.029	<.0001
7–9	0.238	0.030	<.0001
10–13	0.376	0.036	<.0001
≥ 14	0.533	0.038	<.0001
No. of any hospitalizations within 6 months before index hospitalization (ref: 0)
1	0.194	0.025	<.0001
≥ 2	0.506	0.029	<.0001
Depression severity (reference: none)
Mild	0.023	0.028	0.41
Moderate	0.027	0.049	0.58
Moderately severe	0.036	0.089	0.68
Severe	0.216	0.159	0.18
Unknown	1.669	0.069	<.0001
Physical limitations (reference: normal or minimal limitation)
Moderate limitation	0.151	0.028	<.0001
Physical dependency	0.424	0.034	<.0001