Table 3.

Independent Associations of Short Physical Performance Battery Impairment with Kidney Transplant Length of Stay, Baltimore, Maryland, 2009–2016

Modela	Association between SPPB and LOS
Conventional Generalized Gamma (Time-to-Discharge)	Relative Time (95% CI)
	Impaired Vs. Unimpairedb	1.13 (1.05, 1.21)
Logistic Regression	Odds Ratio (95% CI)
(LOS ≥14 Days)	Impaired Vs. Unimpaired	1.90 (1.23, 2.94)
	One-point decrease in SPPB composite score	1.16 (1.08, 1.27)

Abbreviations: CI Confidence Interval, LOS Length of Stay, SE Standard Error, SPPB Short Physical Performance Battery

^aAdjusted for age, sex, race, body mass index, years on dialysis, cause of end-stage renal disease, and donor type. GG model parameters were β = 1.87, σ = 0.41, κ = −0.56 and β = 1.75, σ = 0.41, κ = −0.56 for the impaired and unimpaired recipients, respectively. Parameters for the GG model define the shape of the curve; β (a location parameter that is related to median time to discharge), σ (a dispersion or scale parameter related to the interquartile ratio: third quartile divided by the first quartile of lengths of stay), and κ (shape)

^bSPPB impairment was defined as an SPPB score ≤ 10