The relative importance of frailty, physical and cardiovascular function as exercise-modifiable predictors of falls in haemodialysis patients: a prospective cohort study

Table 6 Further analyses: goodness of fit of negative binomial regression models

Factors	Univariate			Multivariate^a
Factors	RR (95% CI)	P-value	AIC	RR (95% CI)	P-value	AIC	ΔAIC
Frailty and physical function
Frailty (yes/no)	4.10 (1.60–10.5)	0.003	185	2.53 (0.96–6.70)	0.060	149.6	*−19.1%*
Daily steps (n°)	0.99 (0.99–1.00)	0.006	142.3	1.00 (0.99–1.00)	0.036	113.2	*−20.4%*
Daily sit to stands (n°)	0.96 (0.93–0.99)	0.042	146.7	0.99 (0.95–1.03)	0.543	116.7	*− 20.4%*
Handgrip (kg)	0.94 (0.88–0.99)	0.034	188.6	0.97 (0.91–1.03)	0.330	151.8	*−19.5%*
Gait speed (m/s)	0.08 (0.01–0.62)	0.016	176.3	0.14 (0.02–1.39)	0.094	141.1	*−20.0%*
TUG (s)	1.16 (1.02–1.32)	0.021	171.7	1.10 (0.95–1.27)	0.226	138.5	*−19.3%*
Cardiovascular function
Total-BEI (%)	0.96 (0.93–0.98)	<0.001	150.8	0.96 (0.94–0.99)	0.003	149.6	*−0.8%*
CO (L/min)	0.51 (0.27–0.98)	0.043	168.6	0.58 (0.33–1.04)	0.068	165.7	*−1.7%*
OscDBP (mmHg)	0.90 (0.83–0.98)	0.010	144.1	0.92 (0.85–0.99)	0.028	142.6	*−1.0%*

Abbreviations: RR rate ratio, CI confidence interval, AIC Akaike’s information criterion, TUG timed up and go test, Total-BEI total-events baroreceptor effectiveness index, CO cardiac output, OscDBP oscillometric diastolic blood pressure
^aFrailty and physical function variables are adjusted by Total-BEI, cardiovascular function variables are adjusted by frailty

ISSN: 1471-2369