Table 2.

Univariate (A) and multivariate (B) Cox regressions for predictors of all causes of mortality in according to the evolution of body weight during the first year of PD treatment.

A- Univariate analysis – all causes of mortality.
Variable	Hazard Ratio	95% CI	χ2	p-value
<−3.1%, vs 0.12 to <3.1%	2.10	1.47-3.02	4.06	<0.001
−3.1 to <0.12% vs 0.12 to <3.1%	1.18	0.81-1.77	0.84	0.41
+3.1 to <+7.1% vs 0.12 to <3.1%	1.08	0.73- 1.61	0.41	0.68
>+7.1%. vs 0 to 0.12 to <3.1%	0.85	0.56-1.29	0.74	0.46
B- Multivariate -all cause of mortality adjusted for age, gender, CVD, DM, APD/CAPD, RRT and calendar year
<−3.1%, vs 0.12 to <3.1%	1.94	1.35 - 2.8	3.59	<0.001
−3.1 to <0.12% vs 0.12 to <3.1%	1.29	0.86 - 1.95	1.24	0.21
+3.1 to <+7.1% vs 0.12 to <3.1%	1.10	0.74 - 1.63	0.47	0.63
>+7.1% vs 0 to 0.12 to <3.1%	0.81	0.54 - 1.24	0.94	0.34

Indicated are Hazard Ratios (HRs) for all-cause mortality [and 95% confidence intervals (CI)] for patients with weight evolution <−3.1%, −3.1 to <0.12%, +3.1 to <+7.1% and >+7.1%. The patients with weight evolution between 0.12 to <3.1% were considered as reference. A p-value with significance level <0.05. The models adjust for potential confounders i.e. baseline comorbidities (cardiovascular disease (CVD), and diabetes mellitus (DM), automated peritoneal dialysis or continuous ambulatory peritoneal dialysis, renal replacement therapy, calendar year (CY) (2005, 2006, 2007).