Table 3 Association (OR coefficients, and 95 % confidence intervals, CI) of functional impairment with the variables of interest according to logistic multivariable regression model. All the covariates were entered simultaneously into the regression model. (Study center: Catholic University, Rome, 2007–2015)

Age (years)

1.05

.98–1.13

1.01

.95–1.07

Sex (female)

.92

.28–3.05

2.77

.69–11.05

Charlson comorbidity index score

1.28

.92–1.78

1.26

.86–1.85

Mini Mental State Examination

.97

.83–1.13

.78

.58–1.06

Serum creatinine (mg/dL)

.85

.66–1.10

.78

.57–1.06

Serum albumin (g/dL)

.91

.15–5.66

.89

.08–9.91

Time of recovery after hemodialysis (min)

1.21

.72–2.05

Geriatric Depression Scale

1.12

1.02–1.23

1.16

1.02–1.33