Table 2.

Logistic regression models of UFR on IDH.

Model	HR	95%CI	p value
Ultrafiltration (continuous variable, per 1ml/h/kg increase)
Unadjusted	1.16	1.08–1.26	<.001
Model 1	1.24	1.12–1.39	<.001
Model 2	1.20	1.03–1.40	.017
Model 3	1.20	1.04–1.40	.016
Model 4	1.22	1.00–1.47	.042
Model 5	1.65	1.05–2.61	.031
Model 6	2.37	1.21–4.62	.012

UFR: ultrafiltration rate; IDH: intradialytic-hypotension.

Model 1: adjusted for demographic data (age, sex, and body mass index).

Model 2: adjusted for Model 1 + dialysis information (interdialytic weight gain, residual renal function, dialysis vintage and single-pool Kt/V).

Model 3: adjusted for Model 2 + comorbid conditions (history of primary hypertension, coronary heart disease, and diabetes).

Model 4: adjusted for Model 3 + biochemical data (serum albumin, pre-albumin, creatinine and hemoglobin).

Model 5: adjusted for Model 4 + cardiac conditions (NT- proBNP, left ventricular mass index, left ventricular ejection fraction, and left atrium diameter index).

Model 6: adjusted for Model 5+ predialysis blood pressure (predialysis systolic blood pressure and diastolic blood pressure).