Factors associated with residual urine volume preservation in patients undergoing hemodialysis for end-stage kidney disease in Kinshasa

Table 3 Factors significantly associated with the preservation/decrease of residual urine volume (ml/day) over time

	Model 1			Model 2			Model 3			Model 4
	β	SE	p	β	SE	p	β	SE	p	β	SE	p
Intercept	679.6	33.5	< 0.001	595.7	55.9	< 0.001	595.1	55.3	< 0.001	595.6	55.6	< 0.001
Time (month)	−36.6	6.5	< 0.001	−37.5	6.8	< 0.001	−40.5	10.1	< 0.001	−40.8	8.8	< 0.001
Time*time (month²)	1.4	0.5	0.002	1.4	0.5	0.002	1.7	0.9	0.047	1.7	0.7	0.019
ACE inhibitors, yes vs no				219.5	62.1	< 0.001	237.5	62.5	< 0.001	236.2	62.7	< 0.001
Left ventricular hypertrophy, yes vs no				−133.9	61.2	0.029	− 148.4	61.8	0.016	−149.1	62.1	0.016
Interstitial initial nephropathy, yes vs no				291.8	108.9	0.007	256.8	108.1	0.018	262.4	108.6	0.016

Model 1: Fixed effects: intercept, time, time²; Random effects: intercept, time; covariance structured: unstructured; AIC: 6756.8. Model 2 (main model): model 1 + baseline covariates (age, sex, diabetes mellitus, hypertension, diastolic blood pressure, diuretics, ACE inhibitors, angiotensin receptor blockers, hypovolemia, interstitial initial nephropathy, left ventricular hypertrophy and initial hemodialysis characteristic) as fixed effects; AIC: 6410.8. Model 3: model 2 with exchangeable covariance structure; AIC: 6427.3. Model 4: model 2 with autoregressive residual (1) covariance structure; AIC: 6420.4
Abbreviation: ACE angiotensin conversion enzyme, SE standard error, AIC Akaike information criterion

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