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Table 2 Univariate and multivariate Linear Regression model for predictors of sleep quality (PSQI scores)

From: Association between sleep quality and cardiovascular damage in pre-dialysis patients with chronic kidney disease

  Standardized coefficient β Crude P value Adjusted standardized coefficient β AdjustedP valueb
Age (years) 0.149 0.004 0.155 0.004
Duration of CKD (months) 0.104 0.054 - -
Male vs. female 0.024 0.637 - -
Current smoker (no vs. yes) -0.046 0.283   
Alcohol intake (no vs. yes) -0.039 0.368   
BMI (kg/m2) 0.010 0.863   
Diabetes (no vs. yes) 0.086 0.116 - -
Proteinuria (g/24 h) -0.047 0.398   
Hemoglobin (g/L) -0.174 0.004 - -
Albumin (g/L) 0.065 0.224   
eGFR (ml/min/1.73 m2) -0.224 <0.001 - -
Cholesterol (mmol/L) -0.031 0.575   
Triglyceride (mmol/L) -0.033 0.543   
LDL-C (mmol/L) -0.054 0.339   
Calcium (mg/dL) 0.073 0.152   
Phosphate (mmol/L) 0.140 0.007 - -
iPTH (pg/mL) 0.139 0.018 - -
Serum uric acid (umol/L) 0.029 0.587   
SBP (mmHg) 0.030 0.585   
DBP (mmHg) 0.064 0.218   
BDI-SF score 0.413 <0.001 0.427 <0.001
  1. (aall of the variables were adjusted by age, sex. bThe age, sex, duration of CKD, diabetic vs. non diabetic status, eGFR, hemoglobin, phosphate, iPTH and BDI-score were included in the multivariate model (stepwise method). -Without significance and not able to be included in the multivariate model. eGFR: estimated glomerular filtration rate; iPTH: intact parathyroid hormone, SBP: systolic blood pressure; DBP: diastolic blood pressure; BDI-SF: short form of the Beck Depression Inventory).