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Table 3 Linear regression analysis with baPWV as the dependent variable

From: Association between environmental particulate matter and arterial stiffness in patients undergoing hemodialysis

Variable Unstandardized coefficients Standardized coefficients P value
B Std. error Beta
Univariate     
 Fasting glucose (mg/dL) 2.758 0.873 0.272 0.002
 Gender (female as reference group) 330.763 114.639 0.250 0.005
 Age (y) 24.567 5.426 0.375 <0.001
 Log Al (ng/mL) 417.573 181.613 0.201 0.023
 DM 447.395 130.649 0.293 0.001
 Intra-dialytic hypotension −334.493 140.764 −0.209 0.019
 Log hsCRP (mg/L) 308.112 116.982 0.229 0.010
 SO2 (ppb) 65.722 27.617 0.208 0.019
 PM10 (ug/m3) 23.512 10.043 0.205 0.021
 Heart rate (/min) 33.727 4.647 0.545 <0.001
 Log triglyceride (mg/dL) 60.834 199.684 0.027 0.761
 Hb (g/dL) 12.615 44.066 0.026 0.775
 Alb (g/dL) −76.401 179.385 −0.038 0.671
 Total cholesterol (mg/dL) −0.373 1.510 −0.022 0.805
 Calcium (mg/dL) 27.205 59.121 0.041 0.646
 Phosphorous (mg/dL) −56.563 40.098 −0.125 0.161
 Calcium-phosphorous product (mg/dL)2 −5.512 3.573 −0.137 0.125
 Body Mass Index (kg/m2) 22.999 16.460 0.124 0.165
 Urea reduction rate −1100.164 999.288 −0.098 0.273
 Kt/V −244.671 172.193 −0.127 0.158
 Net protein catabolic rate (g/day/kg body weight) −197.253 156.598 −0.116 0.210
 Hemodialysis duration (months) −1.334 0.936 −0.126 0.156
 NO2 (ppb) −5.595 15.351 −0.033 0.716
 CO (ppm) −163.429 295.340 −0.050 0.581
 PM2.5 (ug/m3) 22.878 20.493 0.099 0.266
 O3 (ppb) 23.474 20.080 0.104 0.245
 NO (ppb) −1.728 7.433 −0.021 0.817
 ARB/ACEi 246.279 173.512 0.216 0.158
 CCB −7.177 145.965 −0.004 0.961
 Beta blocker 47.806 139.934 0.031 0.733
Multivariate     
 Heart rate (/min) 26.849 4.775 0.433 <0.001
 Intra-dialytic hypotension −317.174 112.815 −0.198 0.006
 Age (y) 12.615 4.978 0.193 0.013
 Log Al (ng/mL) 297.553 146.640 0.144 0.045
 PM10 (ug/m3) 17.517 8.234 0.150 0.035
  1. DM = diabetes mellitus, SBP = systolic blood pressure, log Al = log-transformed aluminum, log hsCRP = log-transformed high sensitivity C reactive protein, Log triglyceride = log-transformed triglyceride, SO2 = environmental sulfur dioxide, PM 10  = particulate matter with aerodynamic diameter <10 mm, O 3  = environmental ozone, Hb = hemoglobulin, Alb = albumin, NO 2  = environmental nitrogen dioxide, CO = environmental carbon dioxide, PM 2.5  = particulate matter with aerodynamic diameter <2.5 mm, NO = environmental nitrogen oxide, Kt/V = a number used to quantify hemodialysis treatment adequacy, ARB = angiotensin receptor blocker, ACEi = angiotensin-converting-enzyme inhibitor, CCB = calcium channel blocker