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Table 4.

Mean difference (95% CI) of left ventricular measurements per a 2-fold increase in urinary arsenic levels by blood pressure status at baseline and at follow-up. Mean (95% CI) of annual change during follow-up for the same comparison.

Prehypertension/HypertensionNormal Blood Pressure
NMD at BaselineAnnual ChangeMD at Follow-UpNMD at BaselineAnnual ChangeMD at Follow-Up
LV geometry
 LV mass index, g/m26202.36 (1.17 to 3.56)−0.15 (−0.28 to−0.01)1.64 (0.47 to 2.80)6320.88 (−0.23 to 1.99)−0.06 (−0.19 to 0.07)0.58 (−0.49 to 1.65)
 Left atrial systolic diameter, cm6290.03 (−0.00 to 0.06)0.00 (−0.00 to 0.00)0.03 (−0.00 to 0.06)6350.03 (0.00 to 0.06)−0.00 (−0.01 to 0.00)0.02 (−0.01 to 0.05)
 LV internal diameter, cm6240.03 (−0.01 to 0.06)−0.00 (−0.00 to 0.00)0.02 (−0.01 to 0.05)634−0.01 (−0.04 to 0.02)−0.00 (−0.01 to 0.00)−0.02 (−0.05 to 0.00)
 Interventricular septum, cm6290.02 (0.01 to 0.03)−0.00 (−0.01 to 0.00)0.01 (−0.00 to 0.02)6370.01 (0.00 to 0.02)−0.00 (−0.01 to 0.00)0.01 (−0.00 to 0.01)
 LV posterior wall thickness, cm5430.02 (0.02 to 0.03)−0.00 (−0.00 to−0.00)0.01 (0.01 to 0.02)5530.02 (0.01 to 0.03)−0.00 (−0.00 to 0.00)0.01 (0.01 to 0.02)
 Relative wall thickness6230.00 (−0.00 to 0.01)−0.00 (−0.00 to 0.00)0.00 (−0.00 to 0.01)6340.01 (0.00 to 0.01)−0.00 (−0.00 to 0.00)0.00 (0.00 to 0.01)
LV functioning
 Heart rate, bpm616−0.57 (−1.45 to 0.32)0.11 (−0.04 to 0.27)−0.01 (−0.83 to 0.82)6230.67 (−0.24 to 1.58)−0.06 (−0.28 to 0.17)0.39 (−0.45 to 1.24)
 Stroke volume, mL6071.89 (0.72 to 3.07)−0.28 (−0.50 to −0.06)0.49 (−0.63 to 1.62)6211.20 (0.1 5 to 2.25)−0.24 (−0.47 to −0.00)0.02 (−0.97 to 1.01)
 Ejection fraction, %6230.25 (−0.16 to 0.67)0.01 (−0.06 to 0.07)0.29 (−0.10 to 0.68)6340.45 (0.01 to 0.88)−0.05 (−0.11 to 0.01)0.21 (−0.20 to 0.61)
 Mitral E-velocity, cm/S617−0.37 (−1.47 to 0.73)0.29 (0.04 to 0.53)1.07 (0.07 to 2.06)622−0.68 (−1.74 to 0.38)0.28 (0.03 to 0.52)0.72 (−0.24 to 1.68)
 Mitral A-velocity, cm/s616−0.60 (−1.47 to 0.26)0.19 (−0.01 to 0.39)0.36 (−0.42 to 1.14)621−0.21 (−1.14 to 0.72)0.00 (−0.19 to 0.20)−0.20 (−1.05 to 0.65)
 E/A ratio6160.01 (−0.01 to 0.04)0.00 (−0.00 to 0.01)0.01 (−0.01 to 0.04)621−0.02 (−0.05 to 0.01)0.01 (0.00 to 0.01)0.02 (−0.01 to 0.05)
 Atrial filling fraction589−0.00 (−0.01 to 0.00)0.00 (0.00 to 0.00)0.00 (−0.00 to 0.01)595−0.00 (−0.01 to 0.00)−0.00 (−0.00 to 0.00)−0.00 (−0.01 to 0.00)
 Deceleration time, ms616−1.14 (−3.98 to 1.71)0.44 (−0.23 to 1.11)1.05 (−1.56 to 3.66)622−0.92 (−3.94 to 2.09)0.77 (0.00 to 1.54)2.94 (0.20 to 5.67)
 Isovolumic relaxation time, ms595−0.76 (−1.62 to 0.09)0.25 (0.06 to 0.44)0.50 (−0.29 to 1.28)619−0.78 (−1.60 to 0.04)0.16 (−0.04 to 0.36)0.02 (−0.72 to 0.76)

Model was adjusted for age, sex, region, smoking (never, former, current), body mass index (continuous), dyslipidemia (no/yes), fasting glucose level (continuous), estimated glomerular filtration rate (continuous), systolic BP (continuous), and BP treatment (no/yes). BP indicates blood pressure; CI, confidence interval; E/A, early peak rapid filling velocity to peak atrial filling velocity; LV, left ventricular; and MD, mean difference.

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