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. Author manuscript; available in PMC: 2012 Dec 1.
Published in final edited form as: Hypertension. 2011 Oct 24;58(6):1001–1007. doi: 10.1161/HYPERTENSIONAHA.111.181248

Table 3.

Mean differences in blood pressure, potassium, and electrocardiographic LVH through 48 and 84 months for individual SI participants who were hypertensive at baseline, and comparison with differences between C- and H-clinic SI-UC differences through 48 months.

Through 48 Months Through 84 Months SI-UC Difference for
C- vs H-Clinics
(Through 48 Months)†
Variable C-H
difference* 		95% CI P-
value		 C-H
difference* 		95% CI P-
value
Systolic blood pressure
(mm Hg)		 −1.6 −2.1, −1.1 < .001 −1.7 −2.1, −1.3 < .001 −1.8
Diastolic blood pressure
(mm Hg)		 −0.7 −1.0, −0.4 < .001 −0.8 −1.0, −0.5 < .001 −1.4
Potassium (mmol/L) −0.23 −0.3, −0.2 <.001 −0.23 −0.2, −0.2 <.001 −0.10
Electrocardiographic Measurement
Absolute maximum of R
amplitude V5,6 (μV)		 −23.8 −37.3, −10.3 < .001 −7.9 −17.5, 1.7 .11 −8.8
Absolute S amplitude V1
(μV)		 −12.4 −24.8, 0.1 .05 −16.0 −25.3, −6.7 < .001 −31.6
R amplitude aVL (μV) 4.5 −2.0, 11.0 .17 3.4 −1.3, 8.1 .16 −9.0
Absolute S amplitude V3
(μV)		 0.6 −10.5, 11.6 .92 −4.8 −12.7, 3.0 .23 −22.9
QRS duration (ms) 0.9 0.6, 1.3 < .001 0.8 0.6, 1.1 < .001 0.2
Criteria for Electrocardiographic Left Ventricular Hypertrophy
Cornell voltage (μV) 4.4 −8.1, 16.9 .49 −0.9 −9.9, 8.1 .84 −32.1
Sokolow-Lyon (μV) −37.5 −56.6, −18.5 < .001 −26.3 −40.1, −12.4 < .001 −38.9
Cornell voltage product
(μV/ms)		 1.8 0.5, 3.0 .007 1.3 0.3, 2.2 .007 −2.3
Left ventricular mass (gm) −0.5 −1.0, −0.0 .04 −0.5 −0.8, −0.2 .004 −1.6
*

Change in systolic and diastolic blood pressure adjusted for baseline blood pressure level and for age, race, and baseline serum cholesterol, HDL, LDL, triglycerides, antihypertensive use, glucose, creatinine, potassium, proteinuria, uric acid, drinks per week, body mass index, and smoking status. Change in electrocardiographic level adjusted for baseline electrocardiographic level and for age, race, and baseline systolic blood pressure, diastolic blood pressure, serum cholesterol, HDL, LDL, triglycerides, antihypertensive use, glucose, creatinine, potassium, proteinuria, uric acid, drinks per week, body mass index, and smoking status.

†

Adjusted for baseline level only