Serum Sodium Values in Essential Hypertension.

Abstract
The Beckman flame photometer was used to determine serum Na values in 75 hypertensive subjects and 400 normotensive subjects. The mean value for the normotensive serum Na was found to be 144.8 mEq./l. The mean value found in the 75 hypertensive subjects was 147.3 mEq./l., an increase of 2.5 mEq./l. Statistical analysis of the data using Fisher''s "t" test showed the difference between the means to be significant. Standard deviation in 400 normal detns. was 3.81 mEq./l. and the standard error 0.19 mEq./l. In the hypertensive series the standard deviation was 4.07 mEq./l. and the standard error 0.45 mEq./l.

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