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Table 2 Evaluation of difference of pre-therapy and post-therapy data in case and control groups

From: Effect of "no added salt diet" on blood pressure control and 24 hour urinary sodium excretion in mild to moderate hypertension

Difference of pre therapy & post therapy data

Case

Control

P value

Systolic BP (day)

12.1 ± 9.2

-4.9 ± 6.6

0.001

Systolic BP(night)

11.13 ± 9.8

-1.3 ± 3.9

0.001

Diastolic BP(day)

6.8 ± 7.3

-2.4 ± 3.3

0.01

Diastolic BP (night)

5.9 ± 4.8

-1.1 ± 3.7

0.01

Urinary Na excretion in 24 Hr urine (meq/dl)

42(-100 to 110)

-4(-69 to +23)

0.001

  1. Data are expressed as Mean ± SD, except of urinary sodium excretion which is expressed as median and range.