Table 1.

Descriptive data of case and control groups

	Case	Control	P Value
Age (year)	48.7 ± 11.1	46.05 ± 13.173	0.41
Weight (kilogram)	69.47 ± 10.39	70.85 ± 10.15	0.62
Systolic BP (day)	147.1 ± 12.7	141.2 ± 10.2	0.06
Systolic BP(night)	136.7 ± 9.2	133.3 ± 10.9	0.173
Urinary Na excretion in 24 hour urine (meq/dl)	132(35–200)	216(210–274)	0.42
Urinary Na per creatinine excretion in 24 hours urine (meq/mg/dl)	1.44 ± 0.63	1.52 ± 0.68	0.46
Hyperlipidemia*	31 (52%)	7 (35%)	0.175
Family history**	11 (18%)	7 (35%)	0.07
Smoking***	3 (5%)	5 (25%)	0.011
Male sex	30 (50%)	10 (50%)	1.0

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

*Defined as history of triglyceride more than200 mg/dl and total cholesterol more than 200 mg/dl.

**History of hypertension (BP more than 140/90) in fist degree relatives.

*** Smoking recent smoking of even a cigarette per day