Table 1.

Means and standard deviations of demographic, cardiovascular, hematologic and respiratory variables at study onset for the group, and salt-sensitive and salt-insensitive subgroups.

	Group (n=36)	Na-Sensitive (n=13)	Na-Insensitive (n=23)	p
Age (yr)	52.6(8.4)	57.1(8.4)	50.0(7.3)	.012
Body weight (kg)	67.4(8.7)	71.5(8.7)	65.1(7.9)	.031
BMI (kg/m2)	25.3(3.3)	26.1(3.0)	24.9(3.5)	.269
Systolic BP (mmHg)	117.4(10.2)	121.6(10.4)	115.1(9.6)	.067
Mean BP (mmHg)	87.6(7.3)	90.5(7.2)	86.0(6.9)	.073
Diastolic BP (mmHg)	71.9(6.7)	74.5(6.3)	70.5(6.6)	.085
Heart rate (bpm)	71.7(8.7)	71.7(7.7)	71.7(9.4)	.999
Hemoglobin (gm/dl)	13.5(0.7)	13.5(0.8)	13.5(0.7)	.999
Breaths/min	14.2(2.6)	12.5(2.4)	15.3(2.1)	.000
Tidal volume (ml)	330(136)	353(129)	316(141)	.441
Min vent (L/min)	4.59(2.03)	4.14(1.38)	4.86(2.32)	.316