表 1. Comparison of clinical characteristics between PA group and EH group.

EH组与PA组临床资料比较

Variable	EH group (n=59)	PA group (n=125)	P
PA: Primary aldosteronism; EH: Essential hypertension; BMI: Body mass index; CVD: Cardiovascular disease; DBP: Diastolic blood pressure; SBP: Systolic blood pressure; ARR: Aldosterone renin activity ratio; SIT: Saline infusion test; PAC: Plasma aldosterone concentration. *Median (P25, P75). 1 mmHg=0.133 kPa.
Age/yr.	48.7±12.1	48.1±12.1	0.739
(Male/female)/case	25/34	52/73	0.338
BMI/(kg/m2)	25.2±3.7	24.3±3.4	0.133
SBP/mmHg	144±17	153±22	0.026
DBP/mmHg	89±11	94±14	0.028
Serum Na+/(mmol·L−1)	140.0±18.7	143.0±19.4	0.272
Serum K+/(mmol·L−1)	3.70±0.36	3.35±0.45	<0.001
Duration of hypertension*/year	2.5 (0.3, 7.1)	5.0 (2.0, 10.0)	0.002
Diabetes mellitus or prediabetes/case (%)	22 (37.3)	32 (25.6)	0.218
CVD/case (%)	26 (44.5)	45 (35.8)	0.258
Upright ARR*/((ng·dL−1)/(ng·mL−1·h−1))	12.8 (7.2, 34.5)	94.8 (48.4, 227.0)	<0.001
Post-SIT PAC*/(ng·dL−1)	10.0 (8.3, 10.9)	22.2 (16.1, 30.5)	<0.001