Table 2.

Rates of unilateral PA patients without apparent adrenal tumors in each parameter classified by quartile.

Parameter		Rates of Unilateral PA (%)	P
Age, years	<43	10.9	0.022*
	44-51	9.6
	52-60	15.2
	≥61	14.7
HT duration, years	<1	5.5	<0.001*
	1-3	7.0
	4-9	12.3
	≥10	23.7
Creatinine, mg/dL	<0.6	8.1	<0.001*
	0.6-0.70	8.2
	0.71-0.83	12.3
	≥0.84	21.6
Serum K+, mEq/l	<3.6	34.2	<0.001*
	3.6-3.8	10.7
	3.9-4.0	7.4
	≥4.1	5.1
ARR, pg/ml per ng/ml/h	<298	6.0	<0.001*
	298-442	7.1
	443-742	11.2
	≥743	26.2
PAC, pg/ml	<123	2.6	<0.001*
	123-161	9.5
	162-225	12.6
	≥226	25.4

Cuzick’s nonparametric test was performed to assess trends across ordered groups. Asterisks (*) indicate significant differences (P <0.05). ARR, aldosterone-to-renin ratio; HT, hypertension; PA, primary aldosteronism; and PAC, Plasma aldosterone concentration.