Table 2. Mean and standard deviation of average of 24-hour ambulatory systolic and diastolic blood pressures before and after treatment.

Characteristics	Placebo group (n = 20)		Spironolactone group (n = 20)		Treatment difference	p-value
	Baseline	1 months	Baseline	1 months
Blood pressure indices
Systolic blood pressure (mmHg)	143.70 ± 9.31	141.05 ± 9.64	143.55 ± 8.23	137.10 ± 7.57	-4.5	< 0.001
Diastolic blood pressure (mmHg)	85.55 ± 7.44	83.60 ± 5.74	89.50 ± 4.69	87.15 ± 4.69	-1.3	0.099
Subgroups based on potassium level
SBP in patients with K ≥ 4.2	146.87 ± 7.98	144.25 ± 8.27	142.91 ± 8.25	137.16 ± 7.45	-4.95	< 0.001
SBP in patients with K < 4.2	141.55 ± 9.85	138.91 ± 10.2	144.55 ± 8.66	137.00 ± 8.26	-3.7	0.016
DBP in patients with K ≥ 4.2	89.50 ± 6.78	85.37 ± 6.34	89.83 ± 4.91	86.33 ± 4.49	-2.37	0.014
DBP in patients with K < 4.2	82.91 ± 6.89	82.41 ± 5.24	89.00 ± 6.69	88.37 ± 5.01	0.87	0.295
SBP in patients with K ≥ 4.0	146.50 ± 6.77	143.75 ± 6.86	144.23 ± 9.21	137.05 ± 7.85	-5.14	< 0.001
SBP in patients with K < 4.0	139.50 ± 11.3	137.00 ± 12.1	142.28 ± 6.47	135.28 ± 7.22	-3.28	0.078
DBP in patients with K ≥ 4.0	87.66 ± 6.38	85.08 ± 5.43	90.46 ± 5.22	86.84 ± 4.68	-2.96	0.001
DBP in patients with K < 4.0	82.37 ± 8.19	81.37 ± 5.80	87.71 ± 6.07	87.71 ± 5.02	1.78	0.058

DBP, diastolic blood pressure; SBP, systolic blood pressure.