Figure 1.

Correlation between apnea-hypopnea index (AHI), plasma-aldosterone concentration (PAC), and 24-h urinary aldosterone excretion (UAldo) in high (H-Aldo) and normal (N-Aldo) aldosterone subjects

PAC and UAldo were positively and significantly correlated with AHI in the H-Aldo group (Spearman's ρ = 0.568, p = 0.0009; Spearman's ρ = 0.533, p = 0.0020, respectively). To a lesser degree, UAldo was correlated with AHI in the N-Aldo subjects (Spearman's ρ = 0.224, p = 0.0490). PAC was not significantly correlated with AHI in the N-Aldo group (Spearman's ρ = 0.015, p = 0.8980).