表 5. Parameters of ROC curves of post-CCT indexes in differential diagnosis of PA and NREH.

CCT后各指标对PA与NREH鉴别诊断的价值

Index	AUC	95%CI	Optimal cut-off value	Sensitivity/%	Specificity/%	Positive likelihood ratio	Negative likelihood ratio
PA: Primary aldosteronism; NREH: Normal renin primary hypertension; ARR: Aldosterone renin activity ratio; PAC: Plasma aldosterone concentration; PRA: Plasma renin activity; CCT: Captopril challenge test; AUC: Area under curve; CI: Confidence interval. a P<0.05, vs. post-CCT ARR; bP<0.05, vs. post-CCT PAC.
Post-CCT ARR/((ng·dL−1)/(ng·mL−1·h−1))	0.964	0.921-0.987	22.96	89.17	91.89	11.00	0.12
Post-CCT PAC/(ng·dL−1)	0.868a	0.806-0.916	19.24	78.40	86.84	5.96	0.25
Post-CCT PAC suppression rate/%	0.633a, b	0.554-0.707	33.36	95.20	31.58	1.39	0.15
Post-CCT PRA/(ng·mL−1·h−1)	0.907a	0.850-0.947	0.61	76.67	91.89	9.46	0.25