A Study to Evaluate the Efficacy and Safety of LCI699 Compared to Placebo in Participants With Resistant Hypertension

Arterial blood pressure (BP) determinations were made after the participant was in the sitting position for 5 minutes according to the American Heart Association guidelines using a calibrated standard aneroid or mercury sphygmomanometer or a calibrated standard sphygmomanometer. The change in the MSSBP was calculated comparing the Week 8 readings to the readings taken at Baseline. The change from Baseline in MSSBP was analyzed using an analysis of covariance model (ANCOVA) with treatment and country as factors and Baseline MSSBP as a covariate.

Arterial BP determinations were made after the participant was in the sitting position for 5 minutes according to the American Heart Association guidelines using a calibrated standard aneroid or mercury sphygmomanometer or a calibrated standard sphygmomanometer. The change in the MSDBP was calculated comparing the Week 8 readings to the readings taken at Baseline. The change from Baseline in MSDBP was analyzed using an ANCOVA with treatment and country as factors and Baseline MSDBP as a covariate.

MSSBP response was defined as the percentage of participants with a MSSBP <140 mmHg or a >=20 mmHg reduction from baseline reduction from baseline. MSSBP control was defined as the percentage of participants with a MSSBP <140 mmHg for non-diabetic participants and <130mHg for diabetic participants.

MSDBP response was defined as the percentage of participants with a MSDBP <90 mmHg or a >=10 mmHg reduction from baseline. MSDBP control was defined as the percentage of participants with a MSDBP <90 mmHg for non-diabetic participants and <80mHg for diabetic participants.

Arterial BP determinations were made after the participant was in the sitting position for 5 minutes according to the American Heart Association guidelines using a calibrated standard aneroid or mercury sphygmomanometer or a calibrated standard sphygmomanometer. The change in the MSSBP was calculated comparing the Week 8 readings to the readings taken at Baseline. The change from Baseline in MSSBP was analyzed using an ANCOVA with treatment and country as factors and Baseline MSSBP as a covariate.

Arterial BP determinations were made after the participant was in the sitting position for 5 minutes according to the American Heart Association guidelines using a calibrated standard aneroid or mercury sphygmomanometer or a calibrated standard sphygmomanometer. The change in the MSDBP was calculated comparing the Week 8 readings to the readings taken at Baseline. The change from Baseline in MSDBP was analyzed using an ANCOVA with treatment and country as factors and Baseline MSDBP as a covariate.

An ABPM measured a participant's blood pressure over a 24-hour period including daytime and nighttime readings, using an automated validated monitoring device from Baseline to Week 8. The 24-hour SBP was calculated by taking the mean of all ambulatory systolic blood pressure readings for the 24-hour period. The change from Baseline in SBP was analyzed using ANCOVA with treatment and country as factors and Baseline MSSBP as a covariate.

An ABPM measured a participant's blood pressure over a 24-hour period including daytime and nighttime readings, using an automated validated monitoring device from Baseline to Week 8. The 24-hour DBP was calculated by taking the mean of all ambulatory diastolic blood pressure readings for the 24-hour period. The change from Baseline in DBP was analyzed using an ANCOVA with treatment and country as factors and Baseline MSDBP as a covariate.

An ABPM measured a participant's blood pressure over a 24-hour period including daytime and nighttime readings using an automated validated monitoring device from Baseline to Week 4. The 24-hour SBP was calculated by taking the mean of all ambulatory systolic blood pressure readings for the 24-hour period. The change from Baseline in SBP was analyzed using an ANCOVA with treatment and country as factors and Baseline MSDBP as a covariate.

An ABPM measured a participant's blood pressure over a 24-hour period including daytime and nighttime readings using an automated validated monitoring device from Baseline to Week 4. The 24-hour DBP was calculated by taking the mean of all ambulatory diastolic blood pressure readings for the 24-hour period. The change from Baseline in DBP was analyzed using an ANCOVA with treatment and country as factors and Baseline MSDBP as a covariate.

An AE was an adverse medical event which occurs in a participant of the study and which is not necessarily in a causal relationship with the treatment the participant receives. SAEs were AEs leading to death, are life-threatening, require hospitalizations or prolongation of hospitalizations, represent an innate malformation or a congenital abnormality. Hyperkalemia was defined as potassium level >5.5 millimoles per liter (mmol/L). It is the medical term that describes a potassium level that's higher than normal. Hyponatremia was defined as sodium level <135 mmol/L. It is the medical term that describes a sodium level that's lesser than normal.

Serum cortisol concentrations at 1 hour after injection were measured to assess the maximum stimulated cortisol level achieved. Potential adrenal suppression was indicated if the serum cortisol concentration was <500 nanomoles per liter (nmol/L) at 1 hour after the injection.

Percent change from Baseline was analyzed by ANCOVA model using PA values measured at Baseline and Week 8 LOCF, with treatment and country as factors and Baseline value as the covariate. Negative percent change from Baseline shows improvement.

Percent change from Baseline was analyzed by ANCOVA model using plasma renin values measured at Baseline and Week 8 LOCF, with treatment and country as factors and Baseline value as the covariate. Negative percent change from Baseline shows improvement.

Percent change from Baseline was analyzed by ANCOVA model using active renin values measured at Baseline and Week 8 LOCF, with treatment and country as factors and Baseline value as the covariate. Negative percent change from Baseline shows improvement.

Percent change from Baseline was analyzed by ANCOVA model using percent ratio of PA to PRA values measured at Baseline and Week 8 LOCF, with treatment and country as factors and Baseline value as the covariate. Negative percent change from Baseline shows improvement.