Aliskiren dispensing capsules containing minitablets (3.125 mg per minitablet). For the medium dose arm, participants used one or more of the 37.5 mg capsule (containing 12 minitablets) once daily to reach the body- weight stratified dose of aliskiren.

Aliskiren dispensing capsules containing minitablets (3.125 mg per minitablet). For the high dose arm, participants used one or more of the 150 mg capsule (containing 48 minitablets) once daily to reach the body- weight stratified dose of aliskiren.

AEs were defined as any unfavorable and unintended diagnosis, symptom, sign (including an abnormal laboratory finding), syndrome or disease which either occurs during study, having been absent at baseline, or, if present at baseline, appears to worsen. SAEs were defined as any untoward medical occurrences that result in death, are life threatening, require (or prolong) hospitalization, cause persistent or significant disability/incapacity, result in congenital anomalies or birth defects, or are other conditions which in judgement of investigators represent significant hazards.

Sitting blood pressure was measured using a calibrated standard sphygmomanometer after the participants remained in sitting position for 5 minutes at clinic during the visit. The repeat sitting measurements were made at 1-2 minute intervals and the mean of three sDBP measurements were used as the average sitting office blood pressure for that visit.

Sitting blood pressure was measured using a calibrated standard sphygmomanometer after the participants remained in sitting position for 5 minutes at clinic during the visit. The repeat sitting measurements were made at 1-2 minute intervals and the mean of three sDBP measurements were used as the average sitting office blood pressure for that visit.

MAP was defined as the average arterial pressure during a single cardiac cycle. The MAP was measured as sum of diastolic blood pressure (DBP) and one third of difference between systolic blood pressure (SBP) and DBP i.e. MAP = DBP+1/3*(SBP-DBP).

MAP was defined as the average arterial pressure during a single cardiac cycle. The MAP was measured as sum of DBP and one third of difference between SBP and DBP i.e. MAP = DBP+1/3*(SBP-DBP).

Treatment responders were defined as participants with msSBP less than 95th percentile (for age, gender and height) or a 7 mmHg decrease in msSBP from the baseline.

Ambulatory Blood Pressure Monitoring (ABPM) was performed over a 24-hour period using an automatic ABPM device to record the blood pressure as per study defined criteria. The participants who were selected for this evaluation wore the ABPM device for 24 hours, returned to the clinic upon completion of the 24-hour monitoring period for removal of device and BP assessments. The ABPM device was pre-set to collect readings every 20 minutes. Mean hourly systolic and diastolic blood pressure were calculated for each participant at post dosing 1 - 24 hours.

ABPM was performed over a 24-hour period using an automatic ABPM device to record the blood pressure as per study defined criteria. Day time was defined as the average of the hourly means between 6 am and 10 pm while the night time mean was the average of the hourly means between 10 pm and 6 am.

ABPM was performed over a 24-hour period using an automatic ABPM device to record the blood pressure as per study defined criteria. Dippers were defined as those participants in whom there was a decrease in mean night time (6pm - 6am) ABPM more than or equal to (≥ ) 10% as compared to average daytime (6am -6pm) ABPM.

ABPM was performed over a 24-hour period using an automatic ABPM device to record the blood pressure as per study defined criteria. Non-dippers were defined as those participants in whom there was a decrease in mean night time ABPM less than 10% as compared to average daytime ABPM.

During Phase 1: Participants received body-weight stratified dose of aliskiren capsules (37.5/75/150 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 37.5 mg; ≥50 kg and < 80 kg received 75 mg and ≥ 80 kg and ≤ 150 kg received 150 mg of aliskiren.

During Phase 2: 30 participants continued the aliskiren treatment from Phase 1, while 21 participants switched to placebo treatment.

During Phase 1: Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

During Phase 2: 50 participants continued the aliskiren treatment from Phase 1, while 52 participants switched to placebo treatment.

Participants received placebo capsules matching to aliskiren capsules (37.5/75/150 mg) once daily.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received placebo capsules matching to aliskiren capsules (150/300/600 mg) once daily.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received placebo capsules matching to aliskiren capsules (37.5/75/150 mg) once daily.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received placebo capsules matching to aliskiren capsules (150/300/600 mg) once daily.

Participants received placebo capsules matching to aliskiren capsules (37.5/75/150 mg) once daily.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received placebo capsules matching to aliskiren capsules (150/300/600 mg) once daily.

Participants received placebo capsules matching to aliskiren capsules (37.5/75/150 mg) once daily.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received placebo capsules matching to aliskiren capsules (150/300/600 mg) once daily.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.

Participants received body-weight stratified dose of aliskiren capsules (150/300/600 mg) once daily. Participants whose body weight ≥ 20 kg to < 50 kg received 150 mg; ≥50 kg and < 80 kg received 300 mg and ≥ 80 kg and ≤ 150 kg received 600 mg of aliskiren.