A Phase 3, Open-label, Multicenter, 12-Month Safety and Tolerability Study of SHP465 in Children Aged 4 to 12 Years Diagnosed With Attention-deficit/Hyperactivity Disorder

Number of Participants With Treatment-Emergent Adverse Events (TEAEs)

Time Frame: From start of study drug administration up to follow-up (approximately up to 367 days)

An adverse event (AE) was any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product and that does not necessarily have a causal relationship with this treatment. TEAEs was defined as AEs that start or deteriorate on or after the date of the first dose of investigational product and no later than 3 days following the last dose of investigational product.

Change From Baseline in Pulse Rate at Final On-Treatment Assessment (FoTA)

Time Frame: Baseline, FoTA (up to 330 days)

Change from baseline in pulse rate at FoTA was reported. FoTA was defined as the last valid assessment obtained after baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product in the current study.

Change From Baseline in Blood Pressure at Final On-Treatment Assessment (FoTA)

Time Frame: Baseline, FoTA (up to 330 days)

Change from baseline in systolic blood pressure (SBP) and diastolic blood pressure (DBP) at FoTA was reported. FoTA was defined as the last valid assessment obtained after baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product in the current study.

Change From Baseline in Height at Final On-Treatment Assessment (FoTA)

Time Frame: Baseline, FoTA (up to 330 days)

Height was measured in centimeters (cm) without shoes and with light clothing using a stadiometer. FoTA was defined as the last valid assessment obtained after baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product in the current study.

Change From Baseline in Weight at Final On-Treatment Assessment (FoTA)

Time Frame: Baseline, FoTA (up to 330 days)

Weight was measured in kilograms (kg) without shoes and with light clothing using a calibrated scale. FoTA was defined as the last valid assessment obtained after baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product in the current study.

Change From Baseline in Hematology Parameters at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter basophils, eosinophils, leukocytes, lymphocytes, monocytes, neutrophils band form, segmented neutrophils, neutrophils/total cells and platelets were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Leukocytes at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology leukocytes parameter: basophils, eosinophils, lymphocytes, monocytes and neutrophil were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Erythrocytes at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter erythrocytes were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Erythrocytes Mean Corpuscular Hemoglobin Concentration at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter erythrocytes mean corpuscular hemoglobin concentration were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Erythrocytes Mean Corpuscular Hemoglobin at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter erythrocytes mean corpuscular hemoglobin were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Chemistry Parameters (Albumin and Protein) at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in chemistry parameters albumin and protein were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Chemistry Parameters (Blood Urea Nitrogen, Cholesterol, Glucose, Phosphate, Potassium, Sodium and Urate) at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in chemistry parameters blood urea nitrogen, cholesterol, glucose, phosphate, potassium, sodium and urate were studies. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Chemistry Parameters (Bilirubin and Creatinine) at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in chemistry parameters bilirubin and creatinine were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Thyrotropin at Early Termination/ Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in thyrotropin were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Thyroxine,Free at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in thyroxine,free were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Urinalysis (Specific Gravity) at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in urine specific gravity were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Hematocrit at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter hematocrit were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Hemoglobin at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter hemoglobin were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Hematology Parameters (Erythrocytes Mean Corpuscular Volume and Mean Platelet Volume) at Early Termination/ Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in hematology parameter erythrocytes mean corpuscular volume and mean platelet volume were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Chemistry Parameters at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in chemistry parameter alanine aminotransferase, alkaline phosphatase, aspartate aminotransferase, gamma glutamyl transferase, and lactate dehydrogenase were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Urobilinogen at Early Termination/Day 360

Time Frame: Baseline, Early termination/Day 360

Change from baseline in urobilinogen were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Urine Potential of Hydrogen (pH) at Early Termination/Day 360

Time Frame: Baseline, Early Termination/Day 360

Change from baseline in urine pH were reported. Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Change From Baseline in Heart Rate at Final On-Treatment Assessment (FoTA)

Time Frame: Baseline, FoTA (up to 330 days)

Heart rate was measured by Electrocardiogram (ECG). ECG was performed using the central ECG provider's equipment and was send to the central ECG provider electronically. Change from baseline in heart rate at FoTA were reported. FoTA was defined as the last valid assessment obtained after baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the average of all valid ECG measurements as the last assessment obtained before the first dose of investigational product.

Change From Baseline in Electrocardiogram Parameters at Final On-Treatment Assessment (FoTA)

Time Frame: Baseline, FoTA (up to 330 days)

ECG was performed using the central ECG provider's equipment and was sent to the central ECG provider electronically to measure PR, RR, QRS , QT, QTcB and QTcF intervals. FoTA was defined as the last valid assessment obtained after Baseline and whilst on investigational product (on or before 2 days after the last dose date).Group A baseline was the baseline of the antecedent studies. Group B baseline was the average of all valid ECG measurements as the last assessment obtained before the first dose of investigational product.

Number of Participants With Quality of Sleep Assessed by Post Sleep Questionnaire (PSQ) at Final On-Treatment Assessment (FoTA)

Time Frame: FoTA (up to 330 days)

PSQ was a 7-item questionnaire typically used to assess sleep quality with pharmacologic treatment. The questionnaire collects data on average time to sleep, sleep latency, frequency of interrupted sleep, duration of interrupted sleep, total sleep time and sleep quality over the last week. The assessment was done by the nature of the responses, not by a numbered scale. Participants analyzed for number of times woke up per night category were only the participants who responded as yes for the woke up during the night category in this outcome measure. FoTA was defined as the last valid assessment obtained after Baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product.

Length of Time Awake Per Night and Length of Time to Fall Asleep Per Night Assessed by Post Sleep Questionnaire (PSQ) at Final On-Treatment Assessment (FoTA)

Time Frame: FoTA (up to 330 days)

PSQ was a 7-item questionnaire typically used to assess sleep quality with pharmacologic treatment. The questionnaire collects data on average time to sleep, sleep latency, frequency of interrupted sleep, duration of interrupted sleep, total sleep time and sleep quality over the last week. FoTA was defined as the last valid assessment obtained after Baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product. Length of time awake per night and length of time to fall asleep per night was assessed at FoTA.

Length of Time Sleeping Per Night Assessed by Post Sleep Questionnaire (PSQ) at Final On-Treatment Assessment (FoTA)

Time Frame: FoTA (up to 330 days)

PSQ was a 7-item questionnaire typically used to assess sleep quality with pharmacologic treatment. The questionnaire collects data on average time to sleep, sleep latency, frequency of interrupted sleep, duration of interrupted sleep, total sleep time and sleep quality over the last week. FoTA was defined as the last valid assessment obtained after Baseline and whilst on investigational product (on or before 2 days after the last dose date). Group A baseline was the baseline of the antecedent studies. Group B baseline was the last value collected before the first dose of investigational product. Length of time sleeping per night was assessed at FoTA.

Total Sleep Disturbance Score of Children's Sleep Habits Questionnaire (CSHQ ) at Final On-Treatment Assessment (FoTA)

Time Frame: FoTA (up to 330 days)

CSHQ was a tool designed to screen for the most common sleep problems in children and consisted of 33 items for scoring and several extra items intended to provide administrators with other potentially useful information about respondents. The instrument evaluates the 8 different subscales: bedtime resistance, sleep onset delay, sleep duration, sleep anxiety, night wakings, parasomnias, sleep disordered breathing, and daytime sleepiness. A 3-point scale was used for rating: "usually" if the sleep behavior occurs 5 to 7 times per week, "sometimes" for 2 to 4 times per week, and "rarely" for once or not at all during the week. The TSD score, which is the sum of all responses, included all items of the 8 subscales, but consisted of only 33 items because two on the bedtime resistance and sleep anxiety subscales were identical (range: 0, 99). A negative value indicates less sleep disturbance.

Number of Participants With a Positive Response in Columbia-Suicide Severity Rating Scale (C-SSRS) at Day 330

Time Frame: Day 330

C-SSRS is a semi-structured interview that captures the occurrence, severity, and frequency of suicide-related thoughts and behaviors during the assessment period. The number of participants with postive response in suicidal ideation and suicidal behavior were reported.