Phase 3 Trial of Cannabidiol (CBD; GWP42003-P) for Infantile Spasms: Open-label Extension Phase (GWPCARE7)

TEAEs were collected in members of the Safety Population, comprised of all participants who received at least 1 dose of GWP42003-P. TEAEs are defined as all adverse events not present prior to the first investigational medicinal product (IMP) or placebo administration or any event already present that worsened in severity or frequency following IMP.

Clinical relevance was determined by the investigator.

Clinical significance was determined by the investigator.

Clinical significance was determined by the investigator.

Clinical significance was determined by the investigator.

Clinical spasms were determined by video-electroencephalography (VEEG) for at least 8 hours and up to 24 hours.

Clinical spasms were determined by VEEG for at least 8 hours and up to 24 hours.

Resolution of hypsarrhythmia was determined by VEEG for at least 8 hours and up to 24 hours.

Resolution of hypsarrhythmia was determined by VEEG for at least 8 hours and up to 24 hours.

Caregivers recorded the participant's spasms and seizures by category in a daily diary. Subtypes of spasms and seizure included, clonic, tonic-clonic, myoclonic, focal, and absence.

The CGIC is a single-question assessment completed by the caregiver. The question assessed the status of the participant's condition since treatment start. The caregiver provided a rating on a 7-point scale: 1, very much improved; 2, much Improved; 3, slightly improved; 4, no change; 5, slightly worse; 6, much worse; 7, very much worse.

The PGIC is a single-question assessment completed by the investigator. The question assessed the status of the participant's condition since treatment start. The investigator provided a rating on a 7-point scale: 1, very much improved; 2, much Improved; 3, slightly improved; 4, no change; 5, slightly worse; 6, much worse; 7, very much worse.

A responder is defined as a participant experiencing a resolution of hypsarrhythmia and free of spasms. Test for responders was conducted by VEEG for at least 8 hours and up to 24 hours.

A responder is defined as a participant experiencing a resolution of hypsarrhythmia and free of spasms. Test for responders was conducted by VEEG for at least 8 hours and up to 24 hours.

A positive change indicates an increase in the average participant's height. A negative change indicates a decrease in the average participant's height. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

A positive change indicates an increase in the average participant's weight. A negative change indicates a decrease in the average participant's weight. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

A positive change indicates an increase in the average participant's head circumference. A negative change indicates a decrease in the average participant's head circumference. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

The Vineland-II scores were assessed by the participant's caregiver. Caregivers were asked to score questions in the following categories: the participant's communication, daily living, physical activity, problem behaviors, and social skills and relationships. Scoring was slightly different for each section, but generally ranged from "usually" (2) to "never" (0). The total score is calculated as the sum of standard scores from the domains and converted into the adaptive behavior composite score (ranging from 20 to 160). Higher scores represent greater levels of functioning, and lower scores represent lower levels of functioning. Change from Baseline was calculated as the post-Baseline value minus the Baseline value.

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.

Analysis could not be conducted for this outcome measure because the study met No Go Criteria. The Pilot Phase concluded after 9 participants completed treatment and demonstrated continued hypsarrhythmia and spasms on follow-up VEEG. The Pivotal Phase was not initiated; however, participants completing the Pilot Phase could roll into the Open Label Extension Phase for up to 1 year.