The main purpose is to describe how many children were treated during 24 months or less because of CPP and how treatment worked for them.

There are no participants in this trial, the study only involves reviewing participants medical past and current records and collecting information.

This is an observational, non-interventional, retrospective study to evaluate the participants characteristics, current treatment patterns and resource usage in Chinese pediatric participants diagnosed with CPP.

This study will enroll approximately 1000 participants.

The data available in an existing data source the Chinese CPP Big Data Platform database will be analyzed. All the participants will be assigned to a single observational cohort:

• Pediatric Participants With CPP

This multi-center trial will be conducted in China. The overall duration of the study will be approximately 3 years.

Inclusion Criteria:

• Participants diagnosed with CPP and treated with GnRHa from the centers participating in this study within the Chinese CPP Big Data Platform database since 2015 to 2024.

CPP diagnosis is based on the clinical assessment and description by CPP specialized doctors.

Exclusion Criteria:

• Not received GnRHa as the treatment for CPP.
• No available data for analysis.

Pediatric participants with a diagnosis of CPP who are currently or previously undergoing GnRHa treatment between 2015 and 31 December 2024 will be enrolled in this study.

Takeda provides access to the de-identified individual participant data (IPD) for eligible studies to aid qualified researchers in addressing legitimate scientific objectives (Takeda's data sharing commitment is available on https://clinicaltrials.takeda.com/takedas-commitment?commitment=5). These IPDs will be provided in a secure research environment following approval of a data sharing request, and under the terms of a data sharing agreement.

IPD from eligible studies will be shared with qualified researchers according to the criteria and process described on https://vivli.org/ourmember/takeda/ For approved requests, the researchers will be provided access to anonymized data (to respect patient privacy in line with applicable laws and regulations) and with information necessary to address the research objectives under the terms of a data sharing agreement.