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监测中心分别对上报中和上报后的报告卡进行质量控制，主要包括：唯一性校验、完整性校验、一致性校验和逻辑性校验。
保证报告卡具有唯一识别编号。根据报告卡的组织机构代码、病案号以及出院时间三项信息，建立报告卡的唯一识别编号。如果三项信息完全相等，由监测点及监测中心专业人员进行识别，决定对其剔除或合并，从而对报告卡进行唯一性校验。
保证报告卡的关键信息完整无缺失。报告卡设置有必填项变量（如性别、主诊断编码及名称等）、条件必填项变量（如病理诊断编码及名称、死亡原因及编码等）以及其他变量。如报告卡在上报中缺失必填项变量，监测平台即时提醒录入员补充完整后再次上报。
保证报告卡的关键信息准确、可靠。例如，首先采用身份证号码编码规则及校验位校验算法对身份证号码进行校验，其次对身份证号码与出生日期、性别及疾病诊断的一致性进行校验，对未通过校验的身份证号码进行核查或剔除。如根据出生日期与入院时间计算患儿年龄，对不满足0~19周岁的报告卡进行核查或剔除。再如对患儿户口地所在省份进行有效性校验，无法识别患儿户口地所在省份的报告卡退回至监测点，由录入员核查修改后再次上报。
保证报告卡信息的前后一致性和真实性。例如，按照《疾病分类代码国家临床版2.0》，对疾病诊断名称和编码的一致性进行校验。如对性别与疾病诊断进行校验，包括男病女患校验和女病男患校验。再如对住院费用信息进行一致性校验，主要包括医疗付费方式与自付费用的一致性校验、总费用与分项费用之和关系的校验等。此外，时间逻辑校验主要包括入院时间与出生日期、入院时间与出院时间以及出院时间与手术操作日期等。对未通过逻辑校验规则的报告卡退回至监测点，由录入员核查修改后再次上报。
The employment of registrars and reviewers in pediatric cancer surveillance sites should meet the professional requirements in The Notice on Better Treatment and Management of Major Pediatric Diseases (Medical Letter No. 22 of the NHC [2020]), that“Medical record management departments are responsible for information registration and import and data quality management”. Two professionals will work together to complete the registration and reporting. After the report cards are filled or imported, the registrar shall submit them to the reviewer after passing the verification of the surveillance platform, who will then report them to the surveillance center after they pass the review. In addition, the surveillance sites that have realized the automatic reporting of case information through the docking of the information port shall be equipped with professional developers to jointly complete the spot check, review and reporting of the report cards with registrars and reviewers.
The NCPCS provides professional and operational training on case registration and reporting to relevant personnel at the surveillance sites. It mainly includes in-platform application and operation training for registrars and reviewers, such as template sorting of document import, version compatibility debugging, review and reporting, and other user-end operations. Technical support will be provided for developers and engineers responsible for port docking at surveillance sites, including on port docking process, key technicalities, matters needing attention in development, and problems likely to arise during development.
The NCPCS has established reporting rules and standards for the contents and variables to be registered in report cards. They mainly include filling rules of compulsory items and conditional compulsory items, filling criteria of key variables, etc. For example, disease diagnosis name and code are based on International Classification of Diseases National Clinical Edition 2.0 (ICD-10). Pathological diagnosis code and name are based on the cancer morphology code (M code) of the International Classification of Diseases National Clinical Edition 2.0 . Operation code and name are in accordance with the International Classification of Diseases , Ninth Revision , Clinical Modification , National Clinical Edition 2.0 (ICD-9-CM3).
The NCPCS carries out quality control of report cards during and after reporting, which mainly includes verification of their uniqueness, integrity, validity, and logic.
Every report card must have a unique identification number, composed of the organization code, medical record number, and discharge time. If the three items of information are identical, staff at the surveillance sites and the NCPCS will identify them and decide whether to delete or merge them, thereby verifying the uniqueness of the report cards.
Key information of the report cards must be complete. The report cards are set with compulsory variables (such as gender, main diagnosis code and name), conditional compulsory variables (such as pathological diagnosis code and name, cause of death and code, etc.), and other variables. If any compulsory variable is left unfilled on the report cards, the surveillance platform will immediately remind registrars to refill and then report again.
Key information of case report cards must be accurate and reliable. For example, the ID number will be verified by ID number encoding rules and the parity bit checking algorithm. Secondly, the consistency between the ID number, date of birth, gender, and disease diagnosis will be verified. ID numbers that fail to pass verification will be reexamined or eliminated. For example, the age of children will be calculated according to their date of birth and admission time. Those who are not aged between 0 and 19 will be reexamined or eliminated. Validity verification is also performed on children’s provincial-level regions of residence. Those whose provincial-level regions are not identifiable will be returned to the surveillance sites, and submitted again after verification and modification by registrars.
Information on report cards must be consistent and authentic. For example, consistency of disease diagnosis name and code will be verified according to the International Classification of Diseases National Clinical Edition 2.0 . Consistency between gender and disease, i. e. whether a male disease has been diagnosed for a female, or vice versa, will also be verified. Consistency verification of hospitalization expenses information mainly includes the consistency between medical payment methods and out-of-pocket expenses, and expenses of each item. Besides, chronological consistency will also be verified, including between admission time and date of birth, between admission and discharge time, and discharge time and date of operation. If report cards fail to pass verification, they shall be returned to the surveillance sites and submitted again after verification and modification by registrars.