Department of Community Medicine, Institute of Medical Sciences, BHU, Varanasi" and of Atul Budukh as "Homi Bhabha National Institute, Tata Memorial Centre, Mumbai, India.
Community Medicine and SPH, PGIMER, Chandigarh, India.
Asian Pac J Cancer Prev. 2021 May 1;22(5):1421-1433. doi: 10.31557/APJCP.2021.22.5.1421.
Population based Cancer Registries(PBCRs) are hallmark of cancer surveillance and cancer control activity .The value of cancer registries rely heavily on underlying quality of their data. Current study assessed data quality of four new PBCRs of Chandigarh, SAS Nagar, Mansa and Sangrur covering a total population of 4.5 millions on three quality parameters i.e. comparability, validity and completeness as recommended by International Agency of Research on Cancer(IARC), Lyon, France.
For assessing comparability, data of the registries were reviewed in terms of system of classification and coding, definition of incidence date and rule for multiple primaries. For assessing validity (Accuracy) four different methods i.e. re-abstraction and re-coding, percentage morphologically verified cases (MV%), percentage of death certificate only (DCO%) cases and percentage of cases with other and unspecified sites (O and U%) were used. For assessing completeness of coverage, different semi-quantitative methods were used.
Re-abstraction done for 10% of the total incident cases yielded overall percentage agreement of 97.4%, 97.2%, 95.4% and 94.9% for PBCR Chandigarh, SAS Nagar, Mansa and Sangrur respectively. MV% was found to be 96.3% for PBCR Chandigarh, 92.8% for PBCR SAS Nagar , 89.3% for PBCR Mansa and 82.9% for PBCR Sangrur. Percentage of DCO cases and O and U cases were 1.4% and 2.8% for PBCR Chandigarh, 3.9% and 5.3% for SAS Nagar, 6.4% and 16.4% for Mansa and 6.3% and 8.3% for Sangrur. Completeness assessed through the various methods showed good level of completeness at PBCR Chandigarh and SAS Nagar and somewhat lower but acceptable level of completeness at PBCR Mansa and Sangrur.
All the four PBCRs are comparable internationally. PBCR Chandigarh and SAS Nagar, predominantly urban registries, have higher accuracy of their data and good completeness levels as compared to predominantly rural registries of Mansa and Sangrur. Cancer estimates given by all the four registries are reliable and data from these registries can be utilized for planning cancer prevention and control activities in the region.
人群癌症登记处（PBCR）是癌症监测和癌症控制活动的标志。癌症登记处的数据质量主要依赖于其数据的基础质量。本研究根据国际癌症研究机构（IARC）、法国里昂的建议，评估了覆盖 450 万人口的昌迪加尔、SAS Nagar、曼萨和桑古尔四个新 PBCR 的三个质量参数，即可比性、有效性和完整性。
为了评估可比性，根据分类和编码系统、发病日期的定义以及多原发肿瘤的规则，对登记处的数据进行了审查。为了评估有效性（准确性），使用了四种不同的方法，即重新摘录和重新编码、形态学验证病例的百分比（MV%）、仅死亡证明病例的百分比（DCO%）和其他和未指定部位（O 和 U%）的病例百分比。为了评估覆盖范围的完整性，使用了不同的半定量方法。
对总发病病例的 10%进行了重新摘录，昌迪加尔、SAS Nagar、曼萨和桑古尔的 PBCR 分别得到了 97.4%、97.2%、95.4%和 94.9%的总体一致性。昌迪加尔的 MV%为 96.3%，SAS Nagar 的 MV%为 92.8%，曼萨的 MV%为 89.3%，桑古尔的 MV%为 82.9%。DCO 病例和 O 和 U 病例的百分比分别为 1.4%和 2.8%，SAS Nagar 的百分比为 3.9%和 5.3%，Mansa 的百分比为 6.4%和 16.4%，Sangrur 的百分比为 6.3%和 8.3%。通过各种方法评估的完整性表明，昌迪加尔和 SAS Nagar 的 PBCR 具有较高的完整性水平，而曼萨和桑古尔的 PBCR 则略低，但仍可接受。
这四个 PBCR 在国际上是可比的。昌迪加尔和 SAS Nagar 的 PBCR 主要是城市登记处，其数据的准确性较高，完整性水平较好，而主要是农村登记处的 Mansa 和 Sangrur 的准确性和完整性水平较低。所有四个登记处提供的癌症估计都是可靠的，这些登记处的数据可用于该地区的癌症预防和控制活动规划。
