Quality assessment of a rural population-based cancer registry (PBCR) at Ratnagiri, Maharashtra, India for the years 2017–18

Samyukta Shivshankar1,2,a, Monika Sarade2, Sandip Bhojane3, Suvarna Kolekar2, Suvarna Patil3 and Atul Budukh1,2,b

1Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India

2Department of Medical Records and Cancer Registries, Centre for Cancer Epidemiology, Tata Memorial Centre, Mumbai 410210, India

3Bhaktashreshth Kamalakarpant Laxman Walawalkar Hospital, Dervan, Ratnagiri 415606, Maharashtra, India




Background: Cancer registries are valuable resources for cancer control and research. To justify their purpose, their data should be of satisfactory quality by being comparable internationally, complete in their coverage, valid in their values and timely in reporting. This study aimed to assess the quality of the Ratnagiri Population Based Cancer Registry’s data for the years 2017–18 across the four dimensions of data quality.

Methods: Regarding comparability, the registry procedure was reviewed vis-à-vis the rules they follow for cancer registry operation. We have used four methods for validity: re-abstraction and re-coding, diagnostic criteria methods- like the percentage of microscopically verified (MV%) and of death certificate only (DCO%) cases, missing information like proportion of cases of primary site unknown (PSU%) and internal validity. Semi-quantitative methods were employed for assessing completeness. Timeliness for all years of registry functioning was assessed qualitatively.

Results: The overall accuracy rate of the registry was found to be 91.1% (94.7% for demographic and 88% for tumour details). Mortality to incidence ratios were found to be 0.50 for females and 0.59 for males. MV% was found to be 90.8% for males and 91.5% for females. The average number of sources per case was found to be 1.5. DCO% was found to be 2.7%. PSU% was 7.4%.

Conclusion: We have positive results regarding the data’s validity and comparability, but there is scope for improvement concerning completeness. Continuous training of the registry personnel and monitoring of the registry is recommended.

Keywords: data quality, PBCRs, comparability, validity, completeness, timeliness

Correspondence to: Atul Budukh
Email: and

Published: 21/02/2024
Received: 14/11/2023

Publication costs for this article were supported by ecancer (UK Charity number 1176307).

Copyright: © the authors; licensee ecancermedicalscience. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The alarming increase in the cancer burden in low and middle-income countries (LMICs), as a product of epidemiological transition, has highlighted the need for strong evidence-based cancer control programmes in these countries [1]. Numerous population-based cancer registries (PBCRs) have been established across India to assess the disease burden and evaluate the cancer control activities implemented in the area [2]. The support of a PBCR as a source of incidence data enables the efficient planning, implementation and evaluation of cancer control programmes [3].

The mere presentation of cancer incidence figures is insufficient; rather, they must be reliable, representative, and relevant for effective utilisation. The quality of the statistics presented by PBCRs greatly affects the usability and rationality of their data [4]. The set-up of continuous and systematic quality control mechanisms is crucial for the smooth running of a cancer registry and to ensure an adequate level of confidence in data used for research [5, 6]. However, in today’s scenario, only one in three countries can report high-quality data on cancer incidence, as per the Global Initiative for Cancer Registration [7]. Good-quality cancer incidence data from LMICs in Asia, Africa and South America is scarce, as expressed in several volumes of the Cancer Incidence in Five Continents [8, 9].

India ranks third worldwide in terms of the number of incidence cases reported [10]. Therefore, it is essential that the data used by India for aetiological study designs, policy planning and programme implementation must be as accurate and representative as possible. Only then would the cancer control programmes planned and executed based on such data be successful [11].

In 2009, Tata Memorial Centre (TMC), a premier institute for cancer care and research in India, established a PBCR in the rural district of Ratnagiri in the Konkan division of Maharashtra state, with the support of and in the premises of Bhaktshreshtha Kamalakarpant Laxman Walawalkar (BKLW) Hospital, Chiplun, Maharashtra [12]. Besides its regular functions as a registry, it also provides support to an ongoing oral cancer screening cluster randomised trial in the district.

As an effort to improve the reporting of rural registries, this study aimed to assess the data quality of the Ratnagiri PBCR, in terms of the four dimensions of data quality as defined by the International Agency for Research on Cancer (IARC): comparability of the registry’s procedures with other registries and over time, completeness of coverage of cancer cases in the population, validity of the information reported and timeliness regarding procedure completion and data presentation [13, 14].

Materials and methods

This study was an observational cross-sectional study, carried out from November 2022 to April 2023, that assessed the data quality of the Ratnagiri PBCR located in coastal Maharashtra, India for the years 2017–18.

Ratnagiri PBCR covers a population of more than 1.6 million, as per the 2011 census of India, which is about 84% rural [15]. The PBCR was established to monitor the outcomes of an ongoing outreach programme back in 2009. Since then, it has been covering all cases arising from Ratnagiri district (which includes 9 talukas (sub-division of a district) and 1,537 villages). The coverage area of the PBCR has been highlighted in Figure 1. The registry employs an active strategy for data collection. Registry personnel visit hospitals, labs and many other sources within and outside the district to obtain information on cancer cases [12, 16]. They also seek information from the death certification office and make village visits for address confirmation and obtaining further details.

The data collected by the registry for the years 2017–18 and past reports were the primary source of data for this study. International standards were referred from various organizational guidelines and their publications including the International Classification of Diseases Tenth Edition (ICD-10), International Classification of Diseases-Oncology Third Edition (ICD-O-3), Cancer Incidence in Five Continents Volume XI (CI5 XI) and IARC technical publication no. 43 [1, 9, 17]. The values of all calculated parameters were compared with those of other Indian registries [1820].

Comparability was assessed by reviewing the definitions used by the registry for incidence cases and incidence date, the system used for classification and coding, and the rules adhered to for handling multiple primaries by the registry. Completeness was assessed through the following semi-quantitative methods.

(i) Historical data methods. Using already collected data from the registry database, we examined and compared geographic and temporal trends using the following methods:

• Stability of incidence rates over time.

• Comparison of age-adjusted incidence rates of Ratnagiri (2017–18) to those of Barshi (2012–16), both site and sex-wise. Statistically significant differences were flagged. Barshi was chosen as a comparable registry as both registries lie in the same state of Maharashtra and share features of rural demographics [18].

• Incidence of childhood cancers: The age-specific incidence rates of paediatric cancers (0–14 years) were calculated and compared to standards mentioned in CI5 [9].

(ii) Mortality: incidence ratios (MIRs). PBCR staff regularly conducts follow up of the registered cancer cases in the region and records date of death accordingly. Additionally, PBCR staff also collect death data from village/municipal death registration office and respective hospital death record departments to check the mortality. Mortality data on cancer by sex and site, for the period from 1st January 2017 to 31st December 2018, were obtained. Then, MIRs for each cancer site, sex-wise, were computed.

(iii) Average number of sources per case. The number of cases having one source, two sources and three sources was computed from CanReg5 data, and tabulated to calculate the average number of sources per incident case [21]. The average number of sources per case was calculated on the basis of all 1,897 cases.

The four sets of methods suggested by Bray and Parkin [13] that were used to assess validity are as follows.

(i) Reabstraction and recoding of cases. Using computer-generated random numbers, a simple random sample of 5% of the cases in the 2017–18 registry database was extracted. Individual reabstraction and recoding were carried out from the Electronic Medical Records of TMC and the registry proforma regarding the ten essential data items defined by MacLennan [22]. Their coding was carried out according to ICD-O-3 [17]. The coding for re-abstracted cases was done by researchers and validated by a senior staff from TMC, Mumbai. Differences between the original abstraction and reabstraction were tabulated and categorised as major and minor disagreements. The overall accuracy rate was calculated for the essential data items.

(ii) Basis of diagnosis methods. The proportion of cases that have a morphological/microscopic confirmation by histopathology, cytology, or haematology report (microscopically verified (MV%)) was estimated. The percentage of cases that have no other source of information except for a death certificate pointing to the cause of death or comorbidity as cancer (death certificate only (DCO%)), was estimated.

(iii) Missing information. The proportion of cases that have primary site unknown (PSU%) and the proportion of others and unspecified cases (O&U%) were identified from the registry database.

(iv) Internal consistency check. The IARC CHECK programme was used to estimate errors within the data [23].

Timeliness of all past years of registry functioning was assessed. There are no existing internationally defined standards, but a standard of within 2 years since the close of the registration year was used for comparison, inspired by American registries.


For the years 2017–18, the Ratnagiri PBCR registered a total of 1,897 incidence cases, out of which 834 cases were males (age-adjusted rate (AAR) 48.8 per 100,000) and 1,063 cases were females (AAR 53.8 per 100,000).


The registry includes only the malignant cases that occur in the district, therefore only behaviour codes 3 and 6 from the ICD-O-3 were considered [17]. Rules for recording incidence dates and multiple primaries were defined by the IARC-IACR recommendations [24]. The classification and coding of tumours’ topographic site, morphology, behaviour, grade and most valid basis of diagnosis were as per the ICD-O-3 [17]. A new code, 8, which is unassigned in the ICD-O-3, was used by the registry to accommodate cases diagnosed by verbal autopsy, a special procedure employed to compensate for the poor availability of cause of death data [25]. Both 0 (the code for DCO) and 8 were used to contribute to DCO cases.


By historical data methods

Stability of incidence rates: The years 2011–14 and 2015–16 showed the lowest reporting in the past 10 years of reporting, as shown in Table 1. Reporting seems to have improved in 2017–18. Figure 2 compares incidence rates of different PBCRs in India with Ratnagiri.

Rate ratios of incidence rates of leading sites of cancer: There was no significant difference observed between the overall rates of Ratnagiri and Barshi in both sexes. It is apparent in Table 2 that Ratnagiri reports a significantly higher incidence of mouth cancer than the Barshi registry across both sexes (males; RR 2.45, 95% CI 1.75–3.44 and females; RR = 3.54, 95% CI 2.10–5.95). Also, the rates for cervical cancer were 70% lower for Ratnagiri than Barshi (RR 0.30, 95% CI 0.23–0.40).

Figure 1. Coverage area of the Ratnagiri PBCR.

Table 1. Comparison of data quality parameters within registry over years of reporting.

Figure 2. Comparison of AAR per 100,000 of various Indian PBCRs with Ratnagiri PBCR.

Table 2. AARs, rate ratios and 95% confidence intervals for overall and top five leading sites for both males and females.

Incidence of childhood cancers: Except for the age-specific incidence rate for the 0–4 age group in boys, none of the rates for paediatric cancers were within the standard range given in CI5 XI, as can be seen in Table 3. Figure 3 depicts the comparison of incidence rates of paediatric cancers from different PBCRs in India.

Mortality to incidence ratios

The overall MIR for the Ratnagiri PBCR is 59% for males and 50% for females. Site-wise details are shown in Table 4. Figure 4 shows the comparison of MIRs across various Indian registries.

No. of sources per case

An average of 1.49 sources have been referred to per case. Out of the 1,897 cases, 1,110 cases were registered using only 1 source.

Table 3. Childhood cancer incidence in Ratnagiri for the years 2017–18 for both boys and girls.

Figure 3. Comparison of paediatric cancer rates in terms of AAR per million for age group 0–14 years across various Indian cancer registries.

Table 4. Comparison of MIR, MV% and incidence AAR with India specific standard as given in IARC technical report no. 43.

Figure 4. Comparison of MIR across various Indian cancer registries.


The registry has been reporting a delay of almost 4–5 years after the closing of the registration year, as can be seen in Table 1.


Reabstraction and recoding

A random sample of 101 cases (40 males and 61 females) was re-abstracted for 10 essential variables. Due to the unavailability of certain case records, some variables could not be re-abstracted for all cases. Table 5 mentions the number of cases for which each variable was re-abstracted, the number of disagreements (minor and major), and respective agreement per cent. The highest agreement was observed for name and sex (100%) and the lowest being for topography code (72.3%). The overall accuracy rate was observed to be 91.1%. The accuracy rate for demographic details was found to be 94.7% and for tumour, details were found to be 88%.

Table 5. Number of reabstractions carried out, number of disagreements and agreement in % for each data variable.

Basis of diagnosis methods

In males of Ratnagiri, MV% ranged from 62.5% to 100%, with an overall of 90.8%. In females of Ratnagiri, MV% ranged from 63.6% to 100%, with an overall of 91.5%. For site-wise elucidation, please refer to Table 4. Figure 5 shows the comparison of MV% of various Indian registries.

The DCO% estimate of the registry was 2.7% (3.12% for males and 2.35% for females). Figure 6 shows the comparison of DCO% of various Indian registries.

Internal validity

IARC CHECK Programme reported 467 errors and 42 warnings. On cross-checking individual records, most of these were found to be due to the internal usage of code 6 and mentions of lymph nodes as primary site, which are added to primary site unknown cases during data presentation.

Missing information

There was no missing information within each variable collected indicating internal data validity. Proportion of cases that belonged to C26, C48, C75, C76 and C80, i.e., other and ill-defined sites (O&U%) is 8.3%. Almost half of these cases belonged to geriatric age groups.

The proportion of cases that belonged to C80 i.e., primary site unknown (PSU%), is 7.4%.


Quality assessment of registries on a time-to-time basis ensures able and accurate reporting by them. Only two previous studies from India describe indicators of both completeness and validity of PBCRs: one study assessed the PBCRs covering Chandigarh (Union territory), SAS Nagar, Mansa and Sangrur districts in Punjab, while the other covered Kamrup Urban District in Assam [26, 27]. They too covered rural registries, but their catchment areas were not as populous as Ratnagiri. The overall results of this quality control exercise have been summarised in Figure 7.

Figure 5. Comparison of MV% across various Indian cancer registries.

Figure 6. Comparison of DCO% across various Indian cancer registries.

Figure 7. Graphical representation of results of quality control exercise of Ratnagiri PBCR.

Regarding comparability, Ratnagiri PBCR follows all international guidelines with minute modifications to accommodate the rules according to its settings. Thus, the registry was comparable to other registries in terms of definitions of data items like incidence date and classification and coding systems.

Age-adjusted incidence rates of Ratnagiri for the years 2017–18 are lower than most registries of India, as shown in Figure 2. Site-wise AARs are almost three times lesser than the standards mentioned in IARC technical report no. 43, as shown in Table 4. However, the AARs were comparable to another rural PBCR (Barshi) (Table 2). A reason for the low rates observed could be the wide urban-rural difference in cancer incidence in India [28].

Although not within the standard range mentioned in CI5 XI (as shown in Table 3), the registry’s paediatric rates are better than other Indian registries, as seen in Figure 3. Expert consultation provided as a collaboration between TMC and BKLW hospital has increased the accessibility of cancer care in the district and thus, increased the coverage of paediatric cases. Accessibility and availability of medical facilities are prerequisites for a cancer registry so that cancer cases undergo proper diagnosis and treatment at some clinical point of their disease [29].

The registry’s average number of sources per case is low (1.49) as compared to similar rural registries in Punjab like Sangrur (1.7) and Mansa (1.8) [26]. Covering multiple facilities during active case finding can significantly improve the quality of data [5, 30]. The Eastern Cape Cancer Registry, a rural registry in Africa, used 2 years of data collected from four hospitals to conclude that using a well-planned combination of active and passive methods improves case finding by more than 40% [30].

The DCO% estimate of the registry for the year 2017–18, i.e., 2.7% (3.12% for males and 2.35% for females) adheres to both the IARC-IACR standard (DCO less than 20%) and the Indian Council for Medical Research standards [18]. The DCO% estimate is lower than most Indian registries, as shown in Figure 6. Low DCO% indirectly suggests success in case finding [13]. The estimate has also improved as compared to reporting of past years, as shown in Table 1. A reason for this good DCO% estimate could be the employment of verbal autopsy technique in case registration which improved coverage [25].

The overall MV% was higher for females owing to the higher incidence of cancers of internal organs of the female reproductive system. For almost all sites, the MV% estimates were greater than the standards given in IARC technical report no. 43, as shown in Table 4. This is an indication of a biased case-finding procedure that is missing out on sources of radiological and clinical diagnoses [14]. However, as compared to previous years, MV% has decreased (as shown in Table 1), as more sources have been covered this year than in previous years. Nevertheless, such a high MV% indicates good accuracy of tumour details as per IARC standards [13].

The MIR for individual sites being significantly greater than the IARC-IACR India-specific standards (as shown in Table 4) leads to the suspicion that the registry may have missed some incident cases [1]. However, MIR has improved since the initial years of reporting, suggesting that with years, registry coverage has improved. The usage of MIR depends on the accuracy of the death registration system, hence, cannot be used in settings where the death registration is lacking [1]. The usage of verbal autopsy procedures to strengthen our mortality data has enabled us to use this estimate of completeness [25].

The overall accuracy rate was observed to be 91.1% which is lower as compared to other rural registries, like Sangrur (93.4%), and Mansa (94.2%) [26]. Accuracy rate for demographic details was 94.7%, which was lower than that of Mansa (99.3%) and Sangrur (98.6%) [26]. However, the accuracy rate for tumour details was observed to be 88% which is comparable to those observed for the PBCRs of Sangrur (89.1%) and Mansa (89.5%) [26].

Topography coding had the lowest agreement (72.3%) (Table 5). Most disagreements were minor, i.e., a difference was observed in the coding of the subsite [31] due to ignorance of detail. Incidence dates had around 15% disagreements, most of which were minor, i.e., were within the same month [31].

The proportion of missing values was low, which is a good indication as per the standards of IARC-IACR [13]. Almost 50% of cases of primary site unknown belong to the elderly age group, due to poor diagnosis of metastatic disease at advanced age.

Timeliness in registry reporting allows speedy access to cancer information for the benefit of research: affects relevance and reliability [13]. The registry has been consistently late in its reporting, as shown in Table 1. However, there is a paradox in data quality; the faster the data is reported, the more chance it has of being incomplete or having errors [4]. The registry covers a vast geographical area. Often, the registry staff do not receive cooperation from a few sources, hence causing a delay in reporting the data. As cancer is a rare disease, the rates aren’t likely to change significantly in a few years, due to which completeness has been prioritised. However, efforts must made to improve timeliness as well. After this exercise, it has been decided to speed up the process and publish the report in time.

Some objective obstacles impede the adherence of the international standards by the registry, by virtue of its LMIC settings [1]:

• The population is predominantly rural; with low availability and accessibility of medical facilities [15].

• The coverage area of the registry is hilly and houses are placed far apart. It becomes difficult to obtain accurate data regarding personal details and confirm addresses.

• The death registration system isn’t well developed and superstitious people refrain from sharing information about their dead relatives.

• Some hospitals and labs refuse sharing information with the registry personnel as they fear that the privacy of their patients shall be breached.

Keeping in mind all the discrepancies, the registry personnel were informed of the areas of improvement in the registration process. They have been encouraged to periodically assess their data quality internally as well as externally. Building good relationships with the healthcare community is crucial for a cancer registry’s functioning and data quality [5]. Making registry data publicly available on time would inspire the process of quality improvisation [3]. Therefore, the registry must aim to complete its reports within 2 years.

A major limitation of this study was that quantitative methods of estimating completeness couldn’t be used due to the limited availability of survival and mortality data.

On the bright side, this study was the first formal quality assessment of the Ratnagiri PBCR. We attained accurate estimates for various data quality descriptors. We have positive results, in favour of the registry having accurate data, considering DCO%, MV% and O&U%. Through the reabstraction exercise, we have ascertained deficient areas to guide training sessions. We have identified the need for improvisation of the case-finding procedure.

To ensure good data quality, Teppo et al [5] emphasized the need for an active research policy and staff proficient in medicine, biostatistics and computer science in a registry. Cancer registries must always strive to maintain a high standard of data quality by being complete and valid at all times, which is, ironically, their greatest challenge as a data collection effort [32].


The overall quality of the Ratnagiri PBCR’s data is satisfactory and has improved over the years. However, continuous monitoring and periodic quality assessment can further improve the registry’s reporting.


The authors acknowledge the support provided by Dr Sudeep Gupta (Director, TMC, Mumbai, India), Dr Rajendra Badwe (Ex-Director, TMC, Mumbai, India), Dr Rajesh Dikshit (Director, Centre for Cancer Epidemiology, TMC, Mumbai, India) and Dr Pankaj Chaturvedi (Dy. Director, Centre for Cancer Epidemiology, TMC, Mumbai, India) in running the network of PBCRs under TMC, Mumbai, India. The authors would also like to acknowledge the managing committee of Ratnagiri PBCR, registry personnel and the scientific staff CCE-TMC for their kind support and cooperation.

Conflicts of interest

None declared.



Author contributions

AB designed and supervised the study execution and contributed to writing the manuscript. SS was involved in study execution, literature review, data analysis, and manuscript writing. MS and SB were involved in data collection. MS and SK validated the study results. SP overlooked the study and data collection and lent assistance in writing the manuscript.

Data disclosure

During this study, tentative data from the year 2022 had been used for analysis. Meanwhile, the 2017-18 PBCR report has been updated later in 2023. Thus, there would be a few differences between the study findings and the registry’s report.

Ethical declaration

A waiver of consent (reference no. INW/2023/0228) has been obtained from the Institutional Ethics Committee (IEC) of Tata Memorial CentreTMC, Mumbai, India as the study involved no direct involvement of patients.


This study has been approved as a dissertation thesis by Homi Bhabha National Institute for partial fulfilment of Ms Samyukta Shivshankar’s MSc degree.


1. Bray F, Znaor A, and Cueva P, et al (2014) Planning and Developing Population-Based Cancer Registration in Low- and Middle-Income Settings (Lyon: IARC)

2. Rath GK and Gandhi AK (2014) National cancer control and registration program in India Indian J Med Paediatr Oncol 35(4) 288–290 PMID: 25538407 PMCID: 4264276

3. Chatterjee S, Chattopadhyay A, and Senapati SN, et al (2016) Cancer registration in India – current scenario and future perspectives Asian Pac J Cancer Prev 17(8) 3687–3696 PMID: 27644602

4. Wanner M, Matthes KL, and Korol D, et al (2018) Indicators of data quality at the Cancer Registry Zurich and Zug in Switzerland Biomed Res Int 2018 7656197 PMID: 30009174 PMCID: 6020656

5. Teppo L, Pukkala E, and Lehtonen M (1994) Data quality and quality control of a population-based cancer registry. Experience in Finland Acta Oncol Stockh Swed 33(4) 365–369

6. Lauricella LL, Costa PB, and Salati M, et al (2018) Measurement of the inter-rater reliability rate is mandatory for improving the quality of a medical database: experience with the Paulista Lung Cancer Registry J Am Coll Surg 226(6) 1128–1136 PMID: 29551696

7. The global initiative for cancer registry development [] Date accessed: 11/05/2023

8. Curado MP, Voti L, and Sortino-Rachou AM (2009) Cancer registration data and quality indicators in low and middle income countries: their interpretation and potential use for the improvement of cancer care Cancer Causes Control CCC 20(5) 751–756

9. Bray F, Colombet M, and Mery L, et al (ed) (2021) Cancer Incidence in Five Continents vol XI (Lyon: International Agency for Research on Cancer)

10. Global cancer observatory: cancer today [

11. Sigurdardottir LG, Jonasson JG, and Stefansdottir S, et al (2012) Data quality at the Icelandic Cancer Registry: comparability, validity, timeliness and completeness Acta Oncol 51(7) 880–889 PMID: 22974093

12. Balasubramaniam G, Cheulkar SA, and Joshi PK, et al (2023) Incidence of cancer in a rural registry in India-Ratnagiri, Maharashtra Indian J Med Sci 75 47–52

13. Bray F and Parkin DM (2009) Evaluation of data quality in the cancer registry: principles and methods. Part I: comparability, validity and timeliness Eur J Cancer Oxf Engl 45(5) 747–755

14. Parkin DM and Bray F (2009) Evaluation of data quality in the cancer registry: principles and methods Part II. Completeness Eur J Cancer Oxf Engl 45(5) 756–764

15. District Census Handbook, District Ratnagiri, Government of Maharashtra, India (Ratnagiri: Directorate of Census Operations) [] Date accessed: 10/10/2023

16. CCE-TMC (2020) Cancer Incidence and Mortality in Ratnagiri District, Maharashtra (2015-16), Mumbai (Ratnagiri: CCE-TMC) []

17. Fritz AG (ed) (2013) International Classification of Diseases for Oncology: ICD-O 3rd edn (Geneva: World Health Organization)

18. ICMR-NCDIR (2020) Report of National Cancer Registry Programme (Bengaluru: ICMR-NCDIR)

19. Budukh A, Khanna D, and Bagal S, et al (2022) Cancer Incidence and Mortality in Varanasi District, Uttar Pradesh, India: 2018-19 (Mumbai: Tata Memorial Centre) []

20. Centre for Cancer Epidemiology-Tata Memorial Centre and Post Graduate Institute of Medical Education and Research (2016) Summary Report of Cancer Registries in Punjab and Chandigarh (Mumbai: Centre for Cancer Epidemiology-Tata Memorial Centre, Post Graduate Institute of Medical Education and Research) []

21. Ervik M, Cooke A, and Ferlay J, et al (2008) CanReg5 Open Source Software for Cancer Registries (Lyon: International Agency for Research on Cancer- International Association for Cancer Registries) []

22. MacLennan R (1991) Items of patient information which may be collected by registries Cancer Registration: Principles and Methods (Lyon: IARC) pp 43–63

23. IARC-IACR (2018) Check and Conversion Program (Lyon: IARC-IACR) []

24. IACR – standards [] Date accessed: 10/05/2023

25. Khanna D, Budukh A, and Sharma P, et al (2023) Role of verbal autopsy in cancer registration: a mixed-methods study from the population-based cancer registry of Northern India Trop Med Int Health 28(8) 629–640 PMID: 37430444

26. Bashar M, Thakur J, and Budukh A (2021) Evaluation of data quality of four new population based cancer registries (PBCRs) in Chandigarh and Punjab, North India – a quality control study Asian Pac J Cancer Prev 22(5) 1421–1433 PMID: 34048170 PMCID: 8408406

27. Sharma A, Sharma JD, and Kataki AC, et al (2017) Quality assessment and improvement of cancer registration system in Kamrup Urban District: a report Indian J Cancer 54(3) 560–565

28. Mathur P, Sathishkumar K, and Chaturvedi M, et al (2020) Cancer statistics, 2020: report from National Cancer Registry Programme, India JCO Glob Oncol 6(6) 1063–1075 PMID: 32673076 PMCID: 7392737

29. Jensen OM and Storm HH (1991) Purposes and uses of cancer registration Cancer Registration: Principles and Methods (Lyon: IARC) pp 7–21

30. Somdyala NI, Mbuthini L, and Müller B, et al (2021) Active case-finding method improves completeness and accuracy of data reported to the rural Eastern Cape Cancer Registry in South Africa Ecancermedicalscience 15 1251 PMID: 34267807 PMCID: 8241446

31. Hilsenbeck S, Glaefke G, and Fiegl P, et al (1985) Definitions for Minor and Major Disagreements and Standards for Reabstracting (Seattle: CCPDS)

32. Lee B, Gately L, and Lok SW, et al (2022) Leveraging comprehensive cancer registry data to enable a broad range of research, audit and patient support activities Cancers 14(17) 4131 PMID: 36077668 PMCID: 9454529

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