Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India

Aleyamma Mathew; Carrie R. Daniel; Leah M. Ferrucci; Tulika Seth; Susan S. Devesa; Preethi S. George; Hemali Shetty; Niveditha Devasenapathy; Susan Yurgalevitch; Tanuja Rastogi; Dorairaj Prabhakaran; Prakash C. Gupta; Nilanjan Chatterjee; Rashmi Sinha

doi:10.1016/j.canep.2011.03.006

Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India

Aleyamma Mathew, Carrie R. Daniel, Leah M. Ferrucci, Tulika Seth, Susan S. Devesa, Preethi S. George, Hemali Shetty, Niveditha Devasenapathy, Susan Yurgalevitch, Tanuja Rastogi, Dorairaj Prabhakaran, Prakash C. Gupta, Nilanjan Chatterjee, Rashmi Sinha

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Background: A prospective study of diet and cancer has not been conducted in India; consequently, little is known regarding follow-up rates or the completeness and accuracy of cancer case ascertainment. Methods: We assessed follow-up in the India Health Study (IHS; 4671 participants aged 35-69 residing in New Delhi, Mumbai, or Trivandrum). We evaluated the impact of medical care access and relocation, re-contacted the IHS participants to estimate follow-up rates, and conducted separate studies of cancer cases to evaluate registry coverage (604 cases in Trivandrum) and the accuracy of self- and proxy-reporting (1600 cases in New Delhi and Trivandrum). Results: Over 97% of people reported seeing a doctor and 85% had lived in their current residence for over six years. The 2-year follow-up rate was 91% for Trivandrum and 53% for New Delhi. No cancer cases were missed among public institutions participating in the surveillance program in Trivandrum during 2003-2004; but there are likely to be unmatched cases (ranging from 5 to 13% of total cases) from private hospitals in the Trivandrum registry, as there are no mandatory reporting requirements. Vital status was obtained for 36% of cancer cases in New Delhi as compared to 78% in Trivandrum after a period of 4 years. Conclusions: A prospective cohort study of cancer may be feasible in some centers in India with active follow-up to supplement registry data. Inclusion of cancers diagnosed at private institutions, unique identifiers for individuals, and computerized medical information would likely improve cancer registries.

Original language	English (US)
Pages (from-to)	334-341
Number of pages	8
Journal	Cancer Epidemiology
Volume	35
Issue number	4
DOIs	https://doi.org/10.1016/j.canep.2011.03.006
State	Published - Aug 2011
Externally published	Yes

Keywords

Cancer
End-point
Follow-up
India
Prospective cohort
Registry

ASJC Scopus subject areas

Epidemiology
Oncology
Cancer Research

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10.1016/j.canep.2011.03.006

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Mathew, A., Daniel, C. R., Ferrucci, L. M., Seth, T., Devesa, S. S., George, P. S., Shetty, H., Devasenapathy, N., Yurgalevitch, S., Rastogi, T., Prabhakaran, D., Gupta, P. C., Chatterjee, N., & Sinha, R. (2011). Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India. Cancer Epidemiology, 35(4), 334-341. https://doi.org/10.1016/j.canep.2011.03.006

Mathew, A, Daniel, CR, Ferrucci, LM, Seth, T, Devesa, SS, George, PS, Shetty, H, Devasenapathy, N, Yurgalevitch, S, Rastogi, T, Prabhakaran, D, Gupta, PC, Chatterjee, N & Sinha, R 2011, 'Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India', Cancer Epidemiology, vol. 35, no. 4, pp. 334-341. https://doi.org/10.1016/j.canep.2011.03.006

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title = "Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India",

abstract = "Background: A prospective study of diet and cancer has not been conducted in India; consequently, little is known regarding follow-up rates or the completeness and accuracy of cancer case ascertainment. Methods: We assessed follow-up in the India Health Study (IHS; 4671 participants aged 35-69 residing in New Delhi, Mumbai, or Trivandrum). We evaluated the impact of medical care access and relocation, re-contacted the IHS participants to estimate follow-up rates, and conducted separate studies of cancer cases to evaluate registry coverage (604 cases in Trivandrum) and the accuracy of self- and proxy-reporting (1600 cases in New Delhi and Trivandrum). Results: Over 97% of people reported seeing a doctor and 85% had lived in their current residence for over six years. The 2-year follow-up rate was 91% for Trivandrum and 53% for New Delhi. No cancer cases were missed among public institutions participating in the surveillance program in Trivandrum during 2003-2004; but there are likely to be unmatched cases (ranging from 5 to 13% of total cases) from private hospitals in the Trivandrum registry, as there are no mandatory reporting requirements. Vital status was obtained for 36% of cancer cases in New Delhi as compared to 78% in Trivandrum after a period of 4 years. Conclusions: A prospective cohort study of cancer may be feasible in some centers in India with active follow-up to supplement registry data. Inclusion of cancers diagnosed at private institutions, unique identifiers for individuals, and computerized medical information would likely improve cancer registries.",

keywords = "Cancer, End-point, Follow-up, India, Prospective cohort, Registry",

author = "Aleyamma Mathew and Daniel, {Carrie R.} and Ferrucci, {Leah M.} and Tulika Seth and Devesa, {Susan S.} and George, {Preethi S.} and Hemali Shetty and Niveditha Devasenapathy and Susan Yurgalevitch and Tanuja Rastogi and Dorairaj Prabhakaran and Gupta, {Prakash C.} and Nilanjan Chatterjee and Rashmi Sinha",

year = "2011",

month = aug,

doi = "10.1016/j.canep.2011.03.006",

language = "English (US)",

volume = "35",

pages = "334--341",

journal = "Cancer Epidemiology",

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T1 - Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India

AU - Mathew, Aleyamma

AU - Daniel, Carrie R.

AU - Ferrucci, Leah M.

AU - Seth, Tulika

AU - Devesa, Susan S.

AU - George, Preethi S.

AU - Shetty, Hemali

AU - Devasenapathy, Niveditha

AU - Yurgalevitch, Susan

AU - Rastogi, Tanuja

AU - Prabhakaran, Dorairaj

AU - Gupta, Prakash C.

AU - Chatterjee, Nilanjan

AU - Sinha, Rashmi

PY - 2011/8

Y1 - 2011/8

N2 - Background: A prospective study of diet and cancer has not been conducted in India; consequently, little is known regarding follow-up rates or the completeness and accuracy of cancer case ascertainment. Methods: We assessed follow-up in the India Health Study (IHS; 4671 participants aged 35-69 residing in New Delhi, Mumbai, or Trivandrum). We evaluated the impact of medical care access and relocation, re-contacted the IHS participants to estimate follow-up rates, and conducted separate studies of cancer cases to evaluate registry coverage (604 cases in Trivandrum) and the accuracy of self- and proxy-reporting (1600 cases in New Delhi and Trivandrum). Results: Over 97% of people reported seeing a doctor and 85% had lived in their current residence for over six years. The 2-year follow-up rate was 91% for Trivandrum and 53% for New Delhi. No cancer cases were missed among public institutions participating in the surveillance program in Trivandrum during 2003-2004; but there are likely to be unmatched cases (ranging from 5 to 13% of total cases) from private hospitals in the Trivandrum registry, as there are no mandatory reporting requirements. Vital status was obtained for 36% of cancer cases in New Delhi as compared to 78% in Trivandrum after a period of 4 years. Conclusions: A prospective cohort study of cancer may be feasible in some centers in India with active follow-up to supplement registry data. Inclusion of cancers diagnosed at private institutions, unique identifiers for individuals, and computerized medical information would likely improve cancer registries.

AB - Background: A prospective study of diet and cancer has not been conducted in India; consequently, little is known regarding follow-up rates or the completeness and accuracy of cancer case ascertainment. Methods: We assessed follow-up in the India Health Study (IHS; 4671 participants aged 35-69 residing in New Delhi, Mumbai, or Trivandrum). We evaluated the impact of medical care access and relocation, re-contacted the IHS participants to estimate follow-up rates, and conducted separate studies of cancer cases to evaluate registry coverage (604 cases in Trivandrum) and the accuracy of self- and proxy-reporting (1600 cases in New Delhi and Trivandrum). Results: Over 97% of people reported seeing a doctor and 85% had lived in their current residence for over six years. The 2-year follow-up rate was 91% for Trivandrum and 53% for New Delhi. No cancer cases were missed among public institutions participating in the surveillance program in Trivandrum during 2003-2004; but there are likely to be unmatched cases (ranging from 5 to 13% of total cases) from private hospitals in the Trivandrum registry, as there are no mandatory reporting requirements. Vital status was obtained for 36% of cancer cases in New Delhi as compared to 78% in Trivandrum after a period of 4 years. Conclusions: A prospective cohort study of cancer may be feasible in some centers in India with active follow-up to supplement registry data. Inclusion of cancers diagnosed at private institutions, unique identifiers for individuals, and computerized medical information would likely improve cancer registries.

KW - Cancer

KW - End-point

KW - Follow-up

KW - India

KW - Prospective cohort

KW - Registry

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DO - 10.1016/j.canep.2011.03.006

M3 - Article

C2 - 21621499

AN - SCOPUS:79960002199

SN - 1877-7821

VL - 35

SP - 334

EP - 341

JO - Cancer Epidemiology

JF - Cancer Epidemiology

IS - 4

ER -

Assessment of follow-up, and the completeness and accuracy of cancer case ascertainment in three areas of India

Abstract

Keywords

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