A comparison of participants and non-participants in the Chennai glaucoma study-rural population

Pradeep G. Paul, Ronnie J. George, Mani Baskaran, Hemamalini Arvind, Madan Raj Augustian, S. Ve Ramesh, Prema Sriram, Govindasamy Kumaramanickavel, Catherine McCarty, Lingam Vijaya

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Abstract

Purpose: To study whether the difference in the demographic characteristics of participants and non-participants could result in biased prevalence estimates and associations. Aim: To compare the non-participant & participant characteristics, and to ascertain if non-response bias is present in the rural population of the Chennai Glaucoma Study (CGS). Methods: Rural participants and non-participants were compared with regard to socio-demographic variables (age, gender, religion, mother tongue, literacy and employment). Results: 4800 subjects aged 40 years or over were enumerated, 82% (3934: 45% male and 55% female) responded. Gender did not influence participation (adjusted OR-1.11, CI: .91-1.36). Subjects in the 70-79 year age group were more likely to respond (OR-1.76; CI-1.31-2.38). Hindus had a higher participation rate than Christians or Muslims (adjusted OR-2.63, CI: 1.80-3.84). The other predictors of participation were illiteracy (adjusted OR-1.44, CI: 1.22-1.70), unemployment (OR-1.28, CI: 1.04-1.58), place of residence (main villages) (OR-1.89, 95% CI: 1.59-2.25) and cottage industry-based villages (OR-6.66, 95% CI: 4.6-9.64). Conclusion: Based on our study findings, it does not seem likely that participation bias will affect the study results.

Original languageEnglish
Pages (from-to)125-132
Number of pages8
JournalOphthalmic Epidemiology
Volume12
Issue number2
DOIs
Publication statusPublished - 01-04-2005

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Rural Population
Glaucoma
Demography
Islam
Unemployment
Religion
Tongue
Industry
Age Groups
Mothers
Literacy

All Science Journal Classification (ASJC) codes

  • Epidemiology
  • Ophthalmology

Cite this

Paul, Pradeep G. ; George, Ronnie J. ; Baskaran, Mani ; Arvind, Hemamalini ; Augustian, Madan Raj ; Ve Ramesh, S. ; Sriram, Prema ; Kumaramanickavel, Govindasamy ; McCarty, Catherine ; Vijaya, Lingam. / A comparison of participants and non-participants in the Chennai glaucoma study-rural population. In: Ophthalmic Epidemiology. 2005 ; Vol. 12, No. 2. pp. 125-132.
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abstract = "Purpose: To study whether the difference in the demographic characteristics of participants and non-participants could result in biased prevalence estimates and associations. Aim: To compare the non-participant & participant characteristics, and to ascertain if non-response bias is present in the rural population of the Chennai Glaucoma Study (CGS). Methods: Rural participants and non-participants were compared with regard to socio-demographic variables (age, gender, religion, mother tongue, literacy and employment). Results: 4800 subjects aged 40 years or over were enumerated, 82{\%} (3934: 45{\%} male and 55{\%} female) responded. Gender did not influence participation (adjusted OR-1.11, CI: .91-1.36). Subjects in the 70-79 year age group were more likely to respond (OR-1.76; CI-1.31-2.38). Hindus had a higher participation rate than Christians or Muslims (adjusted OR-2.63, CI: 1.80-3.84). The other predictors of participation were illiteracy (adjusted OR-1.44, CI: 1.22-1.70), unemployment (OR-1.28, CI: 1.04-1.58), place of residence (main villages) (OR-1.89, 95{\%} CI: 1.59-2.25) and cottage industry-based villages (OR-6.66, 95{\%} CI: 4.6-9.64). Conclusion: Based on our study findings, it does not seem likely that participation bias will affect the study results.",
author = "Paul, {Pradeep G.} and George, {Ronnie J.} and Mani Baskaran and Hemamalini Arvind and Augustian, {Madan Raj} and {Ve Ramesh}, S. and Prema Sriram and Govindasamy Kumaramanickavel and Catherine McCarty and Lingam Vijaya",
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Paul, PG, George, RJ, Baskaran, M, Arvind, H, Augustian, MR, Ve Ramesh, S, Sriram, P, Kumaramanickavel, G, McCarty, C & Vijaya, L 2005, 'A comparison of participants and non-participants in the Chennai glaucoma study-rural population', Ophthalmic Epidemiology, vol. 12, no. 2, pp. 125-132. https://doi.org/10.1080/09286580590932798

A comparison of participants and non-participants in the Chennai glaucoma study-rural population. / Paul, Pradeep G.; George, Ronnie J.; Baskaran, Mani; Arvind, Hemamalini; Augustian, Madan Raj; Ve Ramesh, S.; Sriram, Prema; Kumaramanickavel, Govindasamy; McCarty, Catherine; Vijaya, Lingam.

In: Ophthalmic Epidemiology, Vol. 12, No. 2, 01.04.2005, p. 125-132.

Research output: Contribution to journalArticle

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T1 - A comparison of participants and non-participants in the Chennai glaucoma study-rural population

AU - Paul, Pradeep G.

AU - George, Ronnie J.

AU - Baskaran, Mani

AU - Arvind, Hemamalini

AU - Augustian, Madan Raj

AU - Ve Ramesh, S.

AU - Sriram, Prema

AU - Kumaramanickavel, Govindasamy

AU - McCarty, Catherine

AU - Vijaya, Lingam

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N2 - Purpose: To study whether the difference in the demographic characteristics of participants and non-participants could result in biased prevalence estimates and associations. Aim: To compare the non-participant & participant characteristics, and to ascertain if non-response bias is present in the rural population of the Chennai Glaucoma Study (CGS). Methods: Rural participants and non-participants were compared with regard to socio-demographic variables (age, gender, religion, mother tongue, literacy and employment). Results: 4800 subjects aged 40 years or over were enumerated, 82% (3934: 45% male and 55% female) responded. Gender did not influence participation (adjusted OR-1.11, CI: .91-1.36). Subjects in the 70-79 year age group were more likely to respond (OR-1.76; CI-1.31-2.38). Hindus had a higher participation rate than Christians or Muslims (adjusted OR-2.63, CI: 1.80-3.84). The other predictors of participation were illiteracy (adjusted OR-1.44, CI: 1.22-1.70), unemployment (OR-1.28, CI: 1.04-1.58), place of residence (main villages) (OR-1.89, 95% CI: 1.59-2.25) and cottage industry-based villages (OR-6.66, 95% CI: 4.6-9.64). Conclusion: Based on our study findings, it does not seem likely that participation bias will affect the study results.

AB - Purpose: To study whether the difference in the demographic characteristics of participants and non-participants could result in biased prevalence estimates and associations. Aim: To compare the non-participant & participant characteristics, and to ascertain if non-response bias is present in the rural population of the Chennai Glaucoma Study (CGS). Methods: Rural participants and non-participants were compared with regard to socio-demographic variables (age, gender, religion, mother tongue, literacy and employment). Results: 4800 subjects aged 40 years or over were enumerated, 82% (3934: 45% male and 55% female) responded. Gender did not influence participation (adjusted OR-1.11, CI: .91-1.36). Subjects in the 70-79 year age group were more likely to respond (OR-1.76; CI-1.31-2.38). Hindus had a higher participation rate than Christians or Muslims (adjusted OR-2.63, CI: 1.80-3.84). The other predictors of participation were illiteracy (adjusted OR-1.44, CI: 1.22-1.70), unemployment (OR-1.28, CI: 1.04-1.58), place of residence (main villages) (OR-1.89, 95% CI: 1.59-2.25) and cottage industry-based villages (OR-6.66, 95% CI: 4.6-9.64). Conclusion: Based on our study findings, it does not seem likely that participation bias will affect the study results.

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