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Estimation of Under-Reporting of Visceral Leishmaniasis Cases in Bihar, India

Vijay P. SinghDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Alok RanjanDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Roshan K. TopnoDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Rakesh B. VermaDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Niyamat A. SiddiqueDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Vidya N. RavidasDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Narendra KumarDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Krishna PandeyDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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Pradeep DasDivision of Epidemiology and Biostatistics, Division of Clinical Medicine, and Division of Social Sciences, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Patna, Bihar, India

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We estimated the level of under-reporting of visceral leishmaniasis (VL) cases by comparing the actual reported cases with those expected as estimated using age- and sex-stratified incidence proportions obtained in a cohort of 31,324 persons. The average incidence proportion of VL cases in study population was 5.7/1,000 (95% confidence interval [CI] = 4.88–6.54) and 1.09/1,000 persons (95% CI = 0.99–1.20) based on the reported cases in two primary health centers. The overall magnitude of VL cases not reported to the government agencies was higher by a factor 4.17 (95% CI = 3.75–4.63) than for reported cases. The levels of under-reporting were 4.74 (95% CI = 4.11–5.47) in males and 3.51 (95% CI = 2.99–4.11) in females with no significant difference (P > 0.05). It was significantly higher in persons ≥ 30 years of age than in persons 30 years of age (P < 0.05).

Author Notes

*Address correspondence to Vijay P. Singh, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Agam Kuan, Patna, PIN Code 800 007, Bihar, India. E-mail: drvpsingh20@yahoo.com

Authors' address: Vijay P. Singh, Alok Ranjan, Roshan K. Topno, Rakesh B. Verma, Niyamat A. Siddique, Vidya N. Ravidas, Narendra Kumar, Krishna Pandey, and Pradeep Das, Rajendra Memorial Research Institute of Medical Science, Indian Council of Medical Research, Agam Kuan, Patna, PIN Code 800 007, Bihar, India.

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