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Receiver operating characteristic (ROC) curve for medical researchers.
Kumar R, Indrayan A. Kumar R, et al. Among authors: indrayan a. Indian Pediatr. 2011 Apr;48(4):277-87. doi: 10.1007/s13312-011-0055-4. Indian Pediatr. 2011. PMID: 21532099
Sensitivity and specificity are two components that measure the inherent validity of a diagnostic test for dichotomous outcomes against a gold standard. ...This is an effective method for assessing the performance of a diagnostic test. The aim of this article …
Sensitivity and specificity are two components that measure the inherent validity of a diagnostic test for dichotomous outcomes again …
Computer based statistical study of cartography in mortality upto age of one year.
Bansal AK, Indrayan A. Bansal AK, et al. Among authors: indrayan a. Indian Pediatr. 1993 Oct;30(10):1251-8. Indian Pediatr. 1993. PMID: 8077024
Present cartography procedures for quantitative indicators are arbitrary on choice of the number of categories in which a particular area is to be divided. ...To remove this arbitrariness and thus to introduce objectivity, we propose use of a statistical procedure c …
Present cartography procedures for quantitative indicators are arbitrary on choice of the number of categories in which a particular …
Evaluation of quality of multivariable logistic regression in Indian medical journals using multilevel modeling approach.
Kumar R, Indrayan A, Chhabra P. Kumar R, et al. Among authors: indrayan a. Indian J Public Health. 2016 Apr-Jun;60(2):99-106. doi: 10.4103/0019-557X.184538. Indian J Public Health. 2016. PMID: 27350702
Of a total 5599 original articles in these journals, 262 (4.68%) applied MLR in their study. Conformity of linear gradient assumption for continuous covariate was the least fulfilled criterion. ...The average quality score was 3.78 (95% confidence interval: 2.97-4.60) out …
Of a total 5599 original articles in these journals, 262 (4.68%) applied MLR in their study. Conformity of linear gradient assumption …
Diagnostic questionnaire and its validation. Biostatistician's perspective.
Indrayan A. Indrayan A. Indian Pediatr. 2014 Jul;51(7):536-8. Indian Pediatr. 2014. PMID: 25031130 No abstract available.
Demystifying LMS and BCPE methods of centile estimation for growth and other health parameters.
Indrayan A. Indrayan A. Indian Pediatr. 2014 Jan;51(1):37-43. doi: 10.1007/s13312-014-0310-6. Indian Pediatr. 2014. PMID: 24561465
As a result, the methods are used by experts only. Non-experts use software as a blackbox that can lead to wrong curves. This article explains these methods in a simple non-mathematical language so that medical professionals can use them correctly and confide …
As a result, the methods are used by experts only. Non-experts use software as a blackbox that can lead to wrong curves. This …
Effect of vitamin A supplementation on childhood morbidity and mortality: critical review of Indian studies.
Gupta P, Indrayan A. Gupta P, et al. Among authors: indrayan a. Indian Pediatr. 2002 Dec;39(12):1099-118. Indian Pediatr. 2002. PMID: 12522272
Out of 4 mortality trials, only one could satisfactorily report a significant reduction (54 percent) in child mortality following vitamin A supplementation. ...There is a clear need to undertake a comprehensive trial with adequate sample size and a
Out of 4 mortality trials, only one could satisfactorily report a significant reduction (54 percent) in child mortality following vit …
Statistical fallacies in orthopedic research.
Indrayan A. Indrayan A. Indian J Orthop. 2007 Jan;41(1):37-46. doi: 10.4103/0019-5413.30524. Indian J Orthop. 2007. PMID: 21124681 Free PMC article.
MATERIALS AND METHODS: This article provides a general review of the issues that could give rise to statistical fallacies with focus on orthopedic research. ...CONCLUSION: Mere awareness of the situations where statistical fallacies can occur may be adequate for researcher …
MATERIALS AND METHODS: This article provides a general review of the issues that could give rise to statistical fallacies with focus …
Statistical fallacies & errors can also jeopardize life & health of many.
Indrayan A. Indrayan A. Indian J Med Res. 2018 Dec;148(6):677-679. doi: 10.4103/ijmr.IJMR_853_18. Indian J Med Res. 2018. PMID: 30778000 Free PMC article. No abstract available.
A comprehensive index for longitudinal monitoring of child health status.
Satyanarayana L, Indrayan A, Sachdev HP, Gupta SM. Satyanarayana L, et al. Among authors: indrayan a. Indian Pediatr. 1995 Apr;32(4):443-52. Indian Pediatr. 1995. PMID: 8635808
The comprehensive index was obtained as a linear combination of these two factors. The resultant index thus fairly represented all five mortality indicators and provided a comprehensive and reasonably correct picture of child mortality. ...This study resulted in the …
The comprehensive index was obtained as a linear combination of these two factors. The resultant index thus fairly represented all fi …
Statistical medicine: An emerging medical specialty.
Indrayan A. Indrayan A. J Postgrad Med. 2017 Oct-Dec;63(4):252-256. doi: 10.4103/jpgm.JPGM_189_17. J Postgrad Med. 2017. PMID: 29022563 Free PMC article.
A large number of statistical tools are now used for medical decision in the core activities of diagnosis, treatment and prognosis. ...Time has arrived to recognize statistical medicine as a medical specialty....
A large number of statistical tools are now used for medical decision in the core activities of diagnosis, treatment and prognosis. .
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