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About CTRI

Clinical trials hold enormous potential for benefiting patients, improving therapeutic regimens and ensuring advancement in medical practice that is evidence based. Unfortunately, the data and reports of various trials are often difficult to find and in some cases do not even exist as many trials abandoned or are not published due to "negative" or equivocal results. However, this tendency for availability of only selective information from the myriad clinical trials conducted is not commensurate with the practice of "evidence-based medicine". Today, world over, a need has been felt on the imperative for transparency, accountability and accessibility in order to re-establish public trust in clinical trial data. And this would be feasible only if all clinical trials conducted are registered in a centralized clinical trials registry. Registration of trials will ensure transparency, accountability and accessibility of clinical trials.

The Clinical Trials Registry- India (CTRI), hosted at the ICMRs National Institute of Medical Statistics (NIMS), is a free and online public record system for registration of clinical trials being conducted in India that was launched on 20th July 2007 ( Initiated as a voluntary measure, since 15th June 2009, trial registration in the CTRI has been made mandatory by the Drugs Controller General (India) (DCGI) ( Moreover, Editors of Biomedical Journals of 11 major journals of India declared that only registered trials would be considered for publication1, 2.

Today, any researcher who plans to conduct a trial involving human participants, of any intervention such as drugs, surgical procedures, preventive measures, lifestyle modifications, devices, educational or behavioral treatment, rehabilitation strategies as well as trials being conducted in the purview of the Department of AYUSH ( is expected to register the trial in the CTRI before enrollment of the first participant. Trial registration involves public declaration and identification of trial investigators, sponsors, interventions, patient population etc before the enrollment of the first patient. Submission of Ethics approval and DCGI approval (if applicable) is essential for trial registration in the CTRI. Multi-country trials, where India is a participating country, which have been registered in an international registry, are also expected to be registered in the CTRI. In the CTRI, details of Indian investigators, trial sites, Indian target sample size and date of enrollment are captured. After a trial is registered, trialists are expected to regularly update the trial status or other aspects as the case may be. After a trial is registered, all updates and changes will be recorded and available for public display.

Being a Primary Register of the International Clinical Trials Registry Platform (ICTRP) (, registered trials are freely searchable both from the WHOs search portal, the ICTRP as well as from the CTRI (


The mission of the Clinical Trials Registry-India (CTRI) is to encourage all clinical trials conducted in India to be prospectively registered, i.e. before the enrolment of the first participant.

While the mission of the CTRI is to encourage all clinical trials conducted in India to be prospectively registered before the enrollment of the first participant currently, trials where patient recruitment has started or even completed are also being registered. Post-marketing surveillance studies as well as BA/BE trials are also expected to be registered in the CTRI.


The vision of the CTRI is to ensure that every clinical trial conducted in the region is prospectively registered with full disclosure of the trial data set items. While this register is meant primarily for trials conducted in India, the CTRI will also accept registration of trials conducted in other countries in the region, which do not have a Primary Registry of its own.

Trials registered in CTRI will be monitored to ensure increasing voluntary disclosure of all items in the register. These items have been selected in order to:

Improve transparency and accountability3: By disclosing all required details of the protocol of trials, public confidence in clinical trials is likely to be enhanced.

Improve the internal validity of trials: Empirical research has shown that some aspect of the methods of the trial are particularly important to produce reliable results by minimizing biases, confounders and the effects of chance or coincidence. These include the method of random sequence generation, adequate concealment of allocation of participants to interventions, adequate blinding of participants, investigators and outcome assessors, and inclusion of all participants' results4, 5. The CTRI hopes that these items, though not mandatory at present, will be disclosed by all registrants, as incorporating such elements at the protocol stage is likely to increase the internal validity of the trial and also increase the chances of publication in a high impact journal that endorses the ICMJE requirement of reporting trials in accordance with the CONSORT statement6, 7.

Conform to accepted ethical standards: The Indian Council of Medical Research through its Bio-ethics initiative has developed ethical guidelines for the conduct of trials and for ethics committees8. Clearance by local ethics committees is mandatory for all clinical trials and the CTRI hopes that making disclosure of ethical clearance a mandatory field for registration, it will lead to better links with the ICMR's bio-ethics initiative.

Reporting of all relevant results of registered trials: The CTRI is working with the WHO ICTRP to ensure that results of all trials registered with the CTRI are adequately reported and publicly available.




  1. Pandey A, Aggarwal AR, Seth SD, Maulik, M, Bano R. Juneja A. Clinical Trials Registry India: Redefining the conduct of clinical trials. Indian J Cancer 2008; 45 (3): 79-82.
  2. Pandey A, Aggarwal A, Maulik, M, Seth SD. Clinical trial registration gains momentum in India. Indian J Med Res [Letter to Editor] 2009; 130: 85-86.
  3. Pandey A, Aggarwal AR, Seth SD, Maulik, M. Clinical Trials Registry India: Raising the veil. Natl Med J India [Letter to Editor]2010; 23 (3):187 -188.
  4. Schulz KF, Chalmers I, Hayes RJ, Altman D. Empirical evidence of bias. Dimensions of methodological quality associated with estimates of treatment effects in controlled clinical trials. JAMA 1995; 273:408-12.
  5. Jni P, Altman DG, Egger M. Assessing the quality of controlled clinical trials. BMJ 2001; 323: 42-6.
  6. Altman DG, Schulz KF, Moher D for the CONSORT Group. The revised CONSORT statement for reporting randomized trials: explanation and elaboration. Ann Intern Med 2001; 134: 663-94.
  7. International Committee of Medical Journal Editors (ICMJE). Uniform Requirements for Manuscripts Submitted to Biomedical Journals. Available at
  8. Indian Council of Medical Research. Ethical Guidelines for Biomedical Research on Human Subjects. New Delhi: Indian Council of Medical Research, 2000.