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Siegel et al 1 described patterns of colorectal cancer (CRC) incidence in young adults worldwide. In India, their estimates were based on data from a single population-based cancer registry (PBCR) in the southern Indian state of Tamil Nadu, representing 0.5% of Indian population (Chennai PBCR). India is a large country of more than a billion people. We analysed data from 14 PBCRs, representing 65 million people (5% of Indian population).2 PBCRs included in our study were Ahmedabad, Bangalore, Barshi, Bhopal, Chennai, Delhi, Dibrugarh, Kamrup, Kolkata, Manipur, Mizoram, Mumbai, Sikkim and Thiruvananthapuram.
We calculated age-standardised incidence rates (according to WHO World Standard Population 2000) for 5-year age groups for periods of diagnosis (2004–2005, 2006–2008, 2009–2011, 2012–2014), and categorised them as …
Contributors All authors made significant contributions to the manuscript.
Funding This study was supported by Markey Cancer Center grant awarded to Aju Mathew.
Competing interests None declared.
Patient consent for publication Not required.
Provenance and peer review Not commissioned; internally peer reviewed.
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