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. 2020 Nov 30;41(1):21–36. doi: 10.1177/0272989X20971589

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© The Author(s) 2020

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Schematic of 3 hypothetical persons in survival analysis 1 (from NW to OW). Person 1 enters the model as NW at the age 2 y and stays NW until the age 13 y, when she is censored (lost to follow-up). Person 2 enters the model as NW at the age of 4 y and stays NW until the age of 10, when she is censored. Person 3 enters the model as NW at the age of 6 y and stays NW until the age of 11, when she becomes OW (has an event), = event, = censoring.

Inline graphic — Schematic of 3 hypothetical persons in survival analysis 1 (from NW to OW). Person 1 enters the model as NW at the age 2 y and stays NW until the age 13 y, when she is censored (lost to follow-up). Person 2 enters the model as NW at the age of 4 y and stays NW until the age of 10, when she is censored. Person 3 enters the model as NW at the age of 6 y and stays NW until the age of 11, when she becomes OW (has an event), = event, = censoring.