---
title: Right censored data
description: "Censored data (see [entry](https://www.psyctc.org/psyctc/glossary2/censored-data/)) is data where at least some values are not know accurately but are known to be bigger than a given value, less than a given value, or between two values. Right censored data is the second…"
url: "https://www.psyctc.org/psyctc/glossary2/right-censored-data/"
updated: "2024-12-15"
category: All OM book glossary entries
---

# Right censored data

Censored data (see [entry](https://www.psyctc.org/psyctc/glossary2/censored-data/)) is data where at least some values are not know accurately but are known to be bigger than a given value, less than a given value, or between two values. Right censored data is the second of those: data where at least some values are known to be above a value but not (yet) known precisely. This typically happens in follow-up or counting data. The data may be how many sessions clients attend but, if some therapies are ongoing at the time this the data is updated, some values are only known to be going to be greater than or equal to the number of sessions attended to that date: right censored.

#### Details

This matters because if we ignore the censoring we have introduced a bias into our estimation of general durations of therapies for that study. However, there are statistical methods that handle censoring and will avoid that bias (given some sensible assumptions mostly that the pattern of duration hasn't actually changed across the period of the study). See survival analysis for probably the biggest class of such methods.

#### Try also

[Censored data](https://www.psyctc.org/psyctc/glossary2/censored-data/)
[Frailty analysis](https://www.psyctc.org/psyctc/glossary2/frailty-analysis-models/)
[Interval censoring](https://www.psyctc.org/psyctc/glossary2/interval-censored-data/)
[Left censoring](https://www.psyctc.org/psyctc/glossary2/left-censored-data/)
[Survival analysis](https://www.psyctc.org/psyctc/glossary2/survival-analysis/)
[Type I censoring](https://www.psyctc.org/psyctc/glossary2/type-i-censoring/)
[Type II censoring](https://www.psyctc.org/psyctc/glossary2/type-ii-censored-data/)

#### Chapters

Not covered in the OMbook.

#### Online resources

None forseeable.

#### Dates

First created 9.xii.24, links updated 15.xii.24.