# \#precision

**URL:** https://discourse.datamethods.org/tag/precision/78.md

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## [Discussion of Assessing Heterogeneity of Treatment Effect, Estimating Patient-Specific Efficacy, and Studying Variation in Odds ratios, Risk Ratios, and Risk Differences](https://discourse.datamethods.org/t/discussion-of-assessing-heterogeneity-of-treatment-effect-estimating-patient-specific-efficacy-and-studying-variation-in-odds-ratios-risk-ratios-and-risk-differences/1513)

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**Author:** [@f2harrell](https://discourse.datamethods.org/u/f2harrell)\
**Replies:** 37\
**Last updated:** [August 23, 2026, 8:16pm UTC](https://discourse.datamethods.org/t/discussion-of-assessing-heterogeneity-of-treatment-effect-estimating-patient-specific-efficacy-and-studying-variation-in-odds-ratios-risk-ratios-and-risk-differences/1513 "2026-08-23T20:16:59Z")

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This is a place to discuss this blog article which shows an example of a formal assessment of heterogeneity of treatment effect, shows how to use penalized maximum likelihood estimation to get patient-specific efficacy e…

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## [Precision-based sample size calculation for one survival curve](https://discourse.datamethods.org/t/precision-based-sample-size-calculation-for-one-survival-curve/6153)

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**Author:** [@Eslam\_Maher](https://discourse.datamethods.org/u/Eslam_Maher)\
**Replies:** 3\
**Last updated:** [November 16, 2022, 6:34pm UTC](https://discourse.datamethods.org/t/precision-based-sample-size-calculation-for-one-survival-curve/6153 "2022-11-16T18:34:41Z")

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I am designing a cohort study whose main objective is estimation of the survival probability for the group. Many packages are available to estimate the sample size for a single mean or a single proportion based on the m…

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## [Precision as the goal for sample size estimation](https://discourse.datamethods.org/t/precision-as-the-goal-for-sample-size-estimation/511)

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**Author:** [@timdisher](https://discourse.datamethods.org/u/timdisher)\
**Replies:** 12\
**Last updated:** [January 28, 2019, 1:28pm UTC](https://discourse.datamethods.org/t/precision-as-the-goal-for-sample-size-estimation/511 "2019-01-28T13:28:28Z")

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I have seen arguments for estimating sample size based on precision as a goal pop up in a few different places. In BBR, @f2harrell provides the following summary of why this may be of interest: There are many reasons fo…