# \[ANN\] SeqBounds.jl - group sequential design bounds

**URL:** https://discourse.julialang.org/t/ann-seqbounds-jl-group-sequential-design-bounds/70660
**Category:** Package Announcements
**Tags:** package, announcement, statistics
**Created:** [October 30, 2021, 12:54pm UTC](https://discourse.julialang.org/t/ann-seqbounds-jl-group-sequential-design-bounds/70660 "2021-10-30T12:54:51Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![PharmCat](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pharmcat/32/6953_2.png) [@PharmCat](https://discourse.julialang.org/u/PharmCat)
#### Post date: [October 30, 2021, 12:54pm UTC](https://discourse.julialang.org/t/ann-seqbounds-jl-group-sequential-design-bounds/70660/1 "2021-10-30T12:54:51Z")

</div>

[SeqBounds.jl](https://github.com/PharmCat/SeqBounds.jl) - group sequential design bounds calculation for interim analysis - the alpha spending function approach.

Reference:

- [Reboussin, D. M., DeMets, D. L., Kim, K., & Lan, K. K. G. (2000). _Computations for Group Sequential Boundaries Using the Lan-DeMets Spending Function Method. Controlled Clinical Trials, 21(3), 190–207._ doi:10.1016/s0197-2456(00)00057-x](https://pubmed.ncbi.nlm.nih.gov/10822118/)

- [DeMets DL, Lan KK. Interim analysis: the alpha spending function approach. Stat Med. 1994 Jul 15-30;13(13-14):1341-52; discussion 1353-6. doi: 10.1002/sim.4780131308. PMID: 7973215.](https://pubmed.ncbi.nlm.nih.gov/7973215/)

See also: [ldbounds](https://github.com/cran/ldbounds) for R.