# ODK for longitudinal RCT w/ multiple visits

**URL:** <https://forum.getodk.org/t/odk-for-longitudinal-rct-w-multiple-visits/35128>\
**Category:** Support\
**Created:** [September 22, 2021, 6:35am UTC](https://forum.getodk.org/t/odk-for-longitudinal-rct-w-multiple-visits/35128 "2021-09-22T06:35:54Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![danbjoseph](https://getodk.b-cdn.net/user_avatar/forum.getodk.org/danbjoseph/32/21901_2.png) [@danbjoseph](https://forum.getodk.org/u/danbjoseph)\
**Post date:** [September 27, 2021, 4:49pm UTC](https://forum.getodk.org/t/odk-for-longitudinal-rct-w-multiple-visits/35128/2 "2021-09-27T16:49:22Z")

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There are several posts on the forum that discuss randomization. Have you seen these and do they help?

- [Randomization of questions](https://forum.getodk.org/t/randomization-of-questions/13004/4)
- [Randomize order of questions](https://forum.getodk.org/t/randomize-order-of-questions/3294/10)
- [Randomly calling a question set](https://forum.getodk.org/t/randomly-calling-a-question-set/5503)

For follow-up, it would be possible to use an ID code to lookup some additional details that are pulled from a [form dataset](https://docs.getodk.org/form-datasets/#referencing-values-in-datasets) and used to confirm that the ID was entered correctly.

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