Page Last Updated: June 2, 2026

Version: BR21.1🔗

Release Date: 2026-04-28

Participants

3,605

Total Visits

8,415

V01: 3,545 | V02: 2,310
V03: 1,398 | V04: 679 | V05: 483

By Sex

V02 onwards visit done:
1,159 (F) | 1,271 (M)

V01 Only: 1,175 (Unknown)

BR21.1 Resolved Issues & Updates (Provisional)🔗

NOTE: Items Are Provisional

These items will remain listed as ACTIVE issues and pending updates until final Workgroup/SME confirmation that the resolution has been successfully implemented (also see Resolved Issues & Updates Archive for a running record of confirmed resolved items starting at BR21.0).

= Completed Pending Update (Provisional) = Resolved Known Issue (Provisional)

Domain	Table/Topic	Summary
MH	ERICA	Remove date taken, age, and language fields (computed based on date coded) to exclude from patch 2.1 [BR data only].
BIO	Nails	Add unit (mg) for `nails_results_nail_weight` variable.
BIO	Urine	Add creatinine results (`bio_creat_u`).
Demo	SU Flags	A derived/rolled up substance use flag for Stimulants will be added based on positive instrument-specific Stimulant results.
Demo	Visit Info	SU flags will include Nail toxicology results in addition to Urine.
EEG	MADE	N=3 V04 session derivatives are missing corresponding tabulated data for FACE/MMN tasks
MRI	Summary Forms	Add MRI Scan Session + Data Summary Forms (information from the MRI technician obtained on day of scan).
NCL	Bayley-4	Add item-level scores.
PH	Growth	Remove `ph_ch_anthro_002`.
PH	Growth	Add age-based z-scores to `ph_ch_anthro` (see Z-Scores Excluded).
PEX	TLFB	PNR data were incorrectly reported using TLFB versions 1/2 and will be updated to version 3 specific to PNR.
SED	C-PACEs	Summary scores are inaccurate; until corrected, users can compute scores following the provided scoring documentation.
	Demo	Remove descriptive fields (e.g. `roster_001__00`) [BR data only].
	Demo	Add V01 household income (`income_002`) (adult table).
	Demo	Add variables on Other Biological Parent (adult table).
	Demo	Add `work_{002–004}_post` (worked for pay/≥20/≥35 hours while pregnant) and `work_004__01` (job held ≥1 month since V01) (adult table).