I-34567: Colorectal cancer survival and treatment sequencing Provisioned

Dr. Priya Raman, GI Oncology. IRB protocol IRB-2026-0301, approved 2026-10-14 through 2027-10-13.

Protocol scope and approvals Provisioned dataset

Provisioned: 260 patients in the approved cohort. Study identifiers are HMAC-SHA256 of the enterprise patient identifier under a per-study key held in the linkage service (kv://eci-research/linkage/I-34567 v1). The same patient receives a different, non-derivable identifier in every study. Dates are shifted per patient.

Researcher view (workspace research-I34567)

study_id	sex	birth_year	zip3	diagnosis	diagnosis_date (shifted)	age_at_dx
`S34567-5E5789C1`	M	1963	142	C18.2	2018-09-10	55
`S34567-AE7013BF`	F	1959	142	C18.7	2015-09-22	56
`S34567-8D754352`	F	1995	142	C18.9	2025-02-03	29
`S34567-365E746B`	M	1970	142	C18.7	2025-09-08	55
`S34567-4D5C1CB7`	F	1953	140	C18.9	2010-01-27	56
`S34567-140FC9B7`	F	1948	142	C18.9	2015-08-10	66
`S34567-C3AE8C90`	F	1953	142	C18.2	2019-04-13	65
`S34567-74A9C105`	M	1928	142	C18.9	2016-06-18	87
`S34567-6710A616`	F	1963	147	C18.9	2014-06-03	51
`S34567-FE14C4DB`	F	1962	142	C18.7	2018-04-04	55
`S34567-215FB412`	M	1951	142	C18.2	2023-02-17	71
`S34567-87779FD1`	M	1961	140	C18.7	2015-05-22	54
`S34567-965485A7`	M	1942	140	C18.9	2011-10-15	69
`S34567-649FCA81`	F	1950	140	C18.7	2011-12-02	61
`S34567-ED1E8A80`	F	1970	142	C18.7	2024-10-25	54
`S34567-B5FF4668`	F	1936	142	C18.7	2019-01-07	82

Showing 16 of 260. No names, MRNs, full dates of birth, full ZIP codes or enterprise identifiers are present.

Honest broker only: linkage crosswalk

enterprise_patient_id	study_id
`01c97c7d-9980...`	`S34567-5E5789C1`
`0251b52c-94b3...`	`S34567-AE7013BF`
`063e9646-925a...`	`S34567-8D754352`
`0679ee54-f50c...`	`S34567-365E746B`
`068c10cc-ed0e...`	`S34567-4D5C1CB7`
`06c0b648-2ae8...`	`S34567-140FC9B7`
`07f73ef7-025f...`	`S34567-C3AE8C90`
`08eeea50-ee3a...`	`S34567-74A9C105`
`099607f3-2e72...`	`S34567-6710A616`
`09c478ad-09b6...`	`S34567-FE14C4DB`
`0ac18884-654a...`	`S34567-215FB412`
`0b144811-55da...`	`S34567-87779FD1`
`0c150d5f-2412...`	`S34567-965485A7`
`0c4716e4-aba8...`	`S34567-649FCA81`
`0e91254a-7850...`	`S34567-ED1E8A80`
`113948b6-9707...`	`S34567-B5FF4668`

Stored separately in the linkage service, encrypted with a customer-managed key. Researchers have no access. Re-identification requires a documented, approved request; every lookup is logged.

Audit trail for I-34567

Time	Actor	Action	Detail
2026-11-02 23:39	J. Whitcomb	Provision	260 study identifiers generated (HMAC-SHA256, per-study key)