Baseline characteristics of participants recruited into the COLO-COHORT study: a UK-wide resource for colorectal cancer prevention.
To describe the design, recruitment, and baseline characteristics of the first phase of COLO-COHORT and to establish this population as a resource for colorectal cancer (CRC) prevention research.
COLO-COHORT is a prospective, multicentre observational study recruiting adults undergoing colonoscopy through screening and routine National Health Service referral pathways within a 32-site UK network. We present descriptive data from the first 4754 participants, recruited through 27 Phase 1 sites, including demographics, lifestyle factors, clinical characteristics, biospecimen availability and colonoscopy outcomes.
Participants had a median age of 64 years (IQR 57-70), and 54.3% were male. Overweight (38.0%) and obesity (30.5%) were common, and cardiometabolic comorbidities were prevalent (11.8% with type II diabetes; 39.4% with hypertension). Colorectal neoplasia was identified at colonoscopy in over half of participants (56.1%), with histologically characterised data available on polyp type, size, morphology and anatomical location. Core demographic and clinical variables were available for >95% of participants, with colonoscopy findings recorded for all. Linked blood and stool microbiome biospecimens were available for approximately 80% and 40% of participants, respectively.
This paper establishes and characterises COLO-COHORT's Phase 1 study cohort as a well-phenotyped resource, representing a population of individuals undergoing colonoscopy via UK screening and routine clinical pathways. This cohort will support and underpin future collaborative clinical, epidemiological and translational research in CRC prevention.
COLO-COHORT is a prospective, multicentre observational study recruiting adults undergoing colonoscopy through screening and routine National Health Service referral pathways within a 32-site UK network. We present descriptive data from the first 4754 participants, recruited through 27 Phase 1 sites, including demographics, lifestyle factors, clinical characteristics, biospecimen availability and colonoscopy outcomes.
Participants had a median age of 64 years (IQR 57-70), and 54.3% were male. Overweight (38.0%) and obesity (30.5%) were common, and cardiometabolic comorbidities were prevalent (11.8% with type II diabetes; 39.4% with hypertension). Colorectal neoplasia was identified at colonoscopy in over half of participants (56.1%), with histologically characterised data available on polyp type, size, morphology and anatomical location. Core demographic and clinical variables were available for >95% of participants, with colonoscopy findings recorded for all. Linked blood and stool microbiome biospecimens were available for approximately 80% and 40% of participants, respectively.
This paper establishes and characterises COLO-COHORT's Phase 1 study cohort as a well-phenotyped resource, representing a population of individuals undergoing colonoscopy via UK screening and routine clinical pathways. This cohort will support and underpin future collaborative clinical, epidemiological and translational research in CRC prevention.
Authors
Dunneram Dunneram, Hackney Hackney, Manning Manning, Louca Louca, Stewart Stewart, Taylor Taylor, Koo Koo, Young Young, Mitra Mitra, Hampton Hampton, Dobson Dobson, Neilson Neilson, Addison Addison, Whelpton Whelpton, , Sharp Sharp, Hull Hull, Rees Rees
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