A randomised double-blind placebo-controlled cancer prevention trial with an estimated duration of 5 years and with 52,000 subjects recruited from the general populations of the UK, Denmark, Sweden, Finland and the United States

ISRCTN	ISRCTN64336220
DOI	https://doi.org/10.1186/ISRCTN64336220
Secondary identifying numbers	PRECISE

Prospectively registered

Protocol

Statistical analysis plan

Results

Individual participant data

Record updated in last year

Plain English summary of protocol

Not provided at time of registration

Dr - -
Scientific

UKCCCR Register Co-ordinator
MRC Clinical Trials Unit
222 Euston Road
London
NW1 2DA
United Kingdom

Study design	Randomised double-blind placebo-controlled
Primary study design	Interventional
Secondary study design	Randomised controlled trial
Study setting(s)	Not specified
Study type	Not Specified
Scientific title
Study objectives	Not provided at time of registration Added as of 27/03/2009: Please note that this trial never started due to lack of funding.
Ethics approval(s)	Not provided at time of registration
Health condition(s) or problem(s) studied	Multiple cancer sites
Intervention	Four treatment groups: 1. Placebo 2. 100 micrograms selenium/day 3. 200 micrograms selenium/day 4. 300 micrograms selenium/day
Intervention type	Other
Primary outcome measure	Not provided at time of registration
Secondary outcome measures	Not provided at time of registration
Overall study start date	01/01/1995
Completion date	29/06/2001
Reason abandoned (if study stopped)	Lack of funding/sponsorship

Participant type(s)	Patient
Age group	Adult
Sex	Both
Target number of participants	52,000
Key inclusion criteria	All those aged between 60 and 74 years are eligible.
Key exclusion criteria	1. Southwest Oncology Group (SWOG) performance status score of greater then 1 or equivalent 2. Active liver or kidney disease 3. Prior diagnosis of cancer 4. Diagnosed Human Immunodeficiency Virus (HIV) infection 5. Disminished mental capacity 6. Taking 50 micrograms/day or more of selenium supplements
Date of first enrolment	01/01/1995
Date of final enrolment	29/06/2001

UKCCCR Register Co-ordinator

London
NW1 2DA
United Kingdom

Cancer Research UK (CRUK) (UK)
Charity

PO Box 123
Lincoln's Inn Fields
London
WC2A 3PX
United Kingdom

Charity

Cancer Research UK (UK)
Private sector organisation / Other non-profit organizations

Intention to publish date
Individual participant data (IPD) Intention to share	No
IPD sharing plan summary	Not provided at time of registration
Publication and dissemination plan	Not provided at time of registration
IPD sharing plan