Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

Samples collected

At baseline a 10 mL non-fasting blood sample was collected from each participant and the time since last meal was recorded. The samples were maintained at 0-4°C and shipped to the local study laboratory for aliquotting into three plasma cryovials and one DNA-containing buffy coat cryovial. They were then stored in a -40°C freezer for three to four months before being couriered on dry ice to the central blood repository in Beijing for storage at -80°C or liquid nitrogen tanks. Two of the frozen plasma aliquots from each participant were couriered to Oxford and stored in liquid nitrogen tanks.

Repeat blood samples and other biological samples (e.g. urine, saliva and faecal) from participants, were collected during subsequent resurveys.

Various blood tests were conducted at each survey, either on-site using blood spot tests e.g. blood glucose, hepatitis B surface antigen (HBsAg) or at local laboratory using desktop analysers e.g. lipid-related biomarkers.

CKBsamplesScanned3-Lab_byTim_crop.jpg