How to complete the saliva sample and “scratch and sniff” smell identification test
If you are participating in the study for the first time you will receive:
How to complete the saliva sample
This is labelled "GeneFix” and is a self-collection kit that provides all you need along with the following instructions for collecting and stabilizing your saliva specimen. (Please note: if you have a collection kit which is labelled "Oragene - DNA", you can find an instruction video here)
Before giving the sample please:
Do not eat, drink, smoke, chew gum or brush your teeth for 30 minutes before giving your saliva sample.
Do not tip out the fluid in the tube. Please check that the fluid level is at 2ml. This is the stabilising fluid and is essential for preserving your sample.
You can watch a short demonstration film here about how to give the sample:
Most people take between 2 and 5 minutes to deliver a saliva sample following steps 1 to 5.
You can read the instructions here:
Please put the plastic specimen bag with your specimen inside the yellow padded envelope.
How to complete the “Scratch and Sniff” Smell Identification Test
There are four separate booklets that you will find in the white envelope titled “The Smell Identification Test” along with a pencil. Each booklet contains ten separate tests that you can use the pencil to lightly scratch and follow these instructions:
In the post you will receive an envelope containing:
Please put both the completed saliva sample and four booklets in the yellow envelope, seal and post. If this is not your first year in the study we will only send you the smell kits as we only need one saliva sample. In some participants who we think may have difficulty completing the smell test we will send you the saliva collection kit only in the first year. This envelope is Pre-paid and is labelled:
FREEPOST UNIVERSITY COLLEGE LONDON