The instructions for using the faecal occult blood test (FOBt) kit

People are sent a faecal occult blood test (FOBt) kit 1 week after the letter inviting them to take part in screening. The kit comes with full instructions, cardboard sticks with which to collect the stool samples and a freepost envelope in which to return the kit for analysis at the programme hub laboratory (see The NHS bowel screening pilot and the programme since then).

Andrea Giles, specialist screening practitioner, talks about the Faecal Occult Blood test.

Age at interview 49

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Several people told us about their experiences of taking part in screening:

  • 6 tiny samples from 3 separate bowel motions are collected (2 from each bowel movement)
  • Bowel motions must be caught before they reach the water or touch the toilet bowl
  • There are 3 flaps on the test kit, each with 2 ‘windows’ underneath. Samples are smeared onto the test kit windows (these used to be small circles but are now small rectangles) with the cardboard sticks provided
  • The kit must be returned to the hub for testing within 14 days of the first sample being taken.

Shows the type of test card he used and explains that you must not open the back of it.

Age at interview 63

Gender Male

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He smeared two samples of a stool onto the test card on three different occasions.

Age at interview 65

Gender Male

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Explains that if you had frequent bowel motions you could do the test on three different…

Age at interview 59

Gender Male

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Missing a day did not matter as long as stool samples were taken on three different occasions.

Age at interview 65

Gender Male

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Almost all the people we talked to found the instructions that came with the test kit very clear, saying they were “very precise” or “told you exactly what to do”. One man said they were “spot-on” and that he could not fault them in any way.

The Faecal Occult Blood test (FOBt) kit instructions were very clear.

Age at interview 58

Gender Female

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A few people thought the instructions were a little “ambiguous” or could be “misunderstood”. Some were not sure how much of their stool (poo/faeces) they had to smear onto the small windows on the card. One man thought that it might be easier if the windows (the small circles or rectangles) were a bit deeper.

One woman wrongly thought she had to use samples from alternate days, and another woman thought she had to use samples on consecutive days (see Why some were reluctant or did not take part). In fact, samples can be taken at any time within 14 days, as long as 3 different stools are used.

She wrongly thought the samples from her bowel motion had to be put on the card on alternate days.

Age at interview 70

Gender Female

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One woman felt confused when she opened the test kit but when she looked at the instructions everything became clear.

Suggests that you read the instructions before opening the test kit.

Age at interview 70

Gender Female

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During the first part of the pilot programme people were asked to exclude certain foods from their diet while they were collecting their stool samples. One woman, for example, was asked to repeat the test taking care to exclude red meat and certain vegetables.

She took part in the pilot programme. It required some dietary restrictions because it was…

Age at interview 70

Gender Female

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Diet does not affect the test and the current NHS bowel cancer screening programme requires no dietary restrictions.