1) Use this indicator only if:
i) you have reliable and up-to-date statistics on the number of children aged 6-59.99 months living in the area where your screening system operates
ii) the screening is done within a clearly defined period that does not overlap with other screening (i.e. there is a low risk of double counting)
iii) you trust the data provided by health volunteers who conduct screening (for example, your supervisors randomly visit houses to check whether children were screened by the volunteers)
Otherwise, you are likely to get unreliable data.
2) "Trained volunteer" means that the volunteer passed a knowledge and skills based performance test on measuring MUAC (i.e. is able to measure and record MUAC correctly).
3) This indicator relies on an accurate age assessment. Since people often do not remember the exact dates of their children’s birth, the data collectors should always verify the child’s age. This can be done by reviewing the child’s birth certificate, vaccination card or another document; however, since many caregivers do not have such documents (and since they can include mistakes), it is essential that your data collectors are able to verify the child’s age by using local events calendars. Read FAO’s Guidelines (see below) to learn how to prepare local events calendars and how to train data collectors in their correct use.