Respondents reporting an event in clusters where exactly one event had taken place during the reference period.

OR =  odds ratio (per year before the survey) for an event being reported (OR<1 means the event was less likely to be reported the greater the time it occurred before the survey).
n =  number of respondents correctly reporting the event.
N =  number of clusters with exactly one event of this type during the reference interval (x 2 respondents).
% =  % of potential reports included in responses.