... wereevaluated for inclusion by looking for information on the following issues in relation to GAF: guidelines,instructions, process of rating, methodology, psycho-metrics (studies with information ... for scoring GAF [22]; for example, theymay use the average of the functioning and symptomscores (for the single-scale GAF, only one value isrecorded), the least severe of symptoms, or the highestarea ... scores for longer periods [65]. Depres-sioncanbescoredby,forexample:depressioninthepast year for 2 w eeks or more, for much of the time in the past year, or for most of the days over a 2-year...