The K10 is a widely used, recommended measurement of psychological distress. It is a self report measure and designed for use in the general population.

The K10 has 5 possible responses for each question: all of the time, most of the time, some of the time, a little of the time and none of the time. They are scored from 5 through to 1.

The maximum score is 50 indicating severe distress, the minimum score is 10 indicating no distress.

The breakdown is as follows:

K10 ScoreLevel of psychological distress
30-50Very high

Kessler RC, Barker PR, Colpe LJ, Epstein JF, Gfroerer JC, Hiripi E, et al. Screening for serious mental illness in the general population. Arch Gen Psychiatry. 2003 Feb;60(2):184-9.