The state/trait anxiety level was measured by using the
Persian version of the Spielberger’s State-Trait Anxiety
Inventory (STAI). The STAI scale consists of 40 statements
describing various emotional states, which have been translated
into Persian, and its reliability and validity are
acceptable.29 Twenty of these statements require the subjects
to describe their emotional reactions in terms of
anxiety at a particular moment or period in time (state
anxiety).