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. 2013 Dec 18;8(12):e84911. doi: 10.1371/journal.pone.0084911

Table 1. The effects of exam period on measures of somatic symptoms and stress: Descriptive results.

Pre-baseline Exam period Post-baseline
n=141 n=123 n=118
Mean±SD
Primary variable:
SOMS-7d 11.1±8.9 18.2±14.5 9.7±9.0
Control variables:
PSQ-20 33.6±17.5 54.0±19.3 29.8±18.3
BDI-II 6.6±6.4 11.5±7.0 5.2±5.4
STAI-G-X1 state 36.9±8.1 42.74±12.3 37.1±10.3
Side aim: Temporal stability of the TAS-20
TAS-20 45.3±9.7 45.9±10.1 44.6±10.2

Abbreviations: BDI-II: Beck’s Depression Inventory; PSQ-20: Perceived Stress Questionnaire; SOMS-7d: Screening for Somatoform Symptoms 7-day version; STAI-G-X1 state: State-Trait Anxiety Inventory – State Form; TAS-20: Toronto Alexithymia Scale 20-item version.