0520 Treating Sleep Maintenance Insomnia Means Treating Depression?

Abstract Introduction Rumination whilst awakening nightly might be a common symptom in fragmented sleep and depression as well. The problem is that the test results on BECK or MMPI DEPRESSION SCALE often do not reach the diagnostic criteria of depression on DSM-V, only the symptoms of worry, rumination and sleep maintenance problems appear as mild depressive signs. The aim of our study was to investigate the assumption to which treating everyday worries through CBT methods would affect the amount and severity of nightly rumination and the severity of depressive mood as well. Methods 33 adult patients (M=39,55 SD=10,66) diagnosed with insomnia with the criteria of only sleep maintenance proble. Each participants filled the PSQI, the Epworth Sleepiness Scale, the Beck Depression Inventory and the Trait-Anxiety Inventory before the beginning of the CBT therapy session and 10 sessions later. Results Our results show a significant effect of the CBT therapy to sleep maintenance symptoms through treating everyday ruminations opposite to treating only nightly ruminations on sleeping quality (F(1, 31)= 55,358 p<0,01 η2 = 0,641). The significant improvement in sleep quality only were shown in the subgroup of everyday rumination CBT group (N=17, M=7,88 SD=2,57), but not in the subgroup of nightly ruminations CBT group (N=16, M=9,87, SD=1,92). Conclusion Based on our preliminary findings, treating everyday worries with CBT therapy affect sleep maintenance insomnia, while treating only nightly ruminations and worries of sleeping difficulties would not improve sleeping problems and depressive mood. Support No