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Table 4 Factors which could influence the patients' estimates of their sleep quality and/or alertness in the daytime. Only statistically significant (p < 0.05 or p < 0.01 marked by asterisks) correlation coefficients are displayed.

From: Subjective and objective evaluation of alertness and sleep quality in depressed patients

 

NIGHT RECORDING

DAY TIME RECORDING

 

Sleep latency

Sleep stage 1 (%)

Sleep stage 2 (%)

Sleep st.3+4 (%)

REM sleep (%)

Sleep efficacy

Total sleep time

Sleep stage 0–2 (visual an.)

Alpha amplitude (spectrum an.)

        

mean

trend

mean

trend

Age

   

-.46

       

Coffee (>2 cups/day)

           

Smoking (>10 cig./day)

           

Alcohol (>0.5 l wine or >0.1 l distilate/week)

 

.47

   

.46

     

Hypnotics (>3 times/week)

         

-.68*

 

Sedatives (>3 times/week)

           

Antidepressants (daily)

           

Unexpected event last week

     

-.54*

     

Too active going to bed

           

Disturbed by the examination

           

Beck: score for depression

           

Beck: score for anxiety

.54*

    

-.65*

   

.55*

-.65*