RESULTS
Polysomnographic sleep findings of patients were analyzed for the
distribution of sleep stages and other sleep related data.Sleep stages were classified as W (wake), N1 (non-rem1), N2 (non-rem2),
N3 (non-rem3) and R (rem). Total recording time, total sleep time, sleep
efficiency and the duration of each sleeping stage (W, N1, N2, N3,R)
were calculated from the PSG reports (Table 1).
The BIS analysis was performed according to different SQI values.
Initially SQI values were divided into three groups (Group 1: 50-70,
Group 2: 70-89, Group 3: >90) to calculate BIS averages for
each group. When the mean BIS values of these three SQI groups were
compared, no significant difference was found between Group 2 and Group
3 as a result of binary comparison of BIS values. There was
statistically significant difference between Group 1 and the other
groups (Table 2). So we included only the BIS values with an index of
SQI over 70 for comparison of BIS values of sleep stages (Table 3).
When the sleep stages were compared, no statistically significant
difference was found between the BIS score averages (for SQI values over
70) in stage 2 and REM stages. In all of the other comparisons, there
was significant difference in BIS values between the sleep stages (Table
4)