Table 6

Mean differences with 95% confidence intervals (CI) of sleep stages, mean and nadir oxygen saturation between T6 and baseline, T12 and T6, T12+ and T12–

Difference T6 − baselineDifference T12 − T6Difference T12+ − T12−
Mean (95% CI)WilcoxonMean (95% CI)WilcoxonMean (95% CI)Wilcoxon
Mean Sao 2-NREM (%)  9.3 (5.6 to 13.1) 6-165  5.3 (3.1 to 7.4) 6-165  3.9 (2.4 to 5.3) 6-165
Mean Sao 2-REM (%)  8.8 (5.1 to 12.6) 6-165  5.3 (3.0 to 7.6) 6-165  3.3 (1.8 to 4.7) 6-165
Nadir Sao 2-NREM (%)  8.9 (3.5 to 14.3) 6-165  9.7 (5.0 to 14.3) 6-160  6.7 (4.0 to 9.5) 6-165
Nadir Sao 2-REM (%) 10.9 (5.7 to 16.1) 6-165  9.3 (5.8 to 12.7) 6-165  9.3 (4.8 to 13.7) 6-160
Awakenings (1/h)−10.0 (−15.1 to −4.9) 6-165 6-159  −7.1 (−14.4 to 0.2) 6-160 6-159  −6.3 (−10.7 to −1.8) 6-160 6-159
TST (min) 38.0 (22.1 to 53.9) 6-165 10.2 (−10.9 to 31.6)NS 15.9 (7.6 to 24.3) 6-160
SL (min)  1.1 (−7.3 to 9.6)NS  5.5 (−1.2 to 12.1)NS −9.3 (−17.9 to −1.0) 6-150
SE (%)  9.4 (5.0 to 13.7) 6-160  0.1 (−5.7 to 5.9)NS  7.8 (4.6 to 11.0) 6-165
REM (% TST)  3.3 (−0.1 to 6.7)6-150 6-159  1.9 (−0.1 to 3.9)NS  3.9 (2.0 to 5.8) 6-160 6-159
REM-L (min)−22.3 (−59.6 to 15.0)NS  5.1 (−8.4 to 18.6)NS −4.6 (−19.8 to 10.6)NS6-159
NREM 1 & 2 (% TST)  −5.2 (−10.8 to 0.3) 6-150  −7.1 (−11.3 to −2.8) 6-165  −6.9 (−10.9 to −2.8) 6-165 6-159
NREM 3 & 4 (% TST)  2.2 (−2.0 to 6.4)NS  5.4 (1.1 to 9.7) 6-160  2.6 (−0.7 to 6.0)NS
  • NS = not significant;

  • 6-150 p<0.05;

  • 6-160 p<0.01;

  • 6-165 p<0.001;

  • 6-159 null hypothesis of normality rejected on a level of 0.10.

  • For definition of abbreviations see table 5.