Table 2.
Polysomnographic Sleep Statistics
| ADHD n = 7 | Controls n = 14 | p | |
|---|---|---|---|
| Total Dark Time (min.) | 590 ± 15 | 602 ± 9 | .025 |
| Sleep Period Time (min.) | 563 ± 11 | 579 ± 19 | .051 |
| Total Sleep Time (min.) | 541 ± 21 | 561 ± 23 | .064 |
| Sleep Efficiency (%) | 96.0 ± 3.0 | 96.8 ± 1.7 | .44 |
| Latency to Sleep Onset (min.) | 18 ± 15 | 17 ± 10 | .76 |
| Latency to REM Sleep (min.) | 144 ± 64 | 124 ± 55 | .48 |
| Wake After Sleep Onset (min.) | 16 ± 16 | 10 ± 9 | .28 |
| Wake After Final Awakening (min.) | 8 ± 17 | 6 ± 16 | .76 |
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| Wake (min.) | 42 ± 28 | 32 ± 18 | .33 |
| NREM Stage 1 (min.) | 35 ± 19 | 30 ± 9 | .38 |
| NREM Stage 2 (min.) | 205 ± 29 | 222 ± 41 | .36 |
| NREM Stage 3 (min.) | 74 ± 28 | 66 ± 22 | .56 |
| NREM Stage 4 (min.) | 125 ± 21 | 124 ± 30 | .95 |
| REM Sleep (min.) | 108 ± 22 | 119 ± 18 | .069 |
| Slow Wave Sleep (min.) | 199 ± 41 | 190 ± 40 | .66 |
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| Wake (% TST) | 9.0 ± 5.7 | 5.9 ± 3.6 | .31 |
| NREM Stage 1 (% TST) | 6.5 ± 3.5 | 5.3 ± 1.5 | .28 |
| NREM Stage 2 (% TST) | 38.1 ± 6.4 | 39.5 ± 6.9 | .65 |
| NREM Stage 3 (% TST) | 13.5 ± 6.8 | 11.7 ± 3.6 | .43 |
| NREM Stage 4 (% TST) | 23.2 ± 4.3 | 22.3 ± 5.9 | .72 |
| REM Sleep (% TST) | 17.3 ± 3.7 | 19.8 ± 2.9 | .10 |
| Slow Wave Sleep (% TST) | 36.7 ± 7.0 | 34.0 ± 7.3 | .43 |
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| Stage 2 EEG Spectral Power | |||
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| Slow Wave Activity (% μV2) | .57 ± .058 | .57 ± .031 | .99 |
| Slow Sleep Spindle Activity (% μV2) | .024 ± .012 | .037 ± .011 | .023 |
| Fast Sleep Spindle Activity (% μV2) | .0059 ± .0014 | .011 ± .0062 | .049 |
Note: Data reported as mean ± sd. Definitions: Time in Bed: elapsed time from lights out to lights on. Sleep Period Time (SPT): elapsed time from sleep onset to final awakening. Total sleep time (TST): total time scored sleep within SPT. Sleep Efficiency: (TST/SPT)*100. Slow Wave Sleep: Stages 3+4 collapsed. Significance from 2-tailed independent-samples t-tests.