Table 2.
Means and standard deviations for sleep measurements by group
| Measures | ADHD N = 26 | Control N = 49 | F |
|---|---|---|---|
| Polysomnography |
|
|
|
| Sleep latency |
27.48 (17.99) |
20.57 (16.24) |
1.32 |
| Total sleep time |
519.20 (43.25) |
518.84 (61.10) |
0.09 |
| Sleep efficiency (%) |
94.91 (3.89) |
96.90 (2.84) |
3.62 |
| Stage N1 (min) |
27.50 (12.62) |
22.55 (11.00) |
1.47 |
| Stage N2 (min) |
204.36 (48.45) |
185.17 (50.00) |
1.29 |
| Stage N3 (min) |
201.73 (50.06) |
224.01 (61.37) |
1.82 |
| REM Sleep (min) |
85.61 (21.12) |
87.11 (23.03) |
0.47 |
| PLM index |
2.87 (1.82) |
3.78 (1.24) |
0.79 |
| AHI Index |
0.84 (0.97) |
1.15 (0.61) |
0.51 |
| Sleep Logs |
|
|
|
| Bedtime |
21:13 (0:36) |
21:14 (0:45) |
0.30 |
| Wake-up time |
7:16 (0:45) |
7:20 (0:53) |
0.05 |
| Sleep Duration |
10:03 |
10:06 |
-- |
| Morningness-Eveningness Scale |
29.81 (4.56) |
31.80 (3.32) |
10.72* |
| Children’s Sleep Habits Questionnaire |
|
|
|
| Bedtime Resistance |
8.23 (2.60) |
7.58 (2.43) |
1.81 |
| Sleep Onset Delay |
1.71 (0.82) |
1.42 (0.64) |
3.98* |
| Sleep Duration |
5.16 (1.93) |
4.34 (1.45) |
5.88* |
| Sleep Anxiety |
6.10 (2.29) |
5.23 (2.21) |
4.06* |
| Night Wakings |
4.58 (2.0) |
3.73 (1.15) |
6.88** |
| Parasomnias |
9.06 (1.77) |
8.27 (1.84) |
3.57 |
| Sleep Disordered Breathing |
3.45 (0.93) |
3.19 (0.90) |
1.45 |
| Daytime Sleepiness |
13.71 (3.50) |
11.81 (2.85) |
8.07** |
| Total Sleep Disturbance Score | 48.97 (5.82) | 42.97 (7.16) | 17.36** |
Note. RLS refers to the Restless Leg Syndrome Index of the Pediatric Sleep Questionnaire; AHI refers to the apnea/hypopnea index. Children with primary sleep disorders were excluded from the study. *p ≤ .05. **p ≤ .001.