Table 3.
Comorbidities Associated with Sleep Duration. (A) Reports in the Medical History of Attention Deficit Disorder, Depressive Disorder, and Obsessive Compulsive Disorder were All Independently Associated with Shorter Current Sleep Duration. The Threshold for Significance was Set at a Bonferroni-Corrected P-Value < 6.0 × 10−3. (B) for Associated Comorbidities, Mean Sleep Duration was Compared between Children with the Reported Comorbidity to Those without
| Comorbidity | βa (95% CI) | P-value | R2 | ||
|---|---|---|---|---|---|
| A | |||||
| Anxiety Disorder (n = 96/2,540) | −10.15 (−25.72, 5.42) | 2.0 × 10−1 | 0.0006 | ||
| Attention Deficit Disorder (n = 361/2,556) | −18.43 (−26.94, −9.92) | <1.0 × 10−4 | 0.0070 | ||
| Bipolar Disorder (n = 13/2,549) | −30.22 (−73.50, 13.05) | 1.7 × 10−1 | 0.0007 | ||
| Constipation (n = 727/2,702) | −3.57 (−10.06, 2.93) | 2.8 × 10−1 | 0.0004 | ||
| Depressive Disorder (n = 21/2,522) | −65.68 (−98.41, −32.94) | <1.0 × 10−4 | 0.0061 | ||
| Irritable Bowel Disorder (n = 20/2,709) | −5.62 (−39.23, 27.99) | 7.3 × 10−1 | 0.0000 | ||
| Migraines (n = 37/2,524) | −25.91 (−50.73, −1.08) | 4.1 × 10−2 | 0.0017 | ||
| Obsessive Compulsive Disorder (n = 85/2,552) | −25.76 (−42.27, −9.22) | 2.0 × 10−3 | 0.0036 | ||
| Seizures (n = 133/2,556) | −4.65 (−17.93, 8.64) | 4.9 × 10−1 | 0.0002 | ||
| Comorbidity | Mean SD w/Comorbidity |
Mean SD w/o Comorbidity |
t (df) | d (95% CI) | P-value |
| B | |||||
| Attention Deficit Disorder | 538.84+/−76.87 | 557.27+/−76.35 | 4.23 (2554) | 0.86 (0.43, 1.29) | <1.0 × 10−5 |
| Depressive Disorder | 490.00+/−97.37 | 555.68+/−75.99 | 3.08 (20.23W) | 0.24 (0.13, 0.35) | 2.9 × 10−3 |
| Obsessive Compulsive Disorder | 529.83+/−86.15 | 555.69+/−76.05 | 2.72 (88.68W) | 0.34 (0.12, 0.55) | 3.9 × 10−2 |
n = the number of children reported to have the comorbidity/the total number of children with these data available.
β-coefficients represent the number of minutes sleep duration decreases given that the parent reported presence of the comorbidity in the proband; WIndicates the use of Welch’s approximation as the variance of sleep duration was unequal between the comparison groups.
SD, sleep duration; df, degrees of freedom.