Table 3.
Diagnostic Test Evaluation of the Child Behavior Checklist (CBCL) Sleep Composite Subscale Scores using Various Cut-Off Scores to Identify Children with ‘Clinically Significant’ Sleep Difficulties as Measured by the Sleep Disorders Scale for Children (SDSC) (N = 215).
| Statistic | Description | CBCL Sleep Composite Subscale ‘Cut-Off’ Score |
|||
|---|---|---|---|---|---|
| 2 | 3 | 4 | 5 | ||
| Sensitivity (95% CI) | Probability that the CBCL Sleep Composite subscale score will identify a child ‘at-risk’ of sleep difficulties when they are in the ‘clinically significant’ range on the SDSC. | 95.13 (89.03%–98.41%) | 92.23% (85.27%–96.59%) | 87.38% (79.38%–93.11%) | 67.96% (58.04%–76.825) |
| Specificity (95% CI) | Probability that the CBCL Sleep Composite subscale score will identify a child ‘not at-risk’ of sleep difficulties when they are in the ‘not clinically significant’ range on the SDSC. | 33.04% (24.44%–42.56%) | 49.11% (39.54%–58.73%) | 66.96% (57.44%–75.56%) | 81.25% (72.78%–88.00%) |
| Positive Predictive Value Sensitivity (95% CI) | Probability that the child is in the ‘clinically significant’ range on the SDSC when the CBCL Sleep Composite subscale identifies them as ‘at-risk’. | 56.65% (53.25%–59.98%) | 62.50% (57.94%–66.85%) | 70.87% (64.91%–76.18%) | 76.92% (68.92%–83.36%) |
| Negative Predictive Value (95% CI) | Probability that the child is in the ‘not clinically significant’ range on the SDSC when the CBCL Sleep Composite subscale identifies them as ‘not at-risk’. | 88.10% (75.15%–94.77%) | 87.30% (77.49%–93.21%) | 85.23% (77.35%–90.70%) | 73.39% (67.25%–78.74%) |
| Accuracy (95% CI) | Overall probability that the CBCL Sleep Composite subscale will correctly classify the child according to the SDSC categories. | 62.79% (55.96%–69.27%) | 69.77% (63.15%–75.83%) | 76.74% (70.52%–82.22%) | 74.88% (68.53%–80.53%) |
| Diagnostic Odds Ratio | The positive likelihood ratio divided by the negative likelihood ratio. Values exceeding 10.00 indicate test suitability. | 9.47 | 11.31 | 13.89 | 9.28 |
| True Positive N | Children ‘at-risk’ on the SDSC Sleep Composite subscale who are also in the ‘clinically significant’ range on the SDSC. | 98 | 95 | 90 | 70 |
| True Negative N | Children ‘not at-risk’ on the SDSC Sleep Composite subscale who are also in the ‘not clinically significant’ range on the SDSC | 37 | 55 | 75 | 91 |
| False Positive N | Children ‘at-risk’ on the SDSC Sleep Composite subscale who are in the ‘not clinically significant’ range on the SDSC | 75 | 57 | 37 | 21 |
| False Negative N | Children ‘not at-risk’ on the SDSC Sleep Composite subscale who are actually in the ‘clinically significant’ range on the SDSC | 5 | 8 | 13 | 33 |