Table 3.
Ages at Which Tetrachoric Correlations Between Specific Problems Exceeded 0.40
| Sleep Problem | Nightmares | Talks/Walks | Wets Bed | Sleeps Less | Sleeps More | Trouble Sleeping |
|---|---|---|---|---|---|---|
| Nightmares | ||||||
| Talks/Walks | 5, 7, 9–12, 14, 16 | |||||
| Wets Bed | — | 13 | ||||
| Sleeps Less | 14 | — | — | |||
| Sleeps More | 16 | — | 16 | — | ||
| Trouble Sleeping | 5, 7, 9, 11, 12, 15, 16 | 5 | 16 | 4, 5, 7, 9–16 | 14 | |
| Overtired | 5, 11, 13–16 | — | — | 5, 10, 12, 14–16 | 5, 9, 10, 12–16 | 5, 7, 9, 12–16 |
Note. Maximum likelihood estimates from Mplus, including missing data. — indicates no correlations > 0.40 at any age.