| PSYBOBA | PSC | SDQ | Significance+ |
---|---|---|---|---|
 | n = 796 | n = 815 | n = 814 |  |
Response rate | 84% | 84% | 87% | ** |
Mean n unanswered items†| 0.06 | 0.18 | 0.05 | *** |
parents rating: not too long (vs. (too) long) | 88% | 80% | 81% | **** |
parents rating: (very) easy (vs. (very) difficult, not difficult/not easy) | 69% | 59% | 66% | * |
Parents having critical remarks | 9% | 20% | 10% | *** |