. Author manuscript; available in PMC: 2022 Sep 1.

Published in final edited form as: Clin J Sport Med. 2021 Sep 1;31(5):e221–e228. doi: 10.1097/JSM.0000000000000943

Table 6:

Reliable change equations for child HBI symptom ratings

Cognitive scale
Post-acute z score = (Post-acute cognitive score − (4.965 + (0.310 × Retrospective pre-injury cognitive score)))/6.541
1 month z score = (1 month cognitive score − (2.883 + (0.519 × Retrospective pre-injury cognitive score)))/5.933
3 month z score = (3 month cognitive score − (3.819 + (0.426 × Retrospective pre-injury cognitive score)))/6.620
Post-injury z score = (Post-injury cognitive score − (4.163 + (0.401 × Retrospective pre-injury cognitive score)))/6.424
Somatic scale
Post-acute z score = (Post-acute somatic score − (3.062 + (0.399 × Retrospective pre-injury somatic score)))/4.292
1 month z score = (1 month somatic score − (2.526 + (0.515 × Retrospective pre-injury somatic score)))/4.267
3 month z score = (3 month somatic score − (2.778 + (0.491 × Retrospective pre-injury somatic score)))/4.402
Post-injury z score = (Post-injury cognitive score – 2.963 + (0.423 × Retrospective pre-injury cognitive score)))/4.324