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. 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 4:

Parent HBI symptom rating normative data

Pre-injury Post-acute 1 Month 3 Month
Cognitive Somatic Cognitive Somatic Cognitive Somatic Cognitive Somatic
N 450 450 446 446 347 348 382 381
Mean 8.50 2.35 7.03 1.98 7.16 2.00 7.48 2.18
SD 7.55 3.41 7.46 3.07 7.37 3.29 7.45 3.48
Skewness 0.66 2.67 1.06 2.43 1.03 2.62 0.94 2.47
Kurtosis −0.43 10.27 0.43 7.25 0.39 8.79 0.04 6.93
Percentiles 25 1.75 0.00 0.00 0.00 1.00 0.00 1.00 0.00
50 7.00 1.00 4.00 1.00 4.00 0.00 5.00 1.00
75 14.00 4.00 12.00 3.00 12.00 3.00 11.25 3.00
90 19.00 6.00 19.00 6.00 18.00 6.00 19.00 6.00