Table 2

Bivariate comparison of the presence of individual post-concussion symptoms at 28 days

Symptoms,
N (%) of total patients reporting this symptom
HeadacheNauseaProblem with balanceDizzinessSensitivity to lightSensitivity to noiseVision problemsFatigueIrritabilitySadnessNervousnessDifficulty concentratingDifficulty remembering
Headache,
N=593 (19.4%)
100%34%33%44%45%46%25%62%41%27%28%50%37%
Nausea,
N=296 (9.7%)
68%100%43%53%48%51%31%68%52%35%36%53%42%
Problem with balance,
N=294 (9.6%)
67%43%100%68%55%56%39%71%53%41%37%65%42%
Dizziness,
N=358 (11.7%)
72%44%56%100%52%54%35%72%50%38%34%62%46%
Sensitivity to light,
N=382 (12.5%)
69%37%43%49%100%64%32%68%49%34%34%61%45%
Sensitivity to noise,
N=412 (13.5%)
66%37%40%47%60%100%30%68%53%32%37%63%47%
Vision problems,
N=205 60.7%)
70%45%56%60%60%60%100%75%50%43%42%68%55%
Fatigue,
N=665 (21.7%)
55%30%32%39%39%42%23%100%47%31%30%49%36%
Irritability,
N=462 (15.1%)
54%33%34%39%41%47%22%68%100%41%38%55%41%
Sadness,
N=272 (8.9%)
60%38%44%50%48%47%32%76%69%100%53%60%48%
Nervousness,
N=276 (8.9%)
59%39%40%45%47%55%31%73%64%52%100%62%47%
Difficulty concentrating,
N=488 (15.9%)
61%32%38%45%48%53%29%67%52%33%35%100%52%
Difficulty remembering,
N=354 (11.6%)
62%35%45%47%48%53%32%68%52%37%36%72%100%
  • Percentages represent the proportion of patients with the symptom in column 1 who are concurrently reporting the additional symptoms in the top row.

  • Colours correspond to the frequency of co-occurence of post-concussion symptoms, ranging from green to red, with green corresponding to the lowest co-occurence and red the highest co-occurence of symptoms.