TY - JOUR
T1 - Convergence insufficiency in patients with post-concussion syndrome is accompanied by a higher symptom load
T2 - a cross-sectional study
AU - Nisted, Ivan
AU - Hellemose, Line Amalie
AU - Eggertsen, Peter Preben
AU - Odgaard, Lene
AU - Bek, Toke
AU - Nielsen, Jørgen Feldbæk
PY - 2024/7
Y1 - 2024/7
N2 - OBJECTIVE: To estimate the prevalence of convergence insufficiency (CI) in adult patients with post-concussion syndrome and determine the impact of CI on symptom load.METHODS: Cross-sectional study of 103 patients with neurological symptoms 2-6 months after a concussion. Symptoms were assessed with the Rivermead Post Concussion Symptoms Questionnaire (RPQ), and CI was diagnosed using near point of convergence, vergence facility, and the Convergence Insufficiency Symptom Survey. The RPQ score for patients with and without CI was compared, and sensitivity, specificity, and area under the receiver operating characteristic curve for the two visually related RPQ questions as indicators of CI were calculated.RESULTS: The proportion of patients diagnosed with symptomatic CI was 20.4% (95% confidence interval: 13.1-29.5%). The RPQ score was significantly higher for patients with symptomatic CI both before (p = .01) and after removal of the two visually related questions in the RPQ-questionnaire (p = .03). The two visually related RPQ questions were unable to detect CI.CONCLUSION: In patients with post-concussion syndrome, the load of nonvisual symptoms is higher in the presence of CI. A prospective interventional study on CI is required to study the relationship between CI and other post-concussion symptoms.
AB - OBJECTIVE: To estimate the prevalence of convergence insufficiency (CI) in adult patients with post-concussion syndrome and determine the impact of CI on symptom load.METHODS: Cross-sectional study of 103 patients with neurological symptoms 2-6 months after a concussion. Symptoms were assessed with the Rivermead Post Concussion Symptoms Questionnaire (RPQ), and CI was diagnosed using near point of convergence, vergence facility, and the Convergence Insufficiency Symptom Survey. The RPQ score for patients with and without CI was compared, and sensitivity, specificity, and area under the receiver operating characteristic curve for the two visually related RPQ questions as indicators of CI were calculated.RESULTS: The proportion of patients diagnosed with symptomatic CI was 20.4% (95% confidence interval: 13.1-29.5%). The RPQ score was significantly higher for patients with symptomatic CI both before (p = .01) and after removal of the two visually related questions in the RPQ-questionnaire (p = .03). The two visually related RPQ questions were unable to detect CI.CONCLUSION: In patients with post-concussion syndrome, the load of nonvisual symptoms is higher in the presence of CI. A prospective interventional study on CI is required to study the relationship between CI and other post-concussion symptoms.
KW - Post-concussion symptoms
KW - brain concussion
KW - convergence insufficiency
KW - mTBI
KW - oculomotor disturbance
KW - Ocular Motility Disorders/etiology
KW - Prevalence
KW - Cross-Sectional Studies
KW - Humans
KW - Middle Aged
KW - Post-Concussion Syndrome/diagnosis
KW - Male
KW - Young Adult
KW - Adolescent
KW - Adult
KW - Female
KW - Surveys and Questionnaires
KW - Aged
UR - http://www.scopus.com/inward/record.url?scp=85189504662&partnerID=8YFLogxK
U2 - 10.1080/02699052.2024.2334355
DO - 10.1080/02699052.2024.2334355
M3 - Journal article
C2 - 38530005
SN - 0269-9052
VL - 38
SP - 645
EP - 651
JO - Brain Injury
JF - Brain Injury
IS - 8
ER -