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Table 5 Frequency and proportion of correct responses to concussion knowledge index items

From: Concussion knowledge, attitudes and reporting intention among adult competitive Muay Thai kickboxing athletes: a cross-sectional study

Concussion Knowledge Index (CKI) item Frequency (%)
Section 1 (Statements – True / False)
There is a possible risk of death if a second concussion occurs before the first one has healed. 175 (90.7%)
People who have had one concussion are more likely to have another concussion. 173 (89.6%)
In order to be diagnosed with a concussion, you have to be knocked out. 191 (99.0%)
A concussion can only occur if there is a direct hit to the head. 157 (81.3%)
Being knocked unconscious always causes permanent damage to the brain. 132 (68.4%)
Symptoms of a concussion can last for several weeks. 190 (98.4%)
Sometimes a second concussion can help a person remember things that were forgotten after the first concussion. 172 (89.1%)
After a concussion occurs, brain imaging (e.g., CAT Scan, MRI, X-Ray, etc.) typically shows visible physical
damage (e.g., bruise, blood clot) to the brain.
59 (30.6%)
If you receive one concussion and you have never had a concussion before, you will become less intelligent. 186 (96.4%)
After 10 days, symptoms of a concussion are usually completely gone. 79 (40.9%)
After a concussion, people can forget who they are and not recognize others but be perfect in every other way. 55 (28.5%)
Concussions can sometimes lead to emotional disruptions. 187 (96.9%)
An athlete who gets knocked out after getting a concussion is experiencing a coma. 38 (19.7%)
There is rarely a risk to long-term health and well-being from multiple concussions. 171 (88.6%)
Section 2 (Scenarios – True / False)
Scenario 1:
While playing in a game, Player Q and Player X collide with each other and each suffers a concussion. Player Q has never had a concussion in the past. Player X has had 4 concussions in the past.
 
It is likely that Player Q’s concussion will affect his long-term health and well-being. 121 (62.7%)
It is likely that Player X’s concussion will affect his long-term health and well-being. 177 (91.7%)
Scenario 2:
Player F suffered a concussion in a game. She continued to play in the same game despite the fact that she continued to feel the effects of the concussion.
 
Even though Player F is still experiencing the effects of the concussion, her performance will be the same as it would be had she not suffered a concussion. 175 (90.7%)
Section 5 (Symptom recognition – Check all that apply)
Headache 184 (95.3%)
Sensitivity to light 171 (88.6%)
Difficulty remembering 173 (89.6%)
Drowsiness 141 (73.1%)
Feeling in a “fog” 184 (95.3%)
Feeling slowed down 154 (79.8%)
Difficulty concentrating 178 (92.2%)
Dizziness 183 (94.8%)