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CDE Detailed Report
This report contains detailed information about the selected CDEs.
Note: If at least one CDE was selected from a copyright- or trademark-protected instrument/scale then all of the CDEs from that instrument/scale are included in this report.
Disease: Traumatic Brain Injury
SubDisease: Comprehensive
Sub-Domain: Biomechanical Devices
CRF: Video Device Confirmation Form
Item count: 29 (29 distinct CDEs)
CDE ID
CDE Name
Variable Name
Definition / Description
Question Text
Permissible Value
Description
Data Type
Instructions
References
Population
Classification (e.g., Core)
Version #
Version Date
Aliases for Variable Name
CRF Module / Guideline
© or TM
Sub-Domain
Domain
Previous Title
Size
Input Restrictions
Min Value
Max Value
Measurement Type
LOINC ID
SNOMED
caDSR ID
CDISC ID
C17402
Site name
SiteName
The name of the site for the study
Site Name:
  
Alphanumeric
No instructions available
No references available
Adult;Pediatric
Supplemental
3.0
6/21/2013
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
Site name
255
Free-Form Entry
       
C19247
Subject ID
SubIDNam
Subject identification ID
Subject ID:
  
Alphanumeric
No instructions available
No references available
Adult;Pediatric
Supplemental–Highly Recommended
1.0
6/5/2014
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C00008
Age value
AgeVal
Value for participant/subject's age, calculated as elapsed time since the birth of the participant/subject.
Subject age:
  
Numeric Values
Years (derived from this data element)
No references available
Adult;Pediatric
Supplemental–Highly Recommended
3.0
8/28/2013
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
Age value
 
Free-Form Entry
0
1800
month
    
C56999
Data collected start date and time
DtCllcStrtDateTime
Date/Time of start of data collection
Date of first event
Time of first event
  
Date or Date & Time
When date/time data are prepared for aggregation or sharing they should be converted to the format specified by ISO 8601, YYYY-MM-DDThh:mm:ss.
Record the date/time according to the ISO 8601, the International Standard for the representation of dates and times (http://www.iso.org/iso/home.html). The date/time should be recorded to the level of granularity known (e.g., year, year and month, complete date plus hours and minutes, etc.).
Adult;Pediatric
Supplemental–Highly Recommended
1.0
12/4/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
       
C06005
Data collected date and time
DataCollDateTime
Date (and time, if applicable and known) the data were collected. This may be the date/time a particular examination or procedure was performed.
Date of last event
Time of last event
  
Date or Date & Time
When date/time data are prepared for aggregation or sharing they should be converted to the format specified by ISO 8601, YYYY-MM-DDThh:mm:ss.
Record the date/time according to the ISO 8601, the International Standard for the representation of dates and times (http://www.iso.org/iso/home.html). The date/time should be recorded to the level of granularity known (e.g., year, year and month, complete date plus hours and minutes, etc.).
Adult;Pediatric
Supplemental–Highly Recommended
3.0
7/24/2013
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
Data collected date and time
 
Free-Form Entry
       
C22780
Date time clock type
DateTimeClockTyp
Type of clock used to record date and time.
 
am;PM;24-hour clock;
am;PM;24-hour clock;
Alphanumeric
No instructions available
No references available
Adult;Pediatric
Supplemental–Highly Recommended
1.0
10/27/2016
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Single Pre-Defined Value Selected
       
C19144
Activity description
ActivityDescription
Description of activity
Activity (Indicate all that pertain to subject):
  
Alphanumeric
Please indicate all activities under study which pertain to the subject (e.g. football, soccer). Associated CDEs are C56787, C56855, and C56826.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
5/29/2014
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
4000
Free-Form Entry
       
C56788
Camera manufacturer name
CameraManufacname
The name of the camera manufacturer.
Camera manufacturer:
  
Alphanumeric
Please indicate manufacturer of video camera(s) used for recording event footage.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56789
Camera model type
CamModelTyp
The type of model that the camera being used is.
Camera model:
  
Alphanumeric
Please indicate model of video camera(s) used for recording event footage.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56790
Camera resolution type
CamResolnTyp
The type of resolution being used by the camera.
Camera resolution:
  
Alphanumeric
Please indicate resolution of video camera(s) used for recording event footage.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56791
Camera sample rate
CamSampleRate
The camera's sample rate.
Camera sample rate:
  
Alphanumeric
Please indicate sample/frame rate of video camera(s) used for recording event footage.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56792
Camera position type
CamPosTyp
The type of position(s) the camera has been placed in.
Camera positions:
  
Alphanumeric
Please indicate positions of video camera(s) used for recording event footage.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56793
Timestamp creation method type
TimesCreMethdTyp
The method used for timestamp creation.
Method of timestamp creation:
  
Alphanumeric
Please indicate method of creating timestamps on video footage. The approach used to generate a timestamp for each individual video frame used to verify impacts. The timestamp is the time of day of a given video frame which will be compared with the time of day an event is recorded via the device. The timestamp can be generated by the camera using an internal clock (e.g., a GPS synched clock, an internal software clock, etc.) or can be tracked using an external source (e.g., a digital clock in view of the camera, calibrating the frames using a digital clock shown a single time, etc.). These methods are not exclusive, and other approaches may be described.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C57028
Timestamp device video synchronization resolution error duration
TimesDevVidSynResolErrDur
The resolution time for time-synchronization between video and device or the amount of error allowed between device timestamp and video timestamp
Resolution of time-synchronization between video and device: (e.g. +/- second, +/- millisecond)
  
Numeric Values
Resolution of time-synchronization is the amount of error allowed between the device timestamp and video timestamp. Appropriate answers for this would be ±1second, ±1millisecond, etc. The resolution will depend on the accuracy of the device clock and the accuracy of the video clock (e.g., if the device timestamp is accurate to the millisecond, and the video timestamp is accurate to the second the resolution would be ±1second). Please indicate time resolution of time-synchronization between the video and the device. For example, if both video and device has 1 second resolution for their real-time stamps, the time resolution would be 1 second.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
12/12/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
  
millisecond
    
C56794
Video device time synchronization method type
VidDevTimeSyncMethdTyp
The method of time-synchronization between the video and the device.
Method of time-synchronization between video and sensor:
  
Alphanumeric
The approach used to synchronize the timestamps of the device and video. Please choose or describe the method to synchronize video and device information. The time-synchronization between the device and video can be accomplished using several approaches. For example, both device and video could be synchronized with a third source (e.g., the NIST traceable time source time.gov, or localized computer time source), or they could be synchronized by forcing events on the devices in view of the camera and documenting any offsets in time. These methods are not exclusive, and other approaches may be described. The requested input is for a description of how the time-synchronization between the device and video was accomplished.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56795
Video device verification method type
VidDevVeriMethdTyp
The method of verification (device-video vs. video-device).
Method of cross-verifying video and device exposures:
Device as ground truth;Video as ground truth;Only impacts/exposures verified in both device data and video are considered;Other specify;
Device as ground truth;Video as ground truth;Only impacts/exposures verified in both device data and video are considered;Other specify;
Alphanumeric
Data is best described when video and data correspond (option 3). The accelerometry device and video recording can independently capture exposure information and can be cross-verified to increase confidence of the exposure measurement. This CDE differentiates which set of information serves as the ground truth for verification. For example, if video is served as ground truth, exposures captured on video but not measured by the device would be considered as missing (false negatives). It is also an option to only consider exposures measured by both the video and the device to be 'verified' exposures. Please select from following options or, if another method is used, provide a detailed description of the method.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Single Pre-Defined Value Selected
       
C58458
Video device verification method other text
VidDevVeriMethdOTH
The other specify field for method of verification (device-video vs. video-device).
Method of cross-verifying video and device exposures:
  
Alphanumeric
Data is best described when video and data correspond (option 3). The accelerometry device and video recording can independently capture exposure information and can be cross-verified to increase confidence of the exposure measurement. This CDE differentiates which set of information serves as the ground truth for verification. For example, if video is served as ground truth, exposures captured on video but not measured by the device would be considered as missing (false negatives). It is also an option to only consider exposures measured by both the video and the device to be 'verified' exposures. Please select from following options or, if another method is used, provide a detailed description of the method.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56796
Video device analysis link method type
VIdDevnaLinkMethdTyp
The method of analysis/link (algorithm such as nearest neighbors after identifying all video and all sensor events independently vs. manual linking).
Method of analysis/link (algorithm):
Maximize exposure timing correlation after identifying all video and all device impacts/exposure(s);Real-time stamp matching between video and device;Other, specify;
Maximize exposure timing correlation after identifying all video and all device impacts/exposure(s);Real-time stamp matching between video and device;Other, specify;
Alphanumeric
Exposures measured by the device and those observed in video need to be linked with each other for verification. For example, if a sports player was observed to sustain a head impact at 10:30:56 am on video while wearing an accelerometry device, it is expected that the accelerometry device will have a recording corresponding to this observation. The method to link the exposures could include 1) identifying the time differences between exposures in video or device and finding the time-syncing difference to maximize the correlation between the video exposure timings and device exposure timings, 2) having a timestamp for each exposure on the video or device that is synchronized with a standard real-time clock (e.g. nist.gov time) and correlating exposures via the real-time stamp. Please choose from the following options, or if another method is used, provide a detailed description of the method.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Single Pre-Defined Value Selected
       
C56950
Video device analysis link method type other text
VIdDevAnaLinkMethdTypOTH
The free-text field related to 'Video device analysis link method type' specifying other text.
Other, specify:
  
Alphanumeric
No instructions available
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
 
255
Free-Form Entry
       
C56797
Video device maximum allowable delta t value
VidDevMaxAllowDeltaTVal
The maximum allowable DeltaT value for the study.
Maximum allowable DeltaT (DeltaT- amount of time between an identified sensor/video event):
  
Numeric Values
Where DeltaT is the amount of time between an identified device/video exposure(s). Due to uncertainties in real-time stamps or time offset calculations, the timing of individual exposures may not have an exact match between video and device. For example, if there is a +/- one second uncertainty in the timestamp, it is possible that a video exposure at 12:30:45 may be matched with a device exposure at 12:30:46. This CDE specifies the amount of tolerance allowed for the difference between video and device time stamps. Indicate time offset in number of seconds between video and device time stamps allowed for linking exposures.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
  
millisecond
    
C56798
Video device true positive impact count
VidDevTruePosImpactCt
The number of true positive impacts, in which both the video and the device indicate an event happened within a small window of time.
Number of true positive exposures (Both video and sensor indicate an event happened within small window of time):
  
Numeric Values
Both video and device indicate an exposure(s)- happened within the allowable time-period (Maximum Allowable DeltaT). Head impact events in which both the video and the device indicate an exposure. Through careful review of the video, identify head impact exposures. The definition of this will vary by the sport setting studied but could include identifiable change in the head kinematics (in the case of a head impact in football for example) or an identifiable change in the ball trajectory (in the case of a head to soccer ball impact). It is highly suggested that this process be conducting by multiple coders blinded to each other’s' efforts. Have a master coder reconcile any differences in exposure identification. Count the number of head impact events recorded on the device that can be confirmed via video. This may be tied to g-force level (e.g., impact as 25g+).
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
       
C56799
Video device false positive count
VidDevFalsePosCt
The number of false positives from the study, in which the device indicated an event with no verification via video within an allowable amount of time.
Number of false positive exposures (sensor indicated an event with no verification via video within an allowable amount of time):
  
Numeric Values
Head impact exposures recorded on the device but unable to be verified by video within the allowable time-period (Maximum Allowable DeltaT). Through careful review of the video, identify head impact exposures. The definition of this will vary by the sport setting studied but could include identifiable change in the head kinematics (in the case of a head impact in football for example) or an identifiable change in the ball trajectory (in the case of a head to soccer ball impact). It is highly suggested that this process be conducting by multiple coders blinded to each other’s' efforts. Have a master coder reconcile any differences in exposure identification. Count the number of head impact exposures recorded on the device that cannot be confirmed via video. This should only include those events in which the player for whom the exposure is recorded is visible on the video. It should not include unverifiable exposures out of frame of the video. This may be tied to g-force level (e.g., impact as 25g+).
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental–Highly Recommended
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
       
C56801
Video device false negative count
VidDevFalseNegCt
The number of false negatives from the study, in which the video indicates an event with no corresponding device event within an allowable amount of time.
Number of false negative exposures
  
Numeric Values
Head impact exposures observed on video but lacking corresponding device exposure data within the allowable time-period (Maximum Allowable DeltaT). Through careful review of the video, identify head impact exposures. The definition of this will vary by the sport setting studied but could include identifiable change in the head kinematics (in the case of a head impact in football for example) or an identifiable change in the ball trajectory (in the case of a head to soccer ball impact). It is highly suggested that this process be conducting by multiple coders blinded to each other’s' efforts. Have a master coder reconcile any differences in exposure identification. Count the number of head impact exposures identified on video that do not have any corresponding data on the device within the allowable time-period.
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
       
C56803
Video device head to head positive impact count
VidDevH2HPosImpactCt
The number of true positive head to head impacts counted in the study through video.
Of the true positive exposures, number of confirmed head to head exposures:
  
Numeric Values
The number of visually verified head impact events that resulted from head to head contact (including helmet to helmet contact).
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
       
C56804
Video device head to body true positive impact count
VidDevH2BTrPosImpactCt
The number of true positive head to body impacts counted in the study through video.
Of the true positive exposures, number of confirmed head to body exposures
  
Numeric Values
The number of visually verified head impact events that resulted from head to body contact (e.g., head contacts the torso of another person).
Cortes N, Lincoln AE, Myer GD, Hepburn L, Higgins M, Putukian M. Video Analysis Verification of Head Impact Events Measured by Wearable Sensors. American Journal of Sports Medicine. 2017;45:2379-2387.

Kuo C, Wu LC, Loza J, Senif D, Anderson S, Camarillo DB. Comparison of video-based and sensor-based head impact exposure. bioRxiv 235432. 2017. doi: https://doi.org/10.1101/235432
Adult;Pediatric
Supplemental
1.0
7/24/2017
Aliases for variable name not defined
Video Device Confirmation Form
Biomechanical Devices
Disease/Injury Related Events
  
Free-Form Entry
       
12-11-2018
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