Help for SwayStar™ (4.7.3.265)
A description of the Excel table generated by SwayStar™ is given below. The first five columns of the table are fixed to maintain a reference to the patient name and the protocol (called ExpName). Thus, horizontal scrolling occurs after the first 5 columns. Click and drag the horizontal scroll bar beginning in column 6 to see the rest of the data for the recordings (shown in blue). A fuller description of the variables heading each column with an abbreviated label is presented in section 2.7:
If the reference values have been assigned the following coding is used:
Blue value less than 5% percentile of the reference value
Green value within the 5 and 95% percentile of the reference value
Red value greater than the 95% percentile of the reference value





Analysis Variables Table for log file 


Abbreviation 
Parameter 
Unit 
Definition 
Identification 
Subject type 

User defined text field 
External Link 
Link parameter to statistical program 

User defined text field 
Complaint 
Subject's symptoms 

User defined text field 
Subject 
Last name, first name 


ExpName 
Protocol name 






ExpId 
Number of protocol 
N 

ExpTime 
Date and time of recording 


SubjectID 
Number of patient 
N 
Chronological number of entry into database 
VisitId 
Number of visit 
N 
Chronological number of entry into patients' visit database 
RecId 
Number of recording 
N 

Sex 
Subject's sex, loss balance indicated 
m/f+/ 
+ for no loss,  loss of balance, ~ unknown 
Age 
Subject's age 
yrs 

RecID 
Subject/visit/number of recording 
N 





Total Duration 
Trial duration 
s 
Time from the start to the end of actual recording. Not the analysis period! 
Chosen Duration 
Duration chosen for analysis 
s 
Time from the start to the end of recording period used for analysis. 
MVPath 
Mean path velocity 
°/s 
Mean velocity of the vector movement of roll and pitch angular displacement over the complete trial 
MVRms 
Mean velocity RMS 
°/s 
Square root of the squared mean velocity of the vector movement of roll and pitch ang. displacement 
TotAngArea 
Total Angular Area 
(deg)˛ 
Area defined by the envelop of the pitch and roll angular excursions over the complete trial 
TotVelArea 
Total Velocity Area 
(°/s)˛ 
Area defined by the envelop of the pitch and roll velocity excursions over the complete trial 




RoAngMedian 
Median value of roll excursion 
deg 
Median value of roll excursion with respect to first sample 
RoAngRange 
Peaktopeak roll excursion 
deg 
Extent of trunk roll angular displacement over the complete trial 
RoAng90% 
90% range of roll excursion 
deg 
90% percentile range of trunk roll angular displacement over the complete trial 
RoVelMedian 
Median value of roll velocity excursion 
°/s 
Median value of roll velocity excursion 
RoVelRange 
Peaktopeak roll velocity excursion 
°/s 
The extent of trunk roll angular velocity over the complete trial 
RoVel90% 
90% range of roll velocity excursion 
°/s 
90% percentile range of trunk roll angular velocity 




PiAngMedian 
Median value of pitch excursion 
deg 
Median value of pitch excursion with respect to first sample 
PiAngRange 
Peaktopeak pitch excursion 
deg 
Extent of trunk pitch angular displacement over the complete trial 
PiAng90% 
90% range of pitch excursion 
deg 
90% percentile range of trunk pitch angular displacement over the complete trial 
PiVelMedian 
Median value of pitch velocity excursion 
°/s 
Median value of pitch excursion 
PiVelRange 
Peaktopeak pitch velocity excursion 
°/s 
The extent of trunk pitch angular velocity over the complete trial 
PiVel90% 
90% range of pitch velocity excursion 
°/s 
90% percentile range of trunk pitch angular velocity 




RoFreq 1.2 
Spectral density of roll velocity 
(°/s)˛ 
Square root of 3 averaged adjacent spectral density weights at freqs: 0.8, 1.2, 1.6 
RoFreq 2.4 
Spectral density of roll velocity 
(°/s)˛ 
Square root of 3 averaged adjacent spectral density weights at freqs: 2.0, 2.4, 2.8 
RoFreq18.0 
etc 
(°/s)˛ 
… 
RoFreq19.2 
etc 
(°/s)˛ 
… 




PiFreq 1.2 
Spectral density of pitch velocity 
(°/s)˛ 
Square root of 3 averaged adjacent spectral density weights at freqs: 0.8, 1.2, 1.6 
PiFreq 2.4 
Spectral density of pitch velocity 
(°/s)˛ 
Square root of 3 averaged adjacent spectral density weights at freqs: 2.0, 2.4, 2.8 
PiFreq18.0 
… 

… 
PiFreq19.2 
… 

… 




MP0Begin 
Marker Pair 0, begin 
s 
Time of the beginning of the Marker Pair 0 
MP0Int 
Marker Pair 0, interval between markers 
s 
Interval between the markers of the Pair 0 
MP0RoBegAng 
Marker Pair 0, roll begin angular value 
deg 
Roll angular value at the time of the beginning of the Marker Pair 0 
MP0RoEndAng 
Marker Pair 0, roll end angular value 
deg 
Roll angular value at the time of the end of the Marker Pair 0 
MP0RoAngDif 
Marker Pair 0, roll ang. amplitude difference 
deg 
Roll angular value of the difference amplitude of the Marker Pair 0 
MP0RoBegVel 
Marker Pair 0, roll begin velocity value 
°/s 
Roll velocity value at the time of the beginning of the Marker Pair 0 
MP0RoEndVel 
Marker Pair 0, roll end velocity value 
°/s 
Roll velocity value at the time of the end of the Marker Pair 0 
MP0RoMeanVel 
Marker Pair 0, mean roll velocity value 
°/s 
Roll velocity mean value inside the interval defined with Marker Pair 0 
MP0RoVelDiff 
Marker Pair 0, roll vel. amplitude difference 
°/s 
Roll velocity value of the difference amplitude of the Marker Pair 0 
MP0PiBegAng 
Marker Pair 0, pitch begin angular value 
s 
Pitch angular value at the time of the beginning of the Marker Pair 0 
MP0PiEndAng 
Marker Pair 0, pitch end angular value 
s 
Pitch angular value at the time of the end of the Marker Pair 0 
MP0PiAngDif 
Marker Pair 0, pitch ang. amplitude difference 
s 
Pitch angular value of the difference amplitude of the Marker Pair 0 
MP0PiBegVel 
Marker Pair 0, pitch begin velocity value 
°/s 
Pitch velocity value at the time of the beginning of the Marker Pair 0 