0 = Male
1 = Female

Which year are you now in dental school? Recategoriesd Into academic level , Year 2+3=0 (Lab=preclininc) and year 4+5+6=lab and Clinic, as clinic
0 = Preclinic
1 = Clinic

Are you right-handed or left-handed?
0 = Right- handed
1 = Left- handed

Have you had to re-sit a year before in dental school?
1 = No
2 = Yes

0 = No
1 = Yes

WMSDs (dependent variable) at leaset one symptoms
0 = Yes
1 = No