Skip to main content

Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 3 Internal consistency of the answers of all rater groups for the three treatment groups, measured by Cronbach’s alpha, and influence of the deletion of each item by each subscale on Cronbach’s alpha values

From: Facial esthetic outcome of functional followed by fixed orthodontic treatment of class II division 1 patients

GroupItemsCronbach’s alpha
Activator (if item deleted)Twin block (if item deleted)Control (if item deleted)All (if item deleted)
OrthodontistsAll0.9390.9480.9810.956
Face0.945*0.9310.9780.952
Lower face0.9050.9210.9760.933
Upper lip0.9060.9440.9790.946
Lower lip0.9320.957*0.9740.951
Chin0.9330.9280.9720.945
PatientsAll0.7700.8860.8730.855
Face0.7070.8300.8220.798
Lower face0.826*0.8360.8420.836
Upper lip0.6270.8710.8330.810
Lower lip0.7410.891*0.879*0.850
Chin0.7170.8770.8450.826
ParentsAll0.9510.9530.9740.960
Face0.9510.9380.9620.952
Lower face0.9290.9330.9680.945
Upper lip0.9390.9270.9660.945
Lower lip0.9300.9390.9630.944
Chin0.952*0.968*0.976*0.963*
LaypersonsAll0.9630.9550.9560.960
Face0.9590.9410.9430.952
Lower face0.9480.9480.9310.945
Upper lip0.9540.9360.959*0.954
Lower lip0.9550.9470.957*0.954
Chin0.9560.9520.9330.949
AllAll0.9360.9330.9500.941
Face0.9320.9110.9360.929
Lower face0.9220.9050.9350.923
Upper lip0.9110.9160.9420.925
Lower lip0.9200.9270.9420.931
Chin0.9220.9290.9380.930
  1. *Cases where item deletion resulted in increased Cronbach’s alpha value of the corresponding subscale