IADR Abstract Archives
Reliability of Nasolabial Meaurements on Plaster Casts and Three Dimensional Stereophotogrammetric Images of Casts in Infants with Unilateral Cleft Lip and Palate
Objectives: The purpose of this study was to determine the inter-, intrarater and intermethod reliability of nasolabial measurements on plaster casts and three dimensional (3D) stereophotogrammetric images of casts in infants with unrepaired unilateral cleft lip and palate (UUCLP) performed by experienced and inexperienced rater.
Methods: Preoperative extraoral plaster casts from 42 patients with UUCLP were measured with digital caliper and image acquisition of casts were performed with 3dMDface stereophotogrammetry system (3dMD, Atlanta, GA). Two raters (1 experienced, 1 inexperienced) evaluated 19 nasolabial measurements on two seperate session. Intraclass correlation coefficients (ICC) were used to determine intra- and inter-rater, and inter-method agreement for each measurement.
Results: ICC for measurements on casts/ 3D images for experienced;inexpreienced rater ranged between 0.814-0-989/0.509-0.999;0.43-0.942/0.53-0.97, respectively. Most measurements had interrater ICC greater than 0.75 and mean differences less than 1mm. Regarding intermethod reliability ICC of almost all measurements of experienced rater and 1/3 of inexperienced rater were greater than 0.75. Intra-,interrater and intermethod reliability was less in measurements of nasal, philtrum and nasal floor width.
Conclusions: Measurements of gross dimensions like nasal width, of small dimensions like nostril floor width (non-cleft side) and deformity affected anatomic parts like philtrum width presented low reliabilty. The intra and interrater reliabilty of 3D measurements was high performed by experienced rater. Moreover, the reliability of 3D measurements compared with those made on plaster casts was higher in inexperienced rater. Measurements on 3D images were more sesitive and userfriendly in deeper identications. Therefore, it may be recommended to use stereophotogrammetric 3D images of infants with CLP for nasolabial measurements especially if performed by inexperienced users
Methods: Preoperative extraoral plaster casts from 42 patients with UUCLP were measured with digital caliper and image acquisition of casts were performed with 3dMDface stereophotogrammetry system (3dMD, Atlanta, GA). Two raters (1 experienced, 1 inexperienced) evaluated 19 nasolabial measurements on two seperate session. Intraclass correlation coefficients (ICC) were used to determine intra- and inter-rater, and inter-method agreement for each measurement.
Results: ICC for measurements on casts/ 3D images for experienced;inexpreienced rater ranged between 0.814-0-989/0.509-0.999;0.43-0.942/0.53-0.97, respectively. Most measurements had interrater ICC greater than 0.75 and mean differences less than 1mm. Regarding intermethod reliability ICC of almost all measurements of experienced rater and 1/3 of inexperienced rater were greater than 0.75. Intra-,interrater and intermethod reliability was less in measurements of nasal, philtrum and nasal floor width.
Conclusions: Measurements of gross dimensions like nasal width, of small dimensions like nostril floor width (non-cleft side) and deformity affected anatomic parts like philtrum width presented low reliabilty. The intra and interrater reliabilty of 3D measurements was high performed by experienced rater. Moreover, the reliability of 3D measurements compared with those made on plaster casts was higher in inexperienced rater. Measurements on 3D images were more sesitive and userfriendly in deeper identications. Therefore, it may be recommended to use stereophotogrammetric 3D images of infants with CLP for nasolabial measurements especially if performed by inexperienced users