title: Reliability and Applicability of the Bayley Scale of Infant Development-II for Children With Cerebral Palsy.
abstract: OBJECTIVE
  To obtain reliability and applicability of the Korean version Bayley Scale of Infant Development-II (BSID-II) in evaluating the developmental status of children with cerebral palsy (CP).
  
  
  METHODS
  The inter-rater reliability of BSID-II scores from 68 children with CP (46 boys and 22 girls; mean age, 32.54±16.76 months; age range, 4 to 78 months) was evaluated by 10 pediatric occupational therapists. Patients were classified in several ways according to age group, typology, and the severity of motor impairment by the level of the Gross Motor Function Classification System (GMFCS). The measures were performed by video analysis, and the results of intraclass correlation (ICC) were obtained for each of the above classifications. To evaluate the clinical applicability of BSID-II for CP, its correlation with the Gross Motor Function Measure (GMFM), which has been known as the standard motor assessment for CP, was investigated.
  
  
  RESULTS
  ICC was 0.99 for the Mental scale and 0.98 for the Motor scale in all subjects. The values of ICC ranged from 0.92 to 0.99 for each age group, 0.93 to 0.99 for each typology, and 0.99 to 1.00 for each GMFCS level. A strong positive correlation was found between the BSID-II Motor raw score and the GMFM total score (r=0.84, p<0.001), and a moderate correlation was observed between the BSID-II Mental raw score and the GMFM total score (r=0.65, p<0.001).
  
  
  CONCLUSIONS
  The Korean version of BSID-II is a reliable tool to measure the functional status of children with CP. The raw scores of BSID-II showed a great correlation with GMFM, indicating validity of this measure for children with CP on clinical basis.
authors.affiliation: Department of Rehabilitation Medicine, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea.
authors.forename: Ji Hyun
authors.initials: JH
authors.lastname: Lee
authors.forename: Hye Kyung
authors.initials: HK
authors.lastname: Lim
authors.forename: Eunyoung
authors.initials: E
authors.lastname: Park
authors.forename: Junyoung
authors.initials: J
authors.lastname: Song
authors.forename: Hee Song
authors.initials: HS
authors.lastname: Lee
authors.forename: Jooyeon
authors.initials: J
authors.lastname: Ko
authors.forename: Minyoung
authors.initials: M
authors.lastname: Kim
keywords: Cerebral palsy; Child development; Gross motor function; Reliability