title: Smallest real difference of 2 instrumental activities of daily living measures in patients with chronic stroke.
abstract: OBJECTIVE
  To estimate the smallest real difference (SRD) values of 2 instrumental activities of daily living measures (the Nottingham Extended Activities of Daily Living [NEADL] and the Frenchay Activities Index [FAI]) in patients with chronic stroke.
  
  
  METHODS
  Test-retest reliability study.
  
  
  METHODS
  Physical rehabilitation units of 5 hospitals.
  
  
  METHODS
  Chronic stroke patients (N=52; 37 men, 15 women) who were discharged from the hospital for more than 6 months.
  
  
  METHODS
  Not applicable.
  
  
  METHODS
  Both measures were administered twice about 2 weeks apart to participants. The SRD was calculated on the basis of standard error of measurement: SRD = 1.96 × √2 × Standard error of measurement. SRD% (the value of SRD divided by total score of a measure) was used to compare measurement errors across both measures. Reproducibility between successive measurements of the measures was investigated with intraclass correlation coefficients (ICCs).
  
  
  RESULTS
  The SRD (SRD%) values of the NEADL and the FAI were 12.0 (21.1%) and 6.7 (14.9%), respectively. Test-retest reproducibility of both measures was high (ICC: NEADL=.89, FAI=.89).
  
  
  CONCLUSIONS
  Because of substantial SRD values of the NEADL and the FAI, prospective users should be cautious in using both measures to detect real change for a single subject.
authors.affiliation: School of Occupational Therapy, Chung Shan Medical University, Taichung, Taiwan.
authors.forename: Wen-Shian
authors.initials: WS
authors.lastname: Lu
authors.forename: Christine C
authors.initials: CC
authors.lastname: Chen
authors.forename: Sheau-Ling
authors.initials: SL
authors.lastname: Huang
authors.forename: Ching-Lin
authors.initials: CL
authors.lastname: Hsieh
mesh_terms: D000203:Activities of Daily Living; D000368:Aged; D002908:Chronic Disease; D015331:Cohort Studies; D004185:Disability Evaluation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D026741:Physical Therapy Modalities / Q000592:standards*; D012047:Rehabilitation Centers; D015203:Reproducibility of Results; D020521:Stroke / Q000175:diagnosis; D000071939:Stroke Rehabilitation; D013624:Taiwan; D016896:Treatment Outcome