title: Replication and extension of the simplified modified rankin scale in 150 Chinese stroke patients.
abstract: BACKGROUND
  Recently, a simplified modified Rankin Scale (mRS) questionnaire (smRSq) showed good reliability but has not been tested for its validity by its original creators. Our study aimed to test its reliability and validity in Chinese stroke patients.
  
  
  METHODS
  Randomly chosen paired raters scored the smRSq, the conventional mRS, and the NIH Stroke Scale (NIHSS) face-to-face in 150 hospitalized stroke patients. Inter-rater reliability and concurrent validity were assessed for this translated questionnaire.
  
  
  RESULTS
  For inter-rater reliability of the smRSq, the overall agreement among the raters was 84%, the κ was 0.79 (95% CI 0.72-0.87), and the κw was 0.91 (95% CI 0.88-0.94). For inter-rater reliability of the mRS, the overall agreement among the raters was 81%, the κ was 0.75 (95% CI 0.67-0.83), and the κw was 0.88 (95% CI 0.84-0.92). The agreement between the mRS and smRSq was 71%, κ = 0.63 (95% CI 0.54-0.71), and κw = 0.83 (95% CI 0.79-0.88). The correlation between the NIHSS and the smRSq (concurrent validity) was moderate (Spearman's correlation coefficient 0.70, p < 0.0001).
  
  
  CONCLUSIONS
  Our results confirm the value of the smRSq in the assessment of stroke functional outcome in China. As this is a novel stroke tool, further validations are needed.
authors.affiliation: Department of Neurology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
authors.forename: Jun-Liang
authors.initials: JL
authors.lastname: Yuan
authors.forename: Askiel
authors.initials: A
authors.lastname: Bruno
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Shu-Juan
authors.initials: SJ
authors.lastname: Li
authors.forename: Xiao-Dan
authors.initials: XD
authors.lastname: Zhang
authors.forename: Hai-Ying
authors.initials: HY
authors.lastname: Li
authors.forename: Ke
authors.initials: K
authors.lastname: Jia
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
authors.forename: Andrew C N
authors.initials: AC
authors.lastname: Chen
authors.forename: Wen-Li
authors.initials: WL
authors.lastname: Hu
mesh_terms: D000368:Aged; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D016001:Confidence Intervals; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D020521:Stroke / Q000175:diagnosis* / Q000453:epidemiology; D014175:Translating