title: [Evaluation on the validity and reliability of the Diabetes Self-management Knowledge, Attitude, and Behavior Assessment Scale (DSKAB)].
abstract: OBJECTIVE
  To evaluate the validity and reliability of Diabetes Self-management Knowledge, Attitude, and Behavior Assessment Scale (DSKAB).
  
  
  METHODS
  We selected 460 patients with diabetes in the community, used the scale which was after two rounds of the Delphi method and pilot study. Investigators surveyed the patients by the way of face to face. by draw lots, we selected 25 community diabetes randomly for repeating investigations after one week. The validity analyses included face validity, content validity, construct validity and discriminant validity. The reliability analyses included Cronbach's α coefficient, θ coefficient, Ω coefficient, split-half reliability and test-retest reliability.
  
  
  RESULTS
  This study distributed a total of 460 questionnaires, reclaimed 442, qualified 432. The score of the scale was 254.59 ± 28.90, the scores of the knowledge, attitude, behavior sub-scales were 82.44 ± 11.24, 63.53 ± 5.77 and 108.61 ± 17.55, respectively. It had excellent face validity and content validity. The correlation coefficient was from 0.71 to 0.91 among three sub-scales and the scale, P<0.001. The common factor cumulative variance contribution rate of the scale and three sub-scales was from 57.28% to 67.19%, which achieved more than 50% of the approved standard, there was 25 common factors, 91 items of the total 98 items held factor loading ≥0.40 in its relevant common factor, it had good construct validity. The scores of high group and low group in three sub-scales were: knowledge (91.12 ± 3.62) and (69.96 ± 11.20), attitude (68.75 ± 4.51) and (58.79 ± 4.87), behavior (129.38 ± 8.53) and (89.65 ± 11.34),mean scores of three sub-scales were apparently different, which compared between high score group and low score group, the t value were - 19.45, -16.24 and -30.29, respectively, P<0.001, and it had good discriminant validity. The Cronbach's α coefficient of the scale and three sub-scales was from 0.79 to 0.93, the θ coefficient was from 0.86 to 0.95, the Ω coefficient was from 0.90 to 0.98, split-half reliability was from 0.89 to 0.95.Test-retest reliability of the scale was 0.51;the three sub-scales was from 0.46 to 0.52, P<0.05.
  
  
  CONCLUSIONS
  The validity and reliability of the Diabetes Self-management Knowledge, Attitude, and Behavior Assessment Scale are excellent, which is a suitable instrument to evaluate the self-management for patients with diabetes.
authors.affiliation: National Center for Chronic and Noncommunicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100050, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Liu
authors.forename: Long
authors.initials: L
authors.lastname: Dai
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.forename: Nongping
authors.initials: N
authors.lastname: Feng
authors.forename: Qianhui
authors.initials: Q
authors.lastname: Wu
authors.forename: Yonghai
authors.initials: Y
authors.lastname: Lin
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
authors.forename: Dong
authors.initials: D
authors.lastname: Tan
authors.forename: Jinhua
authors.initials: J
authors.lastname: Zhang
authors.forename: Huijuan
authors.initials: H
authors.lastname: Tu
authors.forename: Changfeng
authors.initials: C
authors.lastname: Li
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Wang
mesh_terms: D003920:Diabetes Mellitus / Q000628:therapy*; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D010865:Pilot Projects; D015203:Reproducibility of Results; D012648:Self Care; D011795:Surveys and Questionnaires