Reliability and Validity of a Shortened Version of an Instrument for Diabetes Self-Care Agency.
OBJECTIVE
The purpose of this study was to develop a shortened version of the Instrument of Diabetes Self-Care Agency (IDSCA).


METHODS
In the development of the shortened version of IDSCA, intraclass correlation coefficient 2 (ICC2) analysis was done to determine items to be deleted. However, the 7 subscales were retained. The shortened IDSCA was evaluated for internal consistency, reproducibility, concurrent validity, criterion-related validity, and goodness of fit.


RESULTS
The shortened IDSCA included 35 items addressing 7 subscales. High ICC2 (.804) and a high Cronbach's alpha (.89) indicate internal consistency and reproducibility. A high correlation (.62) between the shortened version of the IDSCA and the Self-Care Agency Questionnaire indicated concurrent validity.


CONCLUSIONS
The shortened IDSCA provides a reliable and valid measure of self-care agency of individuals with diabetes.
Division of Health Science, Osaka University Graduate School of Medicine, Japan.
Yoshiko
Y
Miyawaki
Yasuko
Y
Shimizu
Kyoko
K
Uchiumi
Kawai
K
Asou
Naoko
N
Murakado
Kumiko
K
Kuroda
Harue
H
Masaki
Natsuko
N
Seto
Hidetoki
H
Ishii
D000328:Adult; D003924:Diabetes Mellitus, Type 2 / Q000451:nursing / Q000517:prevention & control*; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D009730:Nursing Assessment; D015203:Reproducibility of Results; D012648:Self Care; D011795:Surveys and Questionnaires