The amount of exclusive breastfeeding in Iran during the years1991- 2015is estimated 10- 53%,for improwing this, in the first step,the effective factors should be determined.Due to the lack of standard and indigenous questionnaires on the determinants of effective factors on lactation,this study aimed to design and validate native instruments for measuring thefactors affecting exclusive breastfeeding in Kashmars nulliparous based on the theory of planned behavior.
In this cross-sectional study,original tool was designed using the literature review and need assessment of beliefs To validate participated10nursing mothers,content-related validity through the panel of experts with the participation of10 experts in health education and tool design and validity Structures were studied by selecting156 of the survey population.The reliability of the tool was examined by internal consistency and Ray-Test.
The initial questionnaire was designed with 67 items. In the face value and validity of qualitative literature content,some questions were changed and in the face validity,6 items were omitted due to the score of less than11.5.In content validity,considering the cutting point79/0to measure content validity index and cut point of./62for the ratio of credit,18 items were deleted. Structural validity was performed by confirmatory factor analysis in LISREL software,The Reliability of the tool was also approved using methods such as internal consistency(α=0.832)and its stability through retest method (ICC=70.38).Conclusion Questionnaire designed for effective factors on exclusive breastfeeding in primipara women is a trustworthy tool with acceptable reliability and validity and we recommend it in related studiesKeywords: exclusive breastfeeding, theory of planned behavior, design and psychometric.
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