Development of the Home Cooking EnviRonment and Equipment Inventory Observation form (Home-CookERI TM ): An Assessment of Content Validity, Face Validity, and Inter-Rater Agreement
Quantifying Home Cooking EnviRonments has applications in nutrition epidemiology, health promotion, and nutrition interventions. This study aimed to develop a tool to quantify household cooking environments and establish its content validity, face validity, and inter-rater agreement. The Home Cookin...
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Published in | Nutrients Vol. 12; no. 6; p. 1853 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
MDPI AG
21.06.2020
MDPI |
Subjects | |
Online Access | Get full text |
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Summary: | Quantifying Home Cooking EnviRonments has applications in nutrition epidemiology, health promotion, and nutrition interventions. This study aimed to develop a tool to quantify household cooking environments and establish its content validity, face validity, and inter-rater agreement.
The Home Cooking EnviRonment and equipment Inventory observation form (Home-CookERI™) was developed as a 24-question (91-item) online survey. Items included domestic spaces and resources for storage, disposal, preparation, and cooking of food or non-alcoholic beverages. Home-CookERI
was piloted to assess content validity, face validity, and usability with six Australian experts (i.e., dietitians, nutrition researchers, chefs, a food technology teacher, and a kitchen designer) and 13 laypersons. Pilot participants provided feedback in a 10 min telephone interview. Home-CookERI™ was modified to an 89-item survey in line with the pilot findings. Inter-rater agreement was examined between two trained raters in 33 unique Australian households. Raters were required to observe each item before recording a response. Home occupants were instructed to only assist with locating items if asked. Raters were blinded to each other's responses. Inter-rater agreement was calculated by Cohen's Kappa coefficient (κ) for each item. To optimize κ, similar items were grouped together reducing the number of items to 81.
Home-CookERI
had excellent content and face validity with responding participants; all 24 questions were both clear and relevant (X
(1,
= 19; 19.0,
= 0.392)). Inter-rater agreement for the modified 81-item Home-CookERI™ was almost-perfect to perfect for 46% of kitchen items (
= 37 items,
= 0.81-1), moderate to substantial for 28% (
= 23,
= 0.51-0.8), slight to fair for 15% (
= 12,
= 0.01-0.5), and chance or worse for 11% of items (
= 9,
≤ 0.0). Home-CookERI
was further optimized by reduction to a 77-item version, which is now available to researchers.
Home-CookERI™ is a comprehensive tool for quantifying Australian household cooking environments. It has excellent face and content validity and moderate to perfect inter-rater agreement for almost three-quarters of included kitchen items. To expand Home-CookERI™ applications, a home occupant self-completion version is planned for validation. |
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ISSN: | 2072-6643 2072-6643 |
DOI: | 10.3390/nu12061853 |