A randomized controlled trial examining consumers’ perceptions and opinions on using different versions of a FoodFlip© smartphone application for delivery of nutrition information

Table 3 Consumers’ Perceptions of the FoodFlip© App Usability and Functionality

7-point Likert-scale statements	X²	exp (B)	95% Confidence Interval		p-value
7-point Likert-scale statements	X²	exp (B)	Lower	Upper	p-value
Usability¹
The product search feature was easy to use	0.58				0.90
I liked the barcode scanner feature	2.74				0.43
Overall, I found the app easy to use	4.17				0.24
I found the app confusing	2.25				0.52
Functionality²
The app provided me with information that I can use	18.12				0.00
Traffic Light		1.06	0.83	1.35	0.65
‘High in’ Warning		1.02	0.80	1.30	0.89
Star Ratings		0.67	0.52	0.85	0.00
Control (NFt)		1.00	.	.	.
I found the app to be believable	21.51				0.00
Traffic Light		0.90	0.71	1.16	0.42
‘High in’ Warning		0.93	0.73	1.19	0.56
Star Ratings		0.59	0.46	0.75	0.00
Control (NFt)		1.00	.	.	.
Using the app helped me understand the nutrient levels in the food	34.75				0.00
Traffic Light		1.07	0.84	1.37	0.58
‘High in’ Warning		0.78	0.61	1.00	0.05
Star Ratings		0.55	0.44	0.71	0.00
Control (NFt)		1.00	.	.	.
Using the app helped me to compare the healthiness between similar products	19.78				0.00
Traffic Light		1.67	1.30	2.13	0.00
‘High in’ Warning		1.49	1.17	1.91	0.00
Star Ratings		1.20	0.94	1.53	0.14
Control (NFt)		1.00	.	.	.

Data analyzed using Ordinal Logistic Regression to assess for associations of the INRS systems with the 7-point Likert scale responses, controlling for the following covariates: gender, ethnicity, BMI, education, income, age, health literacy score. The 7-point Likert scale responses (1 = completely disagree, 7 = completely agree) of the pre-defined set of app-related statements (n = 8) were treated as ordinal dependent variables whereas the INRS system was treated as the categorical independent variables. ¹Usability was defined as the ‘quality of user interface’ which assesses the user satisfaction and user engagement with the app and ²Functionality was defined as the operability of the app according to its purpose or design for the study’s objective, measuring the user evaluation of comparing the nutritional information of products. p < 0.01 was considered statistically significant

ISSN: 1479-5868