Factors influencing consumer dietary health preventative behaviours

BMC Public Health

Table 4 Psychometric Properties of Constructs.

Construct	Items	Mean	SD	Reliability diagnosis	AVE
A. Health behaviours
Positive diet action	3	3.6	0.7	0.6	0.34
Negative diet action	3	3.4	0.7	0.5	0.25
Alcohol moderation	1	3.6	1.2	...	...
Label information acquisition	1	3.9	1.1	...	...
B. Health motivation
Proactive action	2	3.7	0.7	0.78	0.65
Passive behaviour *	4	2.5	0.7	0.71	0.39
C. Health ability characteristics
Nutrition knowledge scale	6	...	...	...	...
Self-reported nutrition knowledge	1	3.4	0.9
Education	1	12.5	2.7	...	...
Age	1	43.4	15.1	...	...
Income (sterling pounds)	1	77.6	68.3	...	...
D. Perceived threat of disease	5	7.6	5.2	0.82	0.49
E. Efficacy	3	4.1	0.6	0.86	0.68

NOTE: The composite or construct reliability is evaluated based on Cronbach's alpha for continuous variables: (∑λ_i)²/(∑λ_i)² + (∑v [δ_i]). The convergent validity is evaluated using the average variance extracted: AVE = (∑λ_i ²)/(∑λ_i ²) + (∑v [δ_i]); where λ_i= completely standardised factor loading for item i; ∑v [δ_i] = completely standardised error variance for item i.
*) Passive behaviour: the scale values were reversed so that high scores reflect high levels of health motivation.
Source: own calculations

ISSN: 1471-2458