A cross-sectional survey examining motivation and beliefs to participating in a web-based prospective cohort study on nutrition and health among individuals with a low socioeconomic status

Table 2 Multivariate Analyses of Behavioural and Control Beliefs Associated with Attitude and PBC Towards Participation in NutriQuébec

Items	Standardized ß	P-value*	95% CI
Behavioural beliefs associated with attitude
Advantages
Contributing to improving collective health	0.23	0.0003	0.11–0.35
Having the opportunity to improve one’s lifestyle habits	0.30	< 0.0001	0.17–0.43
Having the opportunity to improve the family’s lifestyle habits	0.02	0.73	−0.09 - 0.13
Learning new knowledge on health	0.05	0.46	−0.09 - 0.19
Contributing to advancing science	0.08	0.15	−0.03 - 0.19
Disadvantages
Too time-consuming to complete the questionnaire	−0.18	< 0.0001	−0.24 - -0.12
Model R²	58.8
Control beliefs associated with PBC
Facilitating factors
Receiving a personalized brief health assessment	0.14	0.0006	0.06–0.22
The use of simple questions	0.13	0.0062	0.04–0.23
Anonymity	−0.02	0.6597	− 0.10 - 0.06
Barriers
Participating even without financial incentives	0.11	0.0011	0.04–0.18
Participating even if the completion of the questionnaires would take two hours	0.19	< 0.0001	0.11–0.26
Model R²	45.2

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