(2) Understanding the theoretical determinants of nurses’ eating and physical activity behaviours

This step reflects a behavioral diagnosis, whereby reasons for nurses’ unhealthy eating and physical activity behaviours and what needs to change to improve nurses eating and physical activity behaviors were identified. Semi-structured qualitative interviews followed by a quantitative survey were undertaken based on the TDF. The TDF is an overarching framework that summarises 84 known determinants of behaviour into fourteen theoretical construct domains [21], allowing the systematic investigation of the psychological determinants which may need to be addressed in order to achieve behaviour change [21]. The methods of the qualitative interview component of this step are reported elsewhere [28]. A separate 113-item survey based on the determinants identified in these qualitative interviews was also constructed and completed by 245 nurses (226 females, 17 males; recruited from hospitals based in the UK) [29]. This enabled quantitative estimation of the relative importance of different determinants.

The current paper focusses on step three in more detail. Specifically, how the findings from the behavioural diagnosis above were mapped onto the BCW framework [22] and BCTTv1 [30] to systematically develop a workplace behaviour change intervention for nurses. The current paper therefore builds on the empirical work generated from steps one and two.

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