Fig. 3

Median model, 95 % CI worst fitting, and 95 % CI best fitting model. Figure note: PBC: perceived behavioural control; ATT: behavioural attitude; PB: past behaviour (providing cessation support to patients); INT: intention to provide cessation support to patients in the near future; Model ‘Median fit’: Final optimized model identified using bootstrapped data (1000 iterations) using the median fitting data (based on χ ²): 50 % of the bootstrapped datasets fitted the model better, 50 % fitted the model worse; Model ‘95 % CI worst fit’: 97.5 % of the bootstrapped datasets fit the model better, 2.5 % fit the model worse (based on χ ²); Model ‘95 % CI best fit’: 2.5 % of the bootstrapped datasets fit the model better, 97.5 % fit the model worse (based on χ ²); The numbers in the paths between two latent constructs represent standardized parameter estimates, Covariance matrices for the three presented fits are available as Additional file 2