Table 2 Psychometric properties of the five domains. # min and # max represents the number and proportion of patients responding with either the lowest (0) or highest (3) possible score in each domain. Cronbach’s alpha measures the average correlation among items within a test, indicating how well they measure the same underlying construct. The values range from 0 to 1, with higher values indicating better internal consistency. The total reliability coefficient (TRC) is an overarching measure of reliability, encompassing various sources of error variance. Higher values indicate better reliability. The goodness-of-fit index (GFI) compares the fit of the specified model to that of a null model (one with no relationships among variables). The values range from 0 to 1, with higher values indicating a better fit. The root mean square error of approximation (RMSEA) measures how well the model approximates the population covariance matrix per degree of freedom. Lower values indicate a better fit. The standardized root mean squared residual (SRMR) is a measure of the difference between observed and predicted correlations. The values range from 0 to 1, with lower values indicating a better fit. The comparative fit index (CFI) compares the fit of the specified model to an independent (null) model. The values range from 0 to 1, with higher values indicating a better fit

From: Development of a PROM to measure patient-centredness in chronic care consultations in primary care