LAUSR

OBJECTIVE General practitioners (GPs) disclose more uncertainty (e.g. "I don't know") in consultations with patients presenting medically unexplained symptoms (MUS) versus medically explained symptoms (MES), which could negatively affect patient outcomes. This study assessed if this pattern also holds for more subtle, implicit uncertainty expressions (e.g. "maybe", "might") during different consultation phases, and assessed their relation to patient pre-post consultation anxiety. METHODS We quantified implicit markers of uncertainty of 18 GPs in 82 consultations about MUS or MES during different consultation phases. Relative frequencies of implicit uncertainty per consultation were regressed on differences in momentary anxiety pre and post consultation. RESULTS We coded 2590  GP utterances. Uncertainty expressions were more frequent in MUS versus MES consultations (OR = 1.54, p = .004), especially during diagnosis and treatment recommendations compared to physical examinations (OR =0 .45, p = .001). Implicit uncertainty was not related to patients' changes in anxiety (b = -0.11, p = .817). CONCLUSIONS GPs express more uncertainty during MUS (versus MES) consultations, especially during the diagnostic phase and treatment recommendations. This does not necessarily affect patient anxiety. PRACTICE IMPLICATIONS Implicit uncertainty expressions reflect the mere complexity of communicating a medically unexplained diagnosis, which does not affect patient anxiety.