Do labels matter? Implications of ongoing symptomatic chronic illnesses labeled as conventional diagnoses vs. functional somatic syndromes

A consideration of chronic illness according to illness labels that are medically understood as opposed to being outside of medical understanding may reveal unique differences in how individuals understand their illness and how such lay understandings relate to health-related quality of life. Study aims are framed according to the commonsense model of self-regulation with a focus on characterizing illness representations according to chronic illness diagnosis type.Individuals suffering from symptomatic chronic illnesses (n = 192) completed measures of illness representations, coping, and general health. Participants were categorized into one of two groups based on reported diagnosis/symptoms: (a) conventional diagnosis (CD) or (b) functional somatic syndrome (FSS).FSS participants reported lower illness coherence and greater illness identity than CD participants. Overall, illness coherence predicted negative coping which mediated the relationship between illness coherence and general health.Minimal differences were found in illness representations across FSS and CD groups with distinctions found only for illness coherence and identity. Illness coherence stands out as particularly important for coping and health-related quality of life for individuals with ongoing symptoms. Healthcare professionals should work carefully with chronically ill populations to address potential impacts of illness coherence, especially among FSS patients.