“…Similarly, in a recent population survey of more than 5000 Swedish adolescents, Type D was associated with higher levels of self-reported psychosomatic symptoms, musculoskeletal pain, and sleep disturbance (Condén, Leppert, Ekselius, & Åslund, 2013;Condén, Rosenblad, Ekselius, & Aslund, 2014). Other somatic research has found that negative affectivity and social inhibition are also each independently associated with increased somatization and unexplained symptoms (Watson & Pennebaker, 1989;Wongpakaran & Wongpakaran, 2014). Because, even in healthy populations, Type D personality is associated with somatic complaints and exaggerated symptom reporting, we hypothesize that functional somatic syndromes, conditions that are characterized primarily by general somatic complaints of unclear etiology, such as chronic fatigue syndrome or fibromyalgia, may be more susceptible to the effects of Type D personality than illnesses of known etiology such as type 2 diabetes or arthritis.…”