Major depressive disorder (MDD) is a mood disorder commonly noted by mental health clinicians. The DSM-IV TR diagnosis involves two weeks of either depressed mood or anhedonia and four symptoms concerning altered sleep, appetite, energy, weight and movement and disturbed thoughts involving guilt, worthlessness, indecisiveness and suicide (Butcher, Mineka & Hooley, 2007).
Current empirical evidence indicates MDD symptoms expressed in younger adults (YA’s) and older adults (OA’s) do overlap, but primarily each group expresses MDD differently. The presentation characteristic of YA’s closely reflects the DSM-IV diagnostic criteria, whereas the symptoms featuring in OA MDD perhaps more closely relate to a sub-syndromal form of DSM-IV depression.
While both YA and OA experience anhedonia (emotional numbness) or sadness, symptoms pivotal to MDD, YA report them more readily. Balsis and Cully (2008) noted anhedonia was significantly more prominent in YA’s than OA’s and Bogner and Gallo (2004) found anhedonia the most commonly reported MDD symptom in YA’s. Goldberg et al. (2002) observed YA’s endorsed more sadness-related symptoms (crying) than OA’s, while Heun, Kockler and Papassotiropouls (2000) found anhedonia and sadness featured prominently in depressed YA’s. However, the presence of depressed mood has been observed in OA’s with MDD as well (Kockler & Heun, 2002; McCusker et al., 2005). The greater prevalence of sadness and anhedonia in YAs compared to OAs suggests younger individuals are more comfortable discussing psychological symptoms, and differences in MDD’s presentation across the two age groups.
Younger adults also appear to experience cognitive/affective symptoms encompassing failure, self-loathing and self-criticism (Goldberg et al., 2002), worthlessness, guilt and suicidal thoughts (Balsis & Cully, 2008; Goldberg et al). Both Goldberg et al. and Bogner and Gallo (2004) noted YAs endorsed somatic symptoms during MDD such as disturbed sleep and appetite habits.
Contrasting YAs, OAs experience of MDD tends to manifest somatically. Evers and Marin (2002) noted OA’s with MDD less frequently report classic symptoms of sadness, poor self-esteem and self-loathing. Rather, OA MDD tends to involve loss of interest and somatic symptoms concerning altered appetite, sleep and weight patterns. OAs endorsed significantly fewer DSM-IV MDD symptoms than YA’s (Balsis & Cully, 2008). Somatic disturbances including changed weight, appetite, energy and sleep has been observed in community (Kockler & Heun, 2002; Balsis & Cully) and medical inpatient (McCusker et al., 2005) populations. While suicidal ideation is rarer in OA MDD, suicide attempts seem more lethal in this population (Van Exel, Stek, Deeg & Beekman, 2000). The predominantly somatic manifestation of MDD in OA creates diagnostic difficulties, as the features may reflect or be mistakenly attributed to alternative illnesses.
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