Health-Related Quality of Life in Older Persons with Medically Unexplained Symptoms

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Objective

Research on health-related quality of life (HRQoL) in older persons with medically unexplained symptoms (MUS) is scarce, and, in contrast with younger patients, interactions with chronic somatic diseases are more complex.

Design

In the current study we compared HRQoL between older persons with MUS and older persons with medically explained symptoms (MES). Our study sample consisted of 118 older MUS-patients and 154 older MES-patients.

Setting/Measurements

The diagnosis of MUS was ascertained by the general practitioner and confirmed by a geriatrician within a multidisciplinary diagnostic assessment. Additional characteristics, including the HRQoL (Short Form-36), were assessed during a home visit. MES-patients received two home visits to assess all measures. Multiple linear regression analyses, adjusted for age, sex, education, cognitive functioning, and psychiatric diagnoses, were performed to assess the relationship between group (MUS/MES) and HRQoL. Analyses were repeated with additional adjustments for somatization and hypochondriacal cognitions.

Results

Older patients with MUS had a significantly lower level of HRQoL compared with older patients with MES. Even after adjustments, the presence of MUS was still associated with both a lower physical and mental HRQoL. These associations disappeared, however, after additional adjustments for somatization and hypochondriacal cognitions. Within the subgroup of MUS-patients, higher levels of hypochondriac anxiety and of somatization were significantly associated with both lower physical and mental HRQoL.

Conclusions

Associations between HRQoL and late-life MUS disappear when corrected for somatization and hypochondriacal cognitions, which is in line with the DSM-5 classification of somatic symptom disorder. Appropriate psychological treatment seems needed to improve HRQoL in older MUS-patients.

Section snippets

Study Design

The Older Persons with Medically Unexplained Symptoms (OPUS) project is a large observational study aiming to explore physical, psychological, and social determinants of late-life MUS in order to develop suitable interventions for this patient group.

As part of this research project, we performed a case-control study in which we compared 118 older (>60 years) patients with chronic MUS (cases) to 154 older persons suffering from MES (comparison group). To compose a diverse research group

Sample Characteristics

Table 1 shows the patient characteristics and levels of HRQoL for older adults with MUS and MES separately. MUS-patients were significantly younger and more often female than MES-patients. Furthermore, older MUS-patients scored approximately 10 points lower on all SF-36 subscales compared with older MES-patients, except for the General Health subscale and Social Functioning subscale. In line with this, MUS-patients reported lower mental and physical HRQoL component scores than MES-patients (

Main Findings

Older persons with medically unexplained symptoms reported decreased levels of mental and physical health-related quality of life when compared with older persons with medically explained symptoms. Interestingly, these associations disappeared when additionally corrected for somatization and hypochondriacal cognitions.

Within the subgroup of older persons with MUS, levels of somatization, hypochondriacal cognitions, and the presence of a primary somatoform disorder according to DSM-IV criteria

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