Exploring maladaptive cognitions and behaviors as perpetuating factors in patients with persistent somatic symptoms: a longitudinal study.

OBJECTIVE: Maladaptive cognitions and behaviors may influence symptoms and impairment in patients with persistent somatic symptoms (PSS). Aims of this study were to examine: (i) whether maladaptive cognitions and behaviors are associated with symptom severity and functional health over time; (ii) if these associations are the result of changes within individuals over time or of differences between individuals; (iii) directions of changes within individuals over time. METHODS: Longitudinal data of a heterogeneous sample of patients with PSS were analyzed (n = 322 patients enrolled in the PROSPECTS cohort study). Cognitive and behavioral responses to symptoms (CBRQ), symptom severity (PHQ-15) and physical and mental functioning (RAND-36 PCS and MCS) were assessed seven times over a five-year period (0, 6 months, 1, 2, 3, 4, 5 year). Longitudinal mixed model and hybrid model analysis with and without time-lag were applied. RESULTS: Maladaptive cognitions and behaviors were associated with more severe symptoms and reduced physical and mental functioning over time. Both changes within individuals over time and differences between individuals were associated with higher symptom severity and reduced physical and mental functioning. The between-subject component was about twice the effect size of the within-subject component. Changes in several specific maladaptive cognitions and behaviors were associated with more severe symptoms and reduced physical and mental functioning later in time and vice versa. CONCLUSION: This study shows that maladaptive cognitions and behaviors are associated with symptom severity and reduced physical and mental functioning over time in patients with PSS.

Lost in fragmentation - care coordination when somatic symptoms persist: a qualitative study of patients' experiences.

BACKGROUND: GPs can play a central role in the care of patients with persistent somatic symptoms (PSS). To date, little is known about these patients' experiences relating to their coordination of care. AIM: To explore the experiences of patients with PSS relating to coordination of care - in particular by their GP - during their illness trajectory. DESIGN AND SETTING: This qualitative study was carried out from January to April 2019 in the Netherlands as part of a multicentre prospective cohort study on the course of PSS (PROSPECTS). METHOD: Thematic content analysis of 15 interviews. RESULTS: Three themes were identified: care fragmentation during the diagnostic trajectory; transition from the search for a cure to coping; and reframing to coping: GPs' role in facilitating supportive care. Patients experienced a lack of collaboration from healthcare workers during the diagnostic trajectory. Guidance by their GP in a process of shared decision making was positively valued by patients. Moving the focus from searching for a cure to coping with symptoms was described as a 'personal endeavour', made even more challenging by the ongoing uncertainty experienced by patients. When reframing to coping, the extent to which patients felt aligned with their GP played an important role in whether their supportive care request was met. CONCLUSION: Patients experienced difficulties when navigating the diagnostic trajectory and shifting to coping. The findings of this study underline the importance of collaboration between GPs and other healthcare professionals during the diagnostic trajectory. The authors recommend that GPs provide proactive guidance and are sensitive to patients who shift to coping by providing them with supportive care in a process of shared decision making.

Head-to-head comparison of somatic symptom scales: The Patient Health Questionnaire (PHQ-15) and the somatization scale of the Four-Dimensional Symptom Questionnaire (4DSQ-S).

OBJECTIVE: The goal of this study was to compare the 15-item Patient Health Questionnaire (PHQ-15) and the somatization subscale of the Four-Dimensional Symptoms Questionnaire (4DSQ-S) with respect to their latent structure and reliability, and to examine whether their scores are affected by age and gender, and whether the scales measure the same construct(s). METHODS: The study population consisted of individuals with a tendency to experience persistent somatic symptoms, recruited in multiple healthcare settings, who completed the PHQ-15 and 4DSQ-S concurrently. We analyzed the scales' latent factor structure using confirmatory factor analysis (CFA), the scales' reliability, and differential item functioning (DIF) due to age and gender. We performed a head-to-head comparison by fitting structural equation models of the questionnaires' factors. RESULTS: We included 234 participants. CFA showed that both questionnaires fitted a bifactor model with a general factor and four specific factors, three of which (labeled "musculoskeletal", "gastrointestinal", and "cardiopulmonary") were substantively similar. Both scales were essentially unidimensional. The reliability of the PHQ-15 and 4DSQ-S was equally high (omega 0.933 and 0.942, respectively). DIF-analysis showed minor DIF for age in one item of each questionnaire, with negligible impact on the scale score. Head-to-head comparison showed that the PHQ-15 and 4DSQ-S measured the same constructs. We present PHQ-15 - 4DSQ-S cross-walk tables. CONCLUSIONS: Both questionnaires mainly measure a single somatic symptom burden dimension of which all symptoms (covered by the questionnaires) are adequate indicators. They do so equally accurately and they behave the same across gender and age categories.

Potentially traumatic events, social support and burden of persistent somatic symptoms: A longitudinal study.

OBJECTIVE: Psychological trauma is a well-known risk factor for the onset of persistent somatic symptoms (PSS). In contrast, little is known on the relation between potentially traumatic events (PTEs) and the severity of PSS, and on the protective effect of social support. We aimed to: (i) determine whether childhood, adulthood and recent PTEs are associated with burden of PSS over four years of follow-up; (ii) examine associations of multiple and cumulative (in childhood and adulthood) exposure to PTEs with burden of PSS; and (iii) determine whether social support modifies these associations. METHODS: Longitudinal data of 322 patients with PSS were analyzed. PTEs (Life Events Questionnaire) and social support (Social Support Scale) were assessed at baseline. Burden of PSS was measured in terms of symptom severity (PHQ-15) and physical functioning (RAND-36 PCS) at six repeated measurements over a four-year interval. Associations were analyzed using longitudinal mixed model analysis. RESULTS: Patients with multiple childhood PTEs reported higher burden of PSS over four-year time. Adulthood PTEs were associated with burden of PSS in patients with, but not in patients without childhood PTEs. Recent PTEs were not associated with burden over time. Social support did not modify any of the associations. CONCLUSIONS: PTEs are associated with higher burden of PSS over time, in addition to the well-known association with the onset of PSS. PTEs in early life and cumulative exposure to PTEs in childhood and adulthood are associated with higher burden over time in patients with PSS. Social support did not attenuate the associations.

Patients' experiences with fluctuations in persistent physical symptoms: a qualitative study.

OBJECTIVES: To explore patients' experiences with fluctuations in persistent physical symptoms (PPS) and to understand which factors-from their viewpoint-play a role in these fluctuations. DESIGN: Qualitative study using semistructured interviews and thematic content analysis. SETTING: This qualitative study is part of a multicentre prospective cohort study on the course of PPS. Patients were recruited in general practices and specialised treatment facilities for PPS throughout the Netherlands. PARTICIPANTS: Interviews were conducted with a sample of fifteen patients with PPS to explore their experiences with fluctuations in symptom severity. RESULTS: We identified three themes in the analysis: (1) patterns in symptom fluctuations (2) perceived causes of symptom exacerbations and (3) Patients' strategies in gaining control over symptom exacerbations. Daily and weekly fluctuations in symptoms were an important element in patients' experiences. In particular anticipating on the worsening of symptoms impacted their daily routines and posed various challenges. Symptom exacerbations were attributed to overstepping physical limits and/or the impact of negative emotions. Resigning to physical limits, adjusting ones daily planning, weighing personal needs and learning to say 'no' were described as different strategies in gaining control over symptom exacerbations. CONCLUSIONS: Fluctuations in the severity of symptoms-and in particular daily and weekly symptom exacerbations-are an important element of the symptom experience in patients with PPS and poses various challenges. Patients attributed symptom exacerbation to overstepping physical limits and/or negative emotions. Patients described different strategies in gaining control over symptom exacerbations.

Impact of symptom focusing and somatosensory amplification on persistent physical symptoms: A three-year follow-up study.

OBJECTIVE: The somatosensory amplification theory considers symptom focusing and somatosensory amplification as important perpetuating factors of persistent physical symptoms. We investigated whether symptom focusing and somatosensory amplification were associated with symptom severity and mental and physical functioning over a three-year period in patients with persistent physical symptoms (PPS). METHODS: Baseline, 6-, 12-, 24- and 36-months follow-up data from the PROSPECTS study, a prospective cohort consisting of 325 patients with PPS, were used. We applied longitudinal mixed model analyses to investigate if symptom focusing (CBRQ Symptom Focusing Subscale) and somatosensory amplification (Somatosensory Amplification Scale) at baseline were associated with symptom severity (PHQ-15), mental and physical functioning (RAND-36 MCS and PCS) over three years, using all measurements. RESULTS: Symptom focusing was associated with increased symptom severity and lower mental and physical functioning over time. Somatosensory amplification at baseline was associated with increased symptom severity and lower mental and physical functioning over time. Effect sizes were small. Associations with baseline symptom focusing decreased over time, associations with baseline somatosensory amplification were more stable. There was no interaction effect of both constructs, but they partly overlapped. CONCLUSION: This is the first study to show that over an extended period, symptom focusing and somatosensory amplification are associated with symptom severity and lower mental and physical functioning in patients with PPS. These results support the impact of both symptom focusing and somatosensory amplification on the perpetuation of symptoms and lowered mental and physical functioning in individuals with PPS.