The efficacy of heart rate variability biofeedback training on sleep disorders and impact of fibromyalgia: Results of a phase II randomized controlled trial.

OBJECTIVE: Fibromyalgia syndrome (FMs) is a chronic, musculoskeletal pain disorder characterized by sleep disturbances, fatigue, and cognitive dysfunction. Heart rate variability biofeedback (HRV-BF) aiming to improve self-regulation and strengthen the parasympathetic nervous system has been shown to be effective in several pain syndromes, but its efficacy in FMs has not been adequately investigated. This Phase II trial aimed to assess the feasibility and preliminary measurement of the improvement induced by HRV-BF in FMs. METHODS: Sixty-four patients with FMs were recruited. Patients were randomly assigned to either the experimental group (EG) or the control group (CG). The EG received 10 HRV-BF training sessions in addition to pharmacological standard therapy. The CG received standard therapies for 10 weeks. The FMs impact on daily life, sleep regularity, sense of coherence, depression symptoms and pain has been assessed as primary outcomes, quality of life as secondary. RESULT: 23 (71.9%) of EG patients completed the intervention and 20 (62.5%) of the CG were re-evaluated at time T1. No side effects were reported. It was not found any statistical differences between groups over time in primary and secondary outcomes. CONCLUSIONS: The HRV-BF intervention did not demonstrate efficacy in both primary and secondary outcomes. However, it is quite feasible in terms of drop-out rate and side effects. Further studies with larger sample sizes are needed to determine its actual efficacy. CLINICALTRIALS: gov with code: NCT04121832.

Megacities, migration and an evolutionary approach to bipolar disorder: a study of Sardinian immigrants in Latin America

Objective: To determine whether people with a Sardinian genetic background who live in the megacities of South America have a higher frequency of hypomania than residents of Sardinia. Methods: A community survey of Sardinian immigrants was carried out in four Brazilian metropoles (n=218) and Buenos Aires (n=306). The results were compared with those of a study involving a similar methodology (Mood Disorder Questionnaire [MDQ] as a screening tool) conducted in seven Italian regions, including a sub-sample from Sardinia. Results: There was a higher prevalence of lifetime hypomania among Sardinians living in the Brazilian metropoles than among those living in Sardinia. This result was also consistent with Sardinian immigrants in Buenos Aires. After stratification by sex and age, the lifetime prevalence of MDQ scores ≥ 8 among Sardinians in South-American megacities and Sardinia was 8.6% vs. 2.9%, respectively (p < 0.0001). Conclusions: The higher frequency of hypomania in migrant populations appears to favor an evolutionary view in which mood disorders may be a maladaptive aspect of a genetic background with adaptive characteristics.

Megacities, migration and an evolutionary approach to bipolar disorder: a study of Sardinian immigrants in Latin America.

OBJECTIVE: To determine whether people with a Sardinian genetic background who live in the megacities of South America have a higher frequency of hypomania than residents of Sardinia. METHODS: A community survey of Sardinian immigrants was carried out in four Brazilian metropoles (n=218) and Buenos Aires (n=306). The results were compared with those of a study involving a similar methodology (Mood Disorder Questionnaire [MDQ] as a screening tool) conducted in seven Italian regions, including a sub-sample from Sardinia. RESULTS: There was a higher prevalence of lifetime hypomania among Sardinians living in the Brazilian metropoles than among those living in Sardinia. This result was also consistent with Sardinian immigrants in Buenos Aires. After stratification by sex and age, the lifetime prevalence of MDQ scores ≥ 8 among Sardinians in South-American megacities and Sardinia was 8.6% vs. 2.9%, respectively (p < 0.0001). CONCLUSIONS: The higher frequency of hypomania in migrant populations appears to favor an evolutionary view in which mood disorders may be a maladaptive aspect of a genetic background with adaptive characteristics.

BEEP-Bodily and Emotional Perception of Pain. A Questionnaire to Measure Reaction to Pain in Chronic Pain Disorders.

Background: The assessment of pain and its impact on quality of life is central to the evaluation of chronic pain syndromes. However, most available tools focus on the nociceptive experience of pain, and at best only consider the occurrence of anxious, depressive, or cognitive problems. Here is a new questionnaire aimed at measuring the multifaceted impact of pain in chronic pain syndromes, the Bodily and Emotional pErception of Pain (BEEP). Methods: All consecutive patients who accessed a center for the treatment of pain were invited to take part in the study. The sample included 222 participants (51 with fibromyalgia, 84 with low back pain; 87 with other chronic pain syndromes). Women were 77% of the sample, the mean age was 61 ± 15. Participants completed the BEEP, the Patient Health Questionnaire-9 (PHQ-9), and the Mood Disorder Questionnaire (MDQ). Results: Reliability was good for all questionnaires. The expected three dimensions of the BEEP were confirmed by confirmatory factor analysis, and a bifactor model with three orthogonal factors showed a good fit as well. Participants diagnosed with fibromyalgia showed higher scores on the BEEP than the participants who had been diagnosed with low back pain or other chronic pain syndromes. The prevalence of probable cases of major depression and bipolar disorder in the sample was higher than expected for non-clinical samples. Levels of depression, as measured by the PHQ-9, were associated with the three dimensions of the BEEP and with the intensity of pain. Conclusions: The BEEP is a promising measure of the impact of pain in daily life and differentiates fibromyalgia from other chronic pain syndromes. The BEEP may be helpful to evaluate the patient's response to the treatment over time and may favor the identification of unmet needs in patients' personal, social, and daily functioning.