Objective: Neurotrophin-like brain-derived neurotrophic factor (BDNF) and pro-inflammatory cytokines may modulate the pathophysiology of mood disorders. Although several studies show alterations in these biomarkers during the depressive, manic, and euthymic states of mood disorders, evidence is lacking for those in a mixed state. Therefore, this study aimed to investigate the relationship between the depressive mixed state (DMX) and peripheral neurobiological factors. Methods: We enrolled 136 patients with major depressive episodes. Depressive symptoms were assessed using the Quick Inventory of Depressive Symptomatology Self-Report Japanese version (QIDS-SR-J). The severity of DMX was assessed using the self-administered 12-item questionnaire (DMX-12). Categorical screening as DMX-positive (n=54) was determined by a cutoff score of 13 or more in the specific eight symptoms from the DMX-12; the remaining were DMX-negative (n=82). Serum BDNF, tumor necrosis factor-α, highsensitivity C-reactive protein, and interleukin-6 levels were measured. Results: When comparing biomarkers between the DMX-positive and DMX-negative groups, higher serum BDNF concentration in the DMX-positive group than in the DMX-negative group was the only significant finding (p=0.009). A positive correlation existed between the total score of the eight specific symptoms of DMX-12 and the BDNF concentration (r=0.190, p=0.027). After adjustment for confounders, logistic regression analysis revealed that BDNF (odds ratio [OR]=1.07, 95% confidence interval [CI]=1.00–1.14, p=0.045), bipolar diagnosis (OR=3.43, 95% CI=1.36–8.66, p=0.009), and total QIDS-SR-J score (OR=1.29, 95% CI=1.15–1.43, p<0.001) were significantly associated with DMX positivity. Conclusion BDNF was positively associated with DMX severity, suggesting that higher BDNF concentrations may be involved in the pathophysiology of DMX.

Background: Lumbar spinal stenosis (LSS) impairs activities of daily living (ADL) in older adults. Factors associated with ADL impairment in LSS have not been identified. This study aimed to ascertain the pre-admission living conditions in older adults with LSS and investigate the factors associated with impairment in ADL. Methods: A total of 261 community-dwelling older adults aged ≥65 years with LSS, scheduled for surgery were included. The Oswestry Disability Index (ODI) was used to assess ADL impairment. The Life-Space Assessment was used to assess the extent and frequency of outings. Pain, numbness, continuous walking distance, and health-related quality of life as psychosomatic functions. Falls self-efficacy and the degree of social isolation were assessed as social life status. Factors associated with ADL impairment were examined using multiple logistic regression analysis. Results: Significant differences were found in psychosomatic functioning, living space, and falls self-efficacy depending on the presence or absence of ADL impairment. The ODI sub-components showed a stronger degree of impairment in pain intensity, walking, standing, and social life. There were significant differences in the frequency of going outside the home and inside the neighborhood, ADL impairment was shown to affect the frequency of outings within close proximity to their lives. Numbness was associated with ADL impairment (odds ratio=1.2; 95% confidence interval 1.1–1.4). Conclusion Assessing the degree of numbness is important in predicting ADL impairment in older adults with LSS. Additionally, assessing the living conditions and taking an appropriate approach before admission can help prevent ADL impairment.

Background: Lumbar spinal stenosis (LSS) impairs activities of daily living (ADL) in older adults. Factors associated with ADL impairment in LSS have not been identified. This study aimed to ascertain the pre-admission living conditions in older adults with LSS and investigate the factors associated with impairment in ADL. Methods: A total of 261 community-dwelling older adults aged ≥65 years with LSS, scheduled for surgery were included. The Oswestry Disability Index (ODI) was used to assess ADL impairment. The Life-Space Assessment was used to assess the extent and frequency of outings. Pain, numbness, continuous walking distance, and health-related quality of life as psychosomatic functions. Falls self-efficacy and the degree of social isolation were assessed as social life status. Factors associated with ADL impairment were examined using multiple logistic regression analysis. Results: Significant differences were found in psychosomatic functioning, living space, and falls self-efficacy depending on the presence or absence of ADL impairment. The ODI sub-components showed a stronger degree of impairment in pain intensity, walking, standing, and social life. There were significant differences in the frequency of going outside the home and inside the neighborhood, ADL impairment was shown to affect the frequency of outings within close proximity to their lives. Numbness was associated with ADL impairment (odds ratio=1.2; 95% confidence interval 1.1–1.4). Conclusion Assessing the degree of numbness is important in predicting ADL impairment in older adults with LSS. Additionally, assessing the living conditions and taking an appropriate approach before admission can help prevent ADL impairment.

Background: Lumbar spinal stenosis (LSS) impairs activities of daily living (ADL) in older adults. Factors associated with ADL impairment in LSS have not been identified. This study aimed to ascertain the pre-admission living conditions in older adults with LSS and investigate the factors associated with impairment in ADL. Methods: A total of 261 community-dwelling older adults aged ≥65 years with LSS, scheduled for surgery were included. The Oswestry Disability Index (ODI) was used to assess ADL impairment. The Life-Space Assessment was used to assess the extent and frequency of outings. Pain, numbness, continuous walking distance, and health-related quality of life as psychosomatic functions. Falls self-efficacy and the degree of social isolation were assessed as social life status. Factors associated with ADL impairment were examined using multiple logistic regression analysis. Results: Significant differences were found in psychosomatic functioning, living space, and falls self-efficacy depending on the presence or absence of ADL impairment. The ODI sub-components showed a stronger degree of impairment in pain intensity, walking, standing, and social life. There were significant differences in the frequency of going outside the home and inside the neighborhood, ADL impairment was shown to affect the frequency of outings within close proximity to their lives. Numbness was associated with ADL impairment (odds ratio=1.2; 95% confidence interval 1.1–1.4). Conclusion Assessing the degree of numbness is important in predicting ADL impairment in older adults with LSS. Additionally, assessing the living conditions and taking an appropriate approach before admission can help prevent ADL impairment.