Effect of Excessive Screen Time on Cardiorespiratory Fitness in Children: A Longitudinal Study.

BACKGROUND: This study investigated the effect of different components of screen time (mobile phone use, TV/video viewing, and video gaming) on cardiorespiratory fitness (CRF) development in children aged 9-12 years. METHODS: This was a two-year longitudinal study conducted with 175 children (49.7% girls, mean age = 9.5) in Japan. CRF was assessed using a 20 m shuttle run test conducted at baseline and again at follow-up. Children were categorized as "Good" or "Poor" based on the change in CRF scores for each gender. Screen time was assessed using a self-reported questionnaire at baseline and termed as "high" if children reported ≥ 2 h/day. Univariate and multivariate logistic regression analyses were performed after adjusting for gender, physical activity, and time of data collection. RESULTS: Children scoring "high" on mobile phone use had lower odds of being categorized as "Good" in CRF change (crude odds ratio (OR): 0.34; 95% confidence interval (CI): 0.15-0.90 (adjusted OR: 0.33; 95% CI: 0.12-0.91)). There were no significant effects of TV/video viewing (crude OR: 1.54; 95% CI: 0.84-2.81) and video gaming (crude OR: 0.98; 95% CI: 0.48-1.97) on changes in CRF. CONCLUSIONS: Limiting excessive mobile phone usage might be important for ensuring healthy development of CRF in children.

Social Network Moderates the Association between Frequency of Social Participation and Physical Function among Community-dwelling Older Adults.

OBJECTIVE: Social participation is an essential component of active aging. Physical dysfunction is restriction of social participation, but it is inconclusive that improvement of physical function contributes to promote social participation. Therefore, understanding the other factor that moderates the association between physical dysfunction and social participation is important, and social network (i.e., ties with family and friends) may be a key factor. The aims of this study were to investigate the association between physical function and frequency of social participation, with social network as a moderator, and to examine the gender differences on the relationships. METHODS: We conducted a cross-sectional study among 287 community-dwelling older adults. We asked how often they participated in social groups in a week to measure frequency of social participation. Physical function and social network were measured by using the modified version of Short Physical Performance Battery for community-dwelling older adults and the abbreviated Lubben Social Network Scale, respectively. To investigate the association, we performed a linear regression analysis. RESULTS: After adjustment, a linear regression analysis showed interactions between physical function and social network on frequent social participation (ß: -0.20, 95% confidence interval [CI]: -0.40 to -0.01). Furthermore, the same association was observed only in women (adjusted ß: -0.33, 95% CI: -0.65 to -0.02). CONCLUSION: Our results suggested that social network moderates the association between physical function and social participation, and observed gender differences on the relationships. The findings of this study indicated the importance of multidimensional assessment and measures for improving social participation, not only physical function but also social network.

Indirect effects of social activity on appetite via depressive symptoms in community-dwelling older adults: A cross-sectional study.

Depressive symptoms have a strong effect on appetite decline in older adults. There is also an association between social activity and decreased depressive symptoms, but the mechanism between appetite and social activity with respect to depressive symptoms is unclear. This cross-sectional study examined the direct and indirect effects of social activity on appetite, via depressive symptoms. A total of 259 community-dwelling older adults (mean age 75.1 ± 5.3 years; 55% female) completed the Council on Nutrition Appetite Questionnaire (CNAQ) and the 15-item version of the Geriatric Depression Scale (GDS). We used a cutoff score of 6 on the GDS-15 to determine whether participants displayed depressive symptoms. Social activity was assessed based on the number of activities participated in at least 1-3 times per month. The types of social activity consisted of local community, hobby, sports, citizen, industry, religion, volunteer, and others. Other assessed factors included age, sex, education, financial status, living situation, and comorbidities. To examine the relationships among social activity, depressive symptoms, and appetite, structural equation modeling (SEM) was used, adjusting for variables associated with depressive symptoms or appetite in multivariate analyses. SEM revealed that participation in more types of social activity had a significant indirect effect on higher appetite score via less having depressive symptoms (ß = 0.04, p = 0.018). Our findings suggest that active participation in social activities may have a positive effect on good appetite via not having depressive symptoms among older adults. Further longitudinal or intervention studies are needed to confirm our findings.

Association between sleep disturbance and low back and pelvic pain in 4-month postpartum women: A cross-sectional study.

PURPOSE: Persistent low back and pelvic pain (LBPP) is a postpartum-specific health problem. Sleep disturbances' association with persistent LBPP is not yet clear. We aimed to examine the cross-sectional association between sleep disturbance and persistent LBPP at 4 months postpartum. METHODS: We enrolled 120 women with LBPP during pregnancy (mean age, 31.8; standard deviation, 4.9 years). The primary outcome was persistent LBPP. We assessed LBPP severity at 4 months postpartum using the Numerical Rating Scale (NRS), where women with an NRS score of ≥ 4 at 4 months postpartum were allocated to the persistent LBPP group. We assessed sleep disturbance at 4 months postpartum using the Japanese version of the Pittsburgh Sleep Quality Index with a total score of ≥ 6 indicating sleep disturbance. Moreover, we performed univariate and multiple logistic regression analyses to examine the cross-sectional association of sleep disturbance with persistent LBPP. The relevant confounding variables were age, body mass index, parity, and history of LBPP before pregnancy. RESULTS: Among the 120 women, 45 women had persistent LBPP (37.5%) with 32 (71.1%) of them reporting sleep disturbance. There was a significant association of sleep disturbance with persistent LBPP (odds ratio [OR], 2.81; 95% confidence interval [95% CI], 1.28-6.19), which remained after adjustments for confounding variables (OR, 2.98; 95% CI, 1.31-6.75). CONCLUSION: Our findings indicate that sleep disturbance is associated with persistent LBPP at 4 months postpartum; therefore, it should be taken into consideration in postpartum women with persistent LBPP.

Association between comprehensive workstation and neck and upper-limb pain among office worker.

OBJECTIVES: Our study aimed to investigate the association between comprehensive workstations and neck and upper-limb pain (NUP) among office workers. METHODS: This cross-sectional study included 307 office workers (median age, 39 years; 88% men). Workstations (presence of armrest, armrest position, number of monitors used, mouse position, mouse usage, keyboard usage, and keyboard position) were investigated in terms of 17 items and judged as "adequate" or "inadequate." NUP was assessed using a numerical rating scale. NUP locations included the neck, shoulder, elbow, and wrist. In the statistical analysis, outcome variables were the presence of pain in each part, while explanatory variables were the number of inadequate workstations. Logistic regression analyses were conducted with adjustment for age, gender, working duration, and exercise habit. RESULTS: The prevalence of neck pain was 47% (n = 143), shoulder pain was 50% (n = 153), elbow pain was 7.2% (n = 22), and wrist pain was 13% (n = 40). In the adjusted model, the number of inadequate workstations had significant positive associations with elbow pain (odds ratio [OR], 1.39; 95% confidence interval [CI], 1.06.1.81) and wrist pain (OR, 1.80; 95% CI, 1.17.2.26). However, the number of inadequate workstations was not significantly associated with neck pain or shoulder pain. CONCLUSIONS: Workstation-related factors (presence of armrest, armrest position, mouse usage, and keyboard usage) were significantly associated with elbow and wrist pain. Our findings suggest that workstations can contribute to elbow and wrist pain in office workers.

Association Between Kinesiophobia and Life Space Among Community-Dwelling Older People with Chronic Musculoskeletal Pain.

OBJECTIVE: Kinesiophobia (i.e., fear of movement caused by pain) is increasingly acknowledged as a determinant of disuse among patients with chronic musculoskeletal pain. Kinesiophobia may affect life space-a crucial indicator of an active lifestyle among older people. This study aimed to investigate the previously unexamined association between kinesiophobia and life space among community-dwelling older people with chronic musculoskeletal pain. DESIGN: Cross-sectional study. SETTING: Community. SUBJECTS: We analyzed data from 194 community-dwelling older people (age ≥65 years, mean age = 75.7 years, 71.6% women) with chronic musculoskeletal pain. METHODS: Kinesiophobia, life space, and pain severity were assessed using the Tampa Scale for Kinesiophobia, Life Space Assessment, and Brief Pain Inventory. Linear regression models were applied to analyze the associations between kinesiophobia and life space, and pain severity and life space. RESULTS: In our sample, the prevalence rates for chronic musculoskeletal pain were 10.82% (N = 21) for neck, 55.15% (N = 107) for lower back, 25.26% (N = 49) for shoulder, and 50.00% (N = 97) for knee. The results suggest that higher kinesiophobia is associated with smaller life space (adjusted beta = -0.91, 95% CI = -1.43 to -0.45, P < 0.001), even after adjustment for age, gender, years of education, pain severity, and presence of comorbidity. On the contrary, no significant association between pain severity and life space was observed (adjusted beta = -0.61, 95% CI = -2.92 to 1.72, P = 0.624). CONCLUSIONS: Our findings suggest that kinesiophobia plays an important role in the determination of life space among older people with chronic musculoskeletal pain.

Association Between Excessive Weight Gain During Pregnancy and Persistent Low Back and Pelvic Pain After Delivery.

STUDY DESIGN: Retrospective study. OBJECTIVE: To investigate the association between gestational weight gain (GWG) during pregnancy and persistent low back and pelvic pain (LBPP) after delivery. SUMMARY OF BACKGROUND DATA: Persistent LBPP after delivery is a risk factor for developing depression and chronic pain as well as incurring sick leave. Women experience weight gain during pregnancy. Excessive weight gain places a greater burden on the musculoskeletal system. However, little is known about how GWG is associated with LBPP after delivery. METHODS: After Ethics Committee approval, we analyzed 330 women at 4 months after delivery who had LBPP during pregnancy. The exclusion criteria were as follows: specific low back pain, multiple birth, and incomplete data. Four months after delivery, LBPP was assessed using a self-report questionnaire. Persistent LBPP was defined as pain at 4 months after delivery with an onset during pregnancy or within 3 weeks after delivery. GWG was calculated as the difference between the pregnancy weight and the prepregnancy weight, which we categorized into three groups: <10, 10 to <15, and ≥15 kg. Other confounding factors including age, height, weight at 4 months after delivery, parity, gestational week, mode of delivery, weight of the fetus, and prepregnancy LBPP were assessed. We used logistic regression analysis to calculate LBPP odds ratios (ORs) according to GWG. RESULTS: The prevalence of persistent LBPP was 34.1% (n = 113). Compared with women with a GWG of <10 kg, women with a GWG of ≥15 kg had a higher prevalence of persistent LBPP (OR = 2.77, 95% confidence interval (95% CI) = 1.28-5.96, adjusted OR = 2.35, 95% CI = 1.06-5.21); however, no significant difference was found for women with a GWG of 10 to <15 kg (OR = 1.18, 95% CI = 0.72-1.92, adjusted OR = 1.02, 95% CI = 0.61-1.72). CONCLUSIONS: Our study showed that excessive weight gain during pregnancy is one of the risk factors of persistent LBPP. Appropriate weight control during pregnancy could help prevent persistent LBPP after delivery. LEVEL OF EVIDENCE: 3.

Impact of loss of independence in basic activities of daily living on caregiver burden in patients with Alzheimer's disease: A retrospective cohort study.

AIM: To investigate the association between decline of basic activities of daily living (ADL) in each dimension and change in caregiver burden in patients with mild-to-moderate Alzheimer's disease. METHODS: This retrospective study included 117 outpatients with Alzheimer's disease who presented to the Memory Clinic at the National Center for Geriatrics and Gerontology in Japan between September 2010 and April 2014 (mean age 77.3 ± 6.4 years; 68.6% women). Patients and their caregivers completed comprehensive geriatric assessment at baseline and at the 3-year follow up. Caregiver burden was assessed using the Japanese version of the Zarit Burden Interview. ADL were assessed by the Barthel Index. Among patients with full points on each subitem of the Barthel Index at baseline, incident ADL decline was defined as a loss of at least 5 points at the 3-year follow up. Other confounding factors including demographic data, cognitive function, vitality, and behavioral and psychiatric symptoms of dementia were also assessed. The longitudinal relationship between incident ADL decline and changes in caregiver burden was evaluated by multivariate linear regression, adjusted for confounding variables. RESULTS: In descending order, declines in ADL at 3 years were noted in bathing (25.4%), bowel control (25.4%), grooming (22.9%) and bladder control (22.9%). On multivariate analyses, ADL declines in feeding (b = 17.2, P < 0.01) and bathing (b = 11.0, P = 0.02) were significantly associated with increased caregiver burden. CONCLUSION: Incident ADL declines in feeding and bathing are significant risk factors for increased caregiver burden in patients with Alzheimer's disease. Geriatr Gerontol Int 2019; 19: 1243-1247.