An association between cancer type and delirium incidence in Japanese elderly patients: A retrospective longitudinal study.

OBJECTIVE: There is not a known elevated prevalence of delirium in older adult cancer patients. However, it is unknown if the incidence of delirium varies by cancer type among older adult patients. Therefore, this study aimed to examine the association between the incidence of delirium and cancer type among older adult patients using a Japanese hospital-based administrative claims database. METHODS: A total of 76,868 patients over 65 years of age or older, first diagnosed with cancer on an initial date of hospitalization between April 2008 and December 2019, were included in this retrospective longitudinal study. Delirium was defined by the World Health Organization's International Statistical Classification of Diseases and Related Health Problems (ICD-10) codes or antipsychotic medication use. Cox proportional hazard models were performed to estimate the risk of delirium incidence according to 22 cancer types during the one-year hospitalization period. RESULTS: The incidence rates of delirium were 17.1% for men and 15.3% for women. Compared to gastric cancer, the risk of delirium was significantly higher for pancreatic cancer (HR: 1.26, 95% CI: 1.11-1.42 for men; HR: 1.27, 95% CI: 1.11-1.45 for women), leukemia (HR: 1.24, 95% CI: 1.09-1.41 for men; HR: 1.20, 95% CI: 1.03-1.41 for women), and oropharyngeal cancer (HR: 1.30, 95% CI: 1.10-1.54 for men; HR: 1.32; 95% CI: 1.02-1.72 for women) after adjusting for age, initial hospitalization year, antipsychotic medications, and surgery. CONCLUSIONS: As compared to gastric cancer, patients with pancreatic cancer, leukemia, oropharyngeal cancer were found to have a higher risk of developing delirium. Our study findings suggested that the risk of delirium incidence may vary by cancer type.

Impaired psychomotor vigilance associated with sleep-disordered breathing in women working in the care of older adults in Japan.

PURPOSE: With a rapidly aging society, there is increasing interest in the health of female workers in the field of care services for older adults due to increasing demands to maintain 24-h care and to support older adults without errors or accidents. Therefore, the purpose of this cross-sectional study was to examine the association between sleep-disordered breathing (SDB) and sustained attention in women caring for older adults in Japan. METHODS: The study was conducted in women aged 18-67 years old working in care service facilities for older adults in Japan. The sustained attention of participants was measured by the 10-min psychomotor vigilance task (PVT). SDB was assessed based on the respiratory disturbance index (RDI), which was measured using an ambulatory airflow monitor with a polyvinylidene fluoride (PVDF) film sensor to monitor the respiratory airflow of nasal and oral breathing. The participants wore the monitor to record the breathing status while asleep at home. The severity of SDB was categorized as follows: normal, RDI < 5 events/h; mild SDB, RDI 5-10 events/h; and moderate-to-severe SDB, RDI ≥ 10 events/h. RESULTS: Of 688 women enrolled, medians of age, body mass index (BMI), sleep duration, and prevalence of hypertension tended to be higher with increasing RDI. No significant association was found between RDI and PVT parameters. However, when we limited the analysis to women with BMI ≥ 22 kg/m2, those with moderate-to-severe SDB had significantly higher odds of having the slowest 10% reaction times compared to those without SDB (OR = 2.03; 95% CI = 1.17-3.53). The association did not decrease after adjusting to account for sleep duration, alcohol drinking habits, and history of hypertension (OR = 1.97; 95% CI = 1.10-3.52). A significant increasing trend was also found between RDI and the slowest 10% of reaction times (p for trend = 0.03). CONCLUSIONS: Our findings suggest that SDB is associated with reduced sustained attention in participants with BMI ≥ 22 kg/m2, although the number of assessments of SDB and PVT was only once per participant due to the nature of the cross-sectional study.

Work-family conflict and insomnia symptoms among women working in aged care services in Japan.

OBJECTIVE: The association between work-family conflict and insomnia has not been thoroughly studied. Therefore, we sought to examine the relationship between work-family conflict and insomnia symptoms among Japanese working women. METHODS: In a cross-sectional study, 608 women aged 18-60 years old who worked in aged care services between 2015 and 2016 were selected, and 445 of these women were ultimately included. Insomnia symptoms were measured using the Athens Insomnia Scale. Work-to-family conflict (WFC) and family-to-work conflict (FWC) were assessed through a self-administered questionnaire and were divided into four categories: low work-family conflict (low WFC and FWC), high FWC, high WFC, and high work-family conflict (high WFC and FWC). The prevalence ratio (PR) and 95% confidence interval (CI) of insomnia symptoms were calculated using a Poisson regression model after multivariable adjustment. RESULTS: The multivariable-adjusted PR (95% CI) of insomnia symptoms was 1.99 (1.34-2.93) in the high work-family conflict group compared to the low work-family conflict group. CONCLUSIONS: The results from the present study suggest that insomnia symptoms are highly prevalent among working women in aged care services with high work-family conflict.

Association of employment and company size with lung cancer screening participation among Japanese based on the socioeconomic conditions using the Comprehensive Survey of Living Conditions.

BACKGROUND: The proportion of non-regularly employed persons has increased in Japan, but few studies have examined the relationship between employment status and lung cancer screening (LCS) participation. METHODS: Authors analyzed data from the 2010 Comprehensive Survey of Living Conditions in Japan. The anonymous responses of 28,951 people aged 40-69 years old were analyzed. Authors defined nine employment status categories: unemployed, regularly employed in a large-, middle-, and small-scale company, non-regularly employed in a large-, middle-, and small-scale company, self-employed, and other. LCS participation in the past year was surveyed through a self-reported questionnaire. Sex-specific prevalence ratios (PRs) and 95% confidence intervals (CIs) for LCS participation for all employment status categories, using the regularly employed in a middle-scale company category as the reference, were calculated using multivariable Poisson regression analysis, after adjusting for potentially confounding factors. RESULTS: Multivariable-adjusted PRs (95% CI) for LCS participation for the regularly employed in a large-scale company were 1.33 (1.25-1.41) in men and 1.53 (1.38-1.71) in women. Multivariable-adjusted PRs (95% CI) for LCS participation for the non-regularly employed in a middle- and small-scale company compared with the regularly employed in a middle-scale company were 0.81 (0.72-0.92) and 0.62 (0.50-0.76) in men, and 0.89 (0.80-0.99) and 0.80 (0.71-0.91) in women, respectively. CONCLUSION: Regularly employed in a large-scale company had significantly higher LCS participation, and non-regularly employed in a middle- or small-scale company showed significantly lower LCS participation than those who were regularly employed in a middle-scale company.

Association Between Employment Status and Short Sleep Duration Among Middle-Aged Japanese: the Survey on Time Use and Leisure Activities.

BACKGROUND: Short sleep duration (SSD) is reported to be highly associated with socio-economic status. There are few studies on the relationship between employment status and SSD in Japan. METHOD: The authors used the 2006 Survey on Time Use and Leisure Activities conducted by the Ministry of Internal Affairs and Communications Japan, which provides representative samples of Japanese people. The anonymous data of 120,783 people aged 30-59 years were analyzed. Authors defined five categories of employment status: "unemployed," "regularly employed," "non-regularly employed," "self-employed," and "other." Authors also defined a sleep duration shorter than 5 h per night as SSD. Multivariable-adjusted odds ratios (ORs) and 95% confidence intervals (CIs) of SSD using regular employment as the reference group were calculated using the logistic regression model, adjusting for potential confounding factors, i.e., age, marital status, education level, communication device use, and the amount of time spent on various daily activities. RESULTS: The prevalence of SSD was 2.8% (1639/58,308) in men and 3.2% (1976/62,475) in women. The multivariable-adjusted OR (95% CI) of SSD for the self-employed was 0.78 (0.65-0.92) in men and 1.78 (1.43-2.21) in women after adjustment for potential confounding factors, i.e., age, marital status, education level, and communication device use. Further adjustment for the time spent on daily activities revealed that the OR (95% CI) of SSD for the self-employed was 0.78 (0.65-0.92) in men and 1.89 (1.52-2.36) in women. CONCLUSION: Self-employed women had a higher prevalence of SSD. By contrast, self-employed men had a lower prevalence of SSD.

Association between unemployment and insomnia-related symptoms based on the Comprehensive Survey of Living Conditions: a large cross-sectional Japanese population survey.

This study examined whether employment category was associated with insomnia-related symptoms (IRS). We analyzed the 2010 Comprehensive Survey of Living Conditions in Japan. The anonymous data of 43,865 people ranging from 20-59 yr of age were analyzed. We defined six employment categories: regularly employed, non-regularly employed, self-employed, others, unemployed and not in the labor force. Sex-specific odds ratios (ORs) and 95% confidence intervals (CIs) of IRS were calculated using multivariable logistic regression analysis, adjusted for confounding factors. We further conducted stratified analyses by mental illness, smoking status, and age. For men, the multivariable ORs (95% CI) of IRS for the unemployed and those who were not in the labor force were 2.5 (1.8-3.4) and 2.1 (1.2-3.7). For women, the multivariable ORs (95% CI) for the unemployed was 1.9 (1.5-2.5). After being stratified by mental illness, we found that the associations were not significant in persons with mental illness, and were more evident in persons without mental illness. Smoking and age did not modify the associations. In conclusion, we found a significantly higher OR of IRS for the unemployed, and men who were not in the labor force. These associations were particularly more evident for individuals without mental illness.

Prevalence of sleep-disordered breathing among women working in the aged care services in Japan.

OBJECTIVES: The aim of this study was to examine the prevalence of sleep-disordered breathing (SDB) in women working in the field of aged care in Japan. METHODS: A cross-sectional study was conducted for female employees aged 18-60 years in aged care facilities in Japan. The analyzed set consisted of 712 participants with complete data. SDB was determined by respiratory disturbance index (RDI), measured using an ambulatory airflow monitor with a polyvinylidene fluoride film sensor to detect nasal and oral airflow overnight at home. Based on the findings of previous studies, RDI 10 was considered equivalent to apnea-hypopnea index (AHI) 15. RESULTS: The prevalence of moderate-to-severe SDB (RDI ≥ 10) was 22.8%. The mean age was 38.1 years, and mean sleeping time of participants was 6.1 h. The median body mass index (BMI) was 22.0. Women with moderate-to-severe SDB (RDI ≥ 10) had a higher age, neck circumference, neck-height ratio, BMI, systolic blood pressure, and increased prevalence of hypertension, short sleepers (amount of sleep on the SDB testing day < 6 h), and habitual snorers, compared to women with no or mild SDB (RDI < 10). CONCLUSIONS: Our study found that women working in the aged care services in Japan were heavily burdened by SDB even though they were relatively young and slim. To prevent CVD from developing in the future, programs through which workplaces can help their employees improve their lifestyle, and early diagnosis and treatment of SDB are highly recommended.

Developing policy regarding obstructive sleep apnea and driving among commercial drivers in the United States and Japan.

Obstructive Sleep Apnea Syndrome (OSAS) has emerged as a global public health problem. OSAS is largely recognized as a factor for increased risk of vehicular related accidents for those diagnosed and undiagnosed. This article serves as a country report that reviews current and potential policies regarding OSAS induced drowsy driving in both Japan and the United States of America. In addition to reviewing policies, various case finding techniques are also explored as methods to reduce accidents due to OSAS induced drowsy driving. Evaluation of the effectiveness of methods used in the United States of America and Japan for safe driving among commercial drivers is a key step to decreasing vehicular related accidents through stronger policy development and subsequent enforcement. Case finding has emerged as one of the most effective and realistic methods to detect OSAS in the driving population based on research done in the U.S. and Japan. Subsequently, case finding can lead to treatment to further prevent future accidents from occurring due to OSAS drowsy driving.