Although body mass is known to be related to bone mass, defined as bone mineral density (BMD) and bone mineral content (BMC), little is known about the effects of body mass reduction programs on bone mass. This study assessed bone mass changes in response to four body mass reduction programs that utilized diet and/or exercise. Ninety-four obese or overweight women (age 49.3±7.1 years, body mass 68.5±7.7 kg) were randomly assigned 4 groups (2 intervention forms × 2 trials) : diet in trial 1 (D₁, n=27), diet plus exercise in trial 1 (DE₁, n=28), diet in trial 2 (D₂, n=21), and diet plus exercise in trial 2 (DE₂, n=18) . Body mass, body mass index (BMI), absolute and relative (%fat) fat mass, lean mass, BMC, and BMD were measured by dual energy X-ray absorptiometry before and after the 3-month intervention program. Body mass loss was similar in DI (-9.7%) and D₂ (-11.6%), and in DE₁ (-13.8%) and DE₂ (-12.2%) . However, BMC loss was different (P<0.05) between trial 1 and trial 2 for each intervention form (D₁: -3.2% vs D₂ ; -0.9%, DE₁: -4.5% vs DE₂: -0.8%) . With this in mind, multiple regression analyses were applied, with either change in BMC or BMD as the dependent variable, and other physical characteristics measured before and after the intervention program as independent variables. Results indicated that multiple correlation coefficients were statistically significant (R=0.61 with BMC, R=0.49 with BMD) . BMI after the intervention program and change in body mass were identified as the significant contributors to the change in BMC, while change in %fat and age were identified as the significant contributors to the change in BMD. These results suggest that, during body mass reduction, (1) physical characteristics are the significant contributors to changes in BMC and BMD and (2) exercise may not prevent the loss of bone mass.

Introduction: This study examined the effectiveness of the modified Hospital Elder Life Program (HELP) for preventing delirium, which was adjusted to be used in acute internal medicine wards at general community hospitals in Japan.Methods: The pre-intervention group consisted of 751 patients aged 70 years or older hospitalized at Nishiyodo Hospital and Amagasaki Medical Co-op Hospital between January and July 2013. The post-intervention group consisted of 775 patients aged 70 years or older hospitalized between March and July 2017 and between October and December 2017. To address risk factors for delirium, a multicomponent intervention (modified HELP) consisting of the following was implemented: handing out pamphlets, orientation to maintain activity levels, sleep improvement, early initiation of rehabilitation, provision of glasses, hearing aids, and dentures, and the termination of continuous intravenous infusion. The Delirium Screening Tool was used to calculate the percentage of inpatients who developed delirium.Results: Of the 751 patients in the pre-intervention group, 108 (14.4%) developed delirium and 88 (11.4%) of the 775 patients in the post-intervention group exhibited delirium (odds ratio: 0.70; 95% confidence interval: 0.48-1.01; p=0.06).Conclusion: The modified HELP, adjusted for use in Japan, did not significantly reduce the rate of delirium during hospitalization. Therefore, a more universal intervention method is needed in the future.