Different incidences of diabetic retinopathy requiring treatment since diagnosis according to the course of diabetes diagnosis: a retrospective cohort study.

We aimed to estimate the cumulative incidence of treatment-requiring diabetic retinopathy since clinical diagnosis of diabetes based on the course of diagnosis in a retrospective cohort study using Japan's medical claims and health checkup data (JMDC Claims Database; 2009-2020). We included patients whose diabetes was first diagnosed at medical facilities (hospitals/clinics). We grouped them by health checkup participation before diagnosis, health checkup results, and antidiabetic medication promptly after the diagnosis.

Out-of-pocket payment and patients' treatment choice for assisted reproductive technology by household income: a conjoint analysis using an online social research panel in Japan.

Background: Economic disparities affect access to assisted reproductive technology (ART) treatment in many countries. At the time of this survey, Japan provided partial reimbursement for ART treatment only for those in low- or middle-income classes due to limited governmental budgets. However, the optimal level of financial support by income class remains unclear.

Incidence of interventions for diabetic retinopathy and serious lower-limb complications and its related factors in patients with type 2 diabetes using a real-world large claims database.

Aims: To examine the incidence of interventions for diabetic retinopathy and serious limb complications and to elucidate the patient attributes related to the incidence of each intervention based on real-world claims data from Japan.

Materials And Methods: A retrospective longitudinal study design involving a 9 year (2009-2018) claims database obtained from the JMDC Inc. Patients with type 2 diabetes aged 20-74 years taking antidiabetic medications were divided into two groups: "patients with newly initiated antidiabetic medication" (Group 1,  = 47,201) and "patients with continuing antidiabetic medication" (Group 2,  = 82,332).

Factors associated with the degree of glycemic deterioration among patients with type 2 diabetes who dropped out of diabetes care: A longitudinal analysis using medical claims and health checkup data in Japan.

Aims/introduction: To identify factors associated with worsening glycemic control after discontinuing diabetes care among patients with type 2 diabetes.

Materials And Methods: This retrospective cohort study combined medical claims and health checkup data between January 2005 and April 2018. Adult Japanese workers with type 2 diabetes who had dropped out from diabetes care for ≥4 months after receiving ≥18 months of non-intermittent care and had health checkup information both before and after the dropout were included.

Household income and medical help-seeking for fertility problems among a representative population in Japan.

Background: Fertility treatments help many infertile couples to have children. However, disparities exist in access to fertility tests and treatments. We investigated the association between household income and medical help-seeking for fertility in Japan.

Variation in process quality measures of diabetes care by region and institution in Japan during 2015-2016: An observational study of nationwide claims data.

Aims: To calculate process quality measures of diabetes care in Japan using nationwide exclusive claims database.

Methods: Using the National Database of health insurance claims during 2015-2016, the proportions of outpatients who received recommended examinations at least annually among those with regular antidiabetic medication were calculated as quality indicators, reported altogether and by prefecture and institutional certification (from the Japan Diabetes Society). Distributions of institutional-level quality indicators were also reported.