89 Patient cost-sharing, mental health care and inequalities APPENDIX B. DATA SOURCES Municipal registries GBAPERSOONTAB and GBAADRESOBJECTBUS are datasets obtained from the Dutch municipal basic administration person file (Basis Registratie Personen). GBAPERSOONTAB contains information on residents of the Netherlands and their sociodemographic characteristics at any point since 1995 and GBAADRESOBJECTBUS provides longitudinal data on the addresses of individuals. We combine GBAPERSOONTAB 2009 and GBAADRESOBJECTBUS 1995-2020 to identify individuals born between 1990 and 1997 who lived in the Netherlands during 2009. From these datasets we obtain information on gender, month and year of birth, migratory background and two-digit postcode of individuals´ home address (time-variant). We define migratory background according to the classification done by Statistics Netherlands. Individuals are classified as Dutch (natives) if the individual and both parents are born in the Netherlands. First generation migrants are classified according to their country of birth. Second generation migrants are classified according the country of birth of their mother. In case the mother was born in the Netherlands, the country of birth of the father is considered. We group the countries with less than residual number of observations in the category ´Other´. The two-digit postcode of home address is obtained for each year in the study period by isolating the first two letters of the complete postcode of four letters and two numbers. When individuals moved during the calendar year, the home address where they spent a longer period is considered. Health insurance claims – expenditure The dataset ZVWZORGKOSTENTAB corresponds to health insurance claims that record all the reimbursements by health insurers within the standard benefit insurance package, including care provided under the deductible but excluding other forms of out-of-pocket payments. Data includes total annual expenditure for each one of sixteen categories of health care, including specialist mental health services and basic mental health services. Based on the expenditures for the years of 2009 to 2014 we define whether each individual used any basic or specialist mental health services in each calendar year. Specialist mental health care is provided and reimbursed under a case-mix system: the ‘diagnosis treatment combinations’, also known as DBCs (Diagnose Behandeling Combinatie). A treatment record is opened by providers for each patient, possibly lasting up to one year and only being billed to the health insurer at the time of its closure. The expenditure of each record is allocated to the date of the record opening, allowing us to know the calendar year in which the individual decided to start the treatment, as relevant for our research. For the years of 2009 and 2010, the cost of a treatment record is observed in the corresponding annual dataset if reported to the insurer up to the end of the 3rd trimester of the following year (September of 2010 and 2011, respectively). For the years of 2011 to 2014 the annual data captures all records opened in that year and reported up to the end of the following year (December of 2012 and 2015, respectively). 3
RkJQdWJsaXNoZXIy MjY0ODMw