The present study was part of the project “Maps of Healthcare Needs—Database of Systemic and Implementation Analyses” and was co-financed by the European Union funds through the European Social Fund under the Knowledge Education and Development Operational Program (EU grant number: POWR 05.02.00-00-0149/15-01). The Polish Ministry of Health, which is entitled by the Law of Republic of Poland to process the data of the national database of hospitalization, approved the study protocol. However, we did not need to obtain ethics committee approval; the study adhered to the tenets of the Declaration of Helsinki for research involving human subjects. The study design was a retrospective and nationwide survey which was described in detail in our previous papers [13 (link),14 (link),15 (link),16 (link),17 (link),18 (link),19 (link)]. The data of all adult patients who were diagnosed with retinal detachment between 1 January 2013 and 31 December 2019 were extracted from the national database of hospitalization [20 ]. This database is maintained by the National Health Fund (NHF) and records all medical procedures in public and private hospitals in Poland financed from public sources. It provides accurate population-based medical data which include the diagnoses coded according to the International Classification of Diseases, 10th Revision (ICD-10), and all procedures performed were coded using the International Classification of Diseases, 9th Revision (ICD-9) procedure codes and unique NHF codes corresponding to certain hospital procedures. It also compiles demographical features such as personal identification number (PESEL), date of birth, area code, and sex of patients. Data regarding the population of Poland were obtained from the Central Statistical Office of Poland [21 ].
During the study period, in the years 2013–2019, each individual patient with retinal detachment in the national database of hospitalization was identified with ICD-10 codes H33.0, H33.2, H33.4, H33.5 and H33 (unspecified RD). The ICD-9 codes 14.3 with extensions were used to identify repair of retinal tear with diathermy, cryotherapy or laser photocoagulation. The ICD-9 codes 14.4 with extensions were used to identify repair of retinal detachment with scleral buckling and implant. The ICD-9 codes 14.5 with extensions were used to identify repair of retinal detachment with diathermy, cryotherapy or laser photocoagulation. The ICD-9 codes 14.74 and 14.75 were used to identify repair of retinal detachment with pars plana vitrectomy (and injection of vitreous substitute). Other treatment of retinal detachment was identified with ICD-9 code 14.9.
During the study period, in the years 2013–2019, each individual patient with retinal detachment in the national database of hospitalization was identified with ICD-10 codes H33.0, H33.2, H33.4, H33.5 and H33 (unspecified RD). The ICD-9 codes 14.3 with extensions were used to identify repair of retinal tear with diathermy, cryotherapy or laser photocoagulation. The ICD-9 codes 14.4 with extensions were used to identify repair of retinal detachment with scleral buckling and implant. The ICD-9 codes 14.5 with extensions were used to identify repair of retinal detachment with diathermy, cryotherapy or laser photocoagulation. The ICD-9 codes 14.74 and 14.75 were used to identify repair of retinal detachment with pars plana vitrectomy (and injection of vitreous substitute). Other treatment of retinal detachment was identified with ICD-9 code 14.9.
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