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. 2020 Feb 11;9:e51168. doi: 10.7554/eLife.51168

Figure 1. Selection of the study population.

Figure 1.

Figure 1—figure supplement 1. Time line of data collection from each of the registers and the total follow-up time.

Figure 1—figure supplement 1.

Foot note: *Anatomic Therapeutical Chemical (ATC) code for dementia (N06D) is also used for patients with Parkinson’s disease, but the treatment is only indicated if the patients have comorbid dementia. **Dementia was identified by international classification of disease (ICD) version 8 codes (290.00–290.99) until the end of 1994 and by ICD10 codes (F00.0-F03.9; G30.0-G30.9) from 1995 and thereafter.