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Characteristics of case-control studies.
| Author, year (country) | Period of recruitment | Study size | Number of PD patients | Assessment of antihypertensive use | Assessment of PD |
|---|---|---|---|---|---|
| Ritz et al., 2010 [10] (Denmark) | 2001–2006 | 11582 | 1931 | National Pharmacy Database | Hospital records |
| Becker et al., 2008 [9] (UK) | 1994–2005 | 7274 | 3637 | General practice research database | General practice research database |
| Ton et al., 2007 [11] (USA) |
1992–2002 | 556 | 191 | Medical records | Medical records and cardinal signs |
