Table 1. Characteristics of Included Studies.
| Source | Data source | No. of cases/controls | Study period | Age, mean (SD), y | Female sex, % | Definition of psoriasis | Risk of VTE or PVD, HR (95% CI) |
|---|---|---|---|---|---|---|---|
| Ahlehoff et al,29 2011; Denmark | National Prescription Registry, National Causes of Death Register, and Central Population Register | 38 664/4 126 075 | 1997-2006 | 47.8 (16) | 49.9 | Psoriasis criteria ICD-10 codes L40 or M070–M073 | RR, 1.33 (1.21-1.47) for VTE |
| Bengtsson et al,30 2017; Sweden | Swedish National Patient Register and Swedish Population Register | 16 063/266 435 | 2006-2012 | 53.2 (13.8) | 55.1 | ICD-8 code 696.0, ICD-9 code 696.0, or ICD-10 codes L40 or M070–M073 | 1.46 (1.29-1.65) for VTE |
| Charlton et al,38 2018; UK | Clinical Practice Research Datalink | 33 915/27 132 | 1998-2014 | Median (IQR), 49 (39-59) | 50.9 | Read code | RR, 1.40 (1.02-1.92) for PVD |
| Chung et al,31 2017; Taiwan | National Health Insurance Research Database | 8945/8945 | 2000-2011 | 54.8 (17.1) | 26.6 | ICD-9 code 696 | 2.02 (1.42-2.88) for VTE |
| Dowlatshahi et al,39 2013; the Netherlands | Rotterdam Study | 262/8009 | 1990-2011 | 64.3 (6.8) | 56.1 | General practitioner code S91 | RR, 1.04 (0.73-1.47) for PVD |
| Galloway,32 2020; UK | Royal College of General Practitioners Research and Surveillance Centre database | 6297/213 512 | 1999-2018 | 49.2 (13.8) | 50.9 | Read code | 1.20 (0.96-1.52) for VTE |
| Kaine et al,40 2018; US | Truven Health Analytics MarketScan Commercial Claims and Medicare supplemental databases | 14 898/35 037 | 2008-2015 | 53.4 (12.4) | 55.4 | ICD-9 code 696.0 | 1.25 (1.09-1.44) for PVD |
| Kaye et al,41 2008; US | General Practice Research Database | 44 164/219 784 | 1991-2005 | NS | 52.2 | Oxford Medical Information System and Read codes | 1.29 (1.13-1.47) for PVD |
| Lutsey et al,33 2012; US | Iowa Women's Health Study | 859/37 749 | 1991-2004 | 67.8 (3) | 100 | ICD-9 code 696.1 | 1.39 (1.00-1.93) for VTE |
| Ogdie et al,34 2018; UK | The Health Improvement Network | 194 288/1 225 571 | 1994-2014 | 46.7 (17.5) | 51.1 | Read code | 1.08 (1.03-1.12) for VTE |
| Ramagopalan et al,35 2011; UK | English national hospital episode statistics | 85 358/3 621 957 | 1999-2008 | NS | 48.0 | ICD-9 codes 696.0, 696.1, 696.8, or 696.9 | RR, 1.66 (1.57-1.75) for VTE |
| Schneeweiss et al,36 2021; US | Optum deidentified Clinformatics Data Mart Database | 96 138/1 570 387 | 2004-2019 | 49.8 (15.9) | 50.5 | ICD-9 code 696.1 or ICD-10 code L40 | 0.86 (0.75-0.99) for VTE |
| Zoller et al,37 2012; Sweden | MigMed2 | 25 869/509 669 | 1964-2008 | NS | 47.2 | ICD-7 code 706, ICD-8 code 696, ICD-9 code 696, or ICD-10 code L40 | SIR, 1.40 (1.31-1.50) for VTE |
Abbreviations: HR, hazard ratio; ICD, International Classification of Diseases; NS, not specified; PVD, peripheral vascular disease; RR, risk ratio; SIR, standardized incidence ratio; VTE, venous thromboembolism.